Hi Daniel, On 3/21/22 04:16, Daniel Beer wrote: > Winmate FM07 and FM07P in-vehicle computers have a row of five buttons > below the display. This module adds an input device that delivers key > events when these buttons are pressed. > > Signed-off-by: Daniel Beer <daniel.beer@xxxxxxxxxxxxxx> Do you have control of the firmware on this device? If yes then IMHO it would be better to implement this in ACPI using the intel-hid fw API for this, see: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/platform/x86/intel/hid.c Basically you create an ACPI device with one of the HIDs from the driver. Then on button presses you do an ACPI notify on that device with a value of 0xc0 then the driver will call the device's _DSM (device specific ACPI) method with a GUID of eeec56b3-4442-408f-a792-4edd4d758054 and an argument value of INTEL_HID_DSM_HDEM_FN and then you return the event-code for the button. You can remap the event-codes to different KEY_FOO values using /lib/udev/hwdb.d/60-keyboard.hwdb Regards, Hans > --- > drivers/platform/x86/Kconfig | 8 + > drivers/platform/x86/Makefile | 3 + > drivers/platform/x86/winmate-fm07-keys.c | 184 +++++++++++++++++++++++ > 3 files changed, 195 insertions(+) > create mode 100644 drivers/platform/x86/winmate-fm07-keys.c > > diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig > index 24deeeb29af2..62a5754d6ac9 100644 > --- a/drivers/platform/x86/Kconfig > +++ b/drivers/platform/x86/Kconfig > @@ -1138,6 +1138,14 @@ config SIEMENS_SIMATIC_IPC > To compile this driver as a module, choose M here: the module > will be called simatic-ipc. > > +config WINMATE_FM07_KEYS > + tristate "Winmate FM07/FM07P front-panel keys driver" > + depends on INPUT > + help > + Winmate FM07 and FM07P in-vehicle computers have a row of five > + buttons below the display. This module adds an input device > + that delivers key events when these buttons are pressed. > + > endif # X86_PLATFORM_DEVICES > > config PMC_ATOM > diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile > index c12a9b044fd8..04e7c995b838 100644 > --- a/drivers/platform/x86/Makefile > +++ b/drivers/platform/x86/Makefile > @@ -129,3 +129,6 @@ obj-$(CONFIG_PMC_ATOM) += pmc_atom.o > > # Siemens Simatic Industrial PCs > obj-$(CONFIG_SIEMENS_SIMATIC_IPC) += simatic-ipc.o > + > +# Winmate > +obj-$(CONFIG_WINMATE_FM07_KEYS) += winmate-fm07-keys.o > diff --git a/drivers/platform/x86/winmate-fm07-keys.c b/drivers/platform/x86/winmate-fm07-keys.c > new file mode 100644 > index 000000000000..3e75adb15444 > --- /dev/null > +++ b/drivers/platform/x86/winmate-fm07-keys.c > @@ -0,0 +1,184 @@ > +// SPDX-License-Identifier: GPL-2.0 > +// > +// Driver for the Winmate FM07 front-panel keys > +// > +// Author: Daniel Beer <daniel.beer@xxxxxxxxxxxxxx> > + > +#include <linux/init.h> > +#include <linux/module.h> > +#include <linux/input.h> > +#include <linux/ioport.h> > +#include <linux/platform_device.h> > +#include <linux/dmi.h> > +#include <linux/io.h> > + > +#define DRV_NAME "winmate-fm07keys" > + > +#define PORT_CMD 0x6c > +#define PORT_DATA 0x68 > + > +#define EC_ADDR_KEYS 0x3b > +#define EC_CMD_READ 0x80 > + > +#define BASE_KEY KEY_F13 > +#define NUM_KEYS 5 > + > +/* Typically we're done in fewer than 10 iterations */ > +#define LOOP_TIMEOUT 1000 > + > +static void fm07keys_poll(struct input_dev *input) > +{ > + uint8_t k; > + int i; > + > + /* Flush output buffer */ > + i = 0; > + while (inb(PORT_CMD) & 0x01) { > + if (++i >= LOOP_TIMEOUT) > + goto timeout; > + inb(PORT_DATA); > + } > + > + /* Send request and wait for write completion */ > + outb(EC_CMD_READ, PORT_CMD); > + i = 0; > + while (inb(PORT_CMD) & 0x02) > + if (++i >= LOOP_TIMEOUT) > + goto timeout; > + > + outb(EC_ADDR_KEYS, PORT_DATA); > + i = 0; > + while (inb(PORT_CMD) & 0x02) > + if (++i >= LOOP_TIMEOUT) > + goto timeout; > + > + /* Wait for data ready */ > + i = 0; > + while (!