// SPDX-License-Identifier: GPL-2.0+
/*
* Cisco Meraki MX100 (Tinkerbell) board platform driver
*
* Based off of arch/x86/platform/meraki/tink.c from the
* Meraki GPL release meraki-firmware-sources-r23-20150601
*
* Format inspired by platform/x86/pcengines-apuv2.c
*
* Copyright (C) 2021 Chris Blake <chrisrblake93@gmail.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/dmi.h>
#include <linux/err.h>
#include <linux/gpio_keys.h>
#include <linux/gpio/machine.h>
#include <linux/input.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#define TINK_GPIO_DRIVER_NAME "gpio_ich"
/* LEDs */
static const struct gpio_led tink_leds[] = {
{
.name = "mx100:green:internet" ,
.default_trigger = "default-on" ,
},
{
.name = "mx100:green:lan2" ,
},
{
.name = "mx100:green:lan3" ,
},
{
.name = "mx100:green:lan4" ,
},
{
.name = "mx100:green:lan5" ,
},
{
.name = "mx100:green:lan6" ,
},
{
.name = "mx100:green:lan7" ,
},
{
.name = "mx100:green:lan8" ,
},
{
.name = "mx100:green:lan9" ,
},
{
.name = "mx100:green:lan10" ,
},
{
.name = "mx100:green:lan11" ,
},
{
.name = "mx100:green:ha" ,
},
{
.name = "mx100:orange:ha" ,
},
{
.name = "mx100:green:usb" ,
},
{
.name = "mx100:orange:usb" ,
},
};
static const struct gpio_led_platform_data tink_leds_pdata = {
.num_leds = ARRAY_SIZE(tink_leds),
.leds = tink_leds,
};
static struct gpiod_lookup_table tink_leds_table = {
.dev_id = "leds-gpio" ,
.table = {
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 11 ,
NULL, 0 , GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 18 ,
NULL, 1 , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 20 ,
NULL, 2 , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 22 ,
NULL, 3 , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 23 ,
NULL, 4 , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 32 ,
NULL, 5 , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 34 ,
NULL, 6 , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 35 ,
NULL, 7 , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 36 ,
NULL, 8 , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 37 ,
NULL, 9 , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 48 ,
NULL, 10 , GPIO_ACTIVE_HIGH),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 16 ,
NULL, 11 , GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 7 ,
NULL, 12 , GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 21 ,
NULL, 13 , GPIO_ACTIVE_LOW),
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 19 ,
NULL, 14 , GPIO_ACTIVE_LOW),
{} /* Terminating entry */
}
};
/* Reset Button */
static struct gpio_keys_button tink_buttons[] = {
{
.desc = "Reset" ,
.type = EV_KEY,
.code = KEY_RESTART,
.active_low = 1 ,
.debounce_interval = 100 ,
},
};
static const struct gpio_keys_platform_data tink_buttons_pdata = {
.buttons = tink_buttons,
.nbuttons = ARRAY_SIZE(tink_buttons),
.poll_interval = 20 ,
.rep = 0 ,
.name = "mx100-keys" ,
};
static struct gpiod_lookup_table tink_keys_table = {
.dev_id = "gpio-keys-polled" ,
.table = {
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 60 ,
NULL, 0 , GPIO_ACTIVE_LOW),
{} /* Terminating entry */
}
};
/* Board setup */
static const struct dmi_system_id tink_systems[] __initconst = {
{
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Cisco" ),
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "MX100-HW" ),
},
},
{} /* Terminating entry */
};
MODULE_DEVICE_TABLE(dmi, tink_systems);
static struct platform_device *tink_leds_pdev;
static struct platform_device *tink_keys_pdev;
static struct platform_device * __init tink_create_dev(
const char *name, const void *pdata, size_t sz)
{
struct platform_device *pdev;
pdev = platform_device_register_data(NULL,
name, PLATFORM_DEVID_NONE, pdata, sz);
if (IS_ERR(pdev))
pr_err("failed registering %s: %ld\n" , name, PTR_ERR(pdev));
return pdev;
}
static int __init tink_board_init(void )
{
int ret;
if (!dmi_first_match(tink_systems))
return -ENODEV;
/*
* We need to make sure that GPIO60 isn't set to native mode as is default since it's our
* Reset Button. To do this, write to GPIO_USE_SEL2 to have GPIO60 set to GPIO mode.
* This is documented on page 1609 of the PCH datasheet, order number 327879-005US
*/
outl(inl(0 x530) | BIT(28 ), 0 x530);
gpiod_add_lookup_table(&tink_leds_table);
gpiod_add_lookup_table(&tink_keys_table);
tink_leds_pdev = tink_create_dev("leds-gpio" ,
&tink_leds_pdata, sizeof (tink_leds_pdata));
if (IS_ERR(tink_leds_pdev)) {
ret = PTR_ERR(tink_leds_pdev);
goto err;
}
tink_keys_pdev = tink_create_dev("gpio-keys-polled" ,
&tink_buttons_pdata, sizeof (tink_buttons_pdata));
if (IS_ERR(tink_keys_pdev)) {
ret = PTR_ERR(tink_keys_pdev);
platform_device_unregister(tink_leds_pdev);
goto err;
}
return 0 ;
err:
gpiod_remove_lookup_table(&tink_keys_table);
gpiod_remove_lookup_table(&tink_leds_table);
return ret;
}
module_init(tink_board_init);
static void __exit tink_board_exit(void )
{
platform_device_unregister(tink_keys_pdev);
platform_device_unregister(tink_leds_pdev);
gpiod_remove_lookup_table(&tink_keys_table);
gpiod_remove_lookup_table(&tink_leds_table);
}
module_exit(tink_board_exit);
MODULE_AUTHOR("Chris Blake <chrisrblake93@gmail.com>" );
MODULE_DESCRIPTION("Cisco Meraki MX100 Platform Driver" );
MODULE_LICENSE("GPL" );
MODULE_ALIAS("platform:meraki-mx100" );
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