// 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(0x530) | BIT(28), 0x530);
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");