(inb(PORT_CMD) & 0x01)) > + if (++i >= LOOP_TIMEOUT) > + goto timeout; > + k = inb(PORT_DATA); > + > + /* Notify of new key states */ > + for (i = 0; i < NUM_KEYS; i++) { > + input_report_key(input, BASE_KEY + i, (~k) & 1); > + k >>= 1; > + } > + > + input_sync(input); > + return; > +timeout: > + dev_err(&input->dev, "timeout polling IO memory\n"); > +} > + > +static int fm07keys_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct input_dev *input; > + int ret; > + int i; > + > + input = devm_input_allocate_device(dev); > + if (!input) { > + dev_err(dev, "no memory for input device\n"); > + return -ENOMEM; > + } > + > + if (!devm_request_region(dev, PORT_CMD, 1, "Winmate FM07 EC")) > + return -EBUSY; > + if (!devm_request_region(dev, PORT_DATA, 1, "Winmate FM07 EC")) > + return -EBUSY; > + > + input->name = "Winmate FM07 front-panel keys"; > + input->phys = DRV_NAME "/input0"; > + > + input->id.bustype = BUS_HOST; > + input->id.vendor = 0x0001; > + input->id.product = 0x0001; > + input->id.version = 0x0100; > + > + __set_bit(EV_KEY, input->evbit); > + > + for (i = 0; i < NUM_KEYS; i++) > + __set_bit(BASE_KEY + i, input->keybit); > + > + ret = input_setup_polling(input, fm07keys_poll); > + if (ret) { > + dev_err(dev, "unable to set up polling, err=%d\n", ret); > + return ret; > + } > + > + input_set_poll_interval(input, 20); > + > + ret = input_register_device(input); > + if (ret) { > + dev_err(dev, "unable to register polled device, err=%d\n", > + ret); > + return ret; > + } > + > + input_sync(input); > + return 0; > +} > + > +static struct platform_driver fm07keys_driver = { > + .probe = fm07keys_probe, > + .driver = { > + .name = DRV_NAME > + }, > +}; > + > +/************************************************************************ > + * Device instance for the FM07 > + */ > + > +static struct platform_device *dev; > + > +static const struct dmi_system_id fm07keys_dmi_table[] __initconst = { > + { > + /* FM07 and FM07P */ > + .matches = { > + DMI_MATCH(DMI_SYS_VENDOR, "Winmate Inc."), > + DMI_MATCH(DMI_PRODUCT_NAME, "IP30"), > + }, > + }, > +}; > + > +static int __init fm07keys_init(void) > +{ > + int ret; > + > + if (!dmi_check_system(fm07keys_dmi_table)) > + return -ENODEV; > + > + ret = platform_driver_register(&fm07keys_driver); > + if (ret) { > + pr_err("fm07keys: failed to register driver, err=%d\n", ret); > + return ret; > + } > + > + dev = platform_device_register_simple(DRV_NAME, -1, NULL, 0); > + if (!dev) { > + pr_err("fm07keys: failed to allocate device\n"); > + ret = -ENOMEM; > + goto fail_alloc; > + } > + > + return 0; > +fail_alloc: > + platform_driver_unregister(&fm07keys_driver); > + return ret; > +} > + > +static void __exit fm07keys_exit(void) > +{ > + platform_driver_unregister(&fm07keys_driver); > + platform_device_unregister(dev); > +} > + > +module_init(fm07keys_init); > +module_exit(fm07keys_exit); > + > +MODULE_AUTHOR("Daniel Beer <daniel.beer@xxxxxxxxxxxxxx>"); > +MODULE_DESCRIPTION("Winmate FM07 front-panel keys driver"); > +MODULE_LICENSE("GPL v2");
