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|
// 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/machine.h>
#include <linux/gpio/property.h>
#include <linux/input-event-codes.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#define TINK_GPIO_DRIVER_NAME "gpio_ich"
static const struct software_node gpio_ich_node = {
.name = TINK_GPIO_DRIVER_NAME,
};
/* LEDs */
static const struct software_node tink_gpio_leds_node = {
.name = "meraki-mx100-leds",
};
static const struct property_entry tink_internet_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:internet"),
PROPERTY_ENTRY_STRING("linux,default-trigger", "default-on"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 11, GPIO_ACTIVE_LOW),
{ }
};
static const struct software_node tink_internet_led_node = {
.name = "internet-led",
.parent = &tink_gpio_leds_node,
.properties = tink_internet_led_props,
};
static const struct property_entry tink_lan2_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:lan2"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 18, GPIO_ACTIVE_HIGH),
{ }
};
static const struct software_node tink_lan2_led_node = {
.name = "lan2-led",
.parent = &tink_gpio_leds_node,
.properties = tink_lan2_led_props,
};
static const struct property_entry tink_lan3_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:lan3"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 20, GPIO_ACTIVE_HIGH),
{ }
};
static const struct software_node tink_lan3_led_node = {
.name = "lan3-led",
.parent = &tink_gpio_leds_node,
.properties = tink_lan3_led_props,
};
static const struct property_entry tink_lan4_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:lan4"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 22, GPIO_ACTIVE_HIGH),
{ }
};
static const struct software_node tink_lan4_led_node = {
.name = "lan4-led",
.parent = &tink_gpio_leds_node,
.properties = tink_lan4_led_props,
};
static const struct property_entry tink_lan5_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:lan5"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 23, GPIO_ACTIVE_HIGH),
{ }
};
static const struct software_node tink_lan5_led_node = {
.name = "lan5-led",
.parent = &tink_gpio_leds_node,
.properties = tink_lan5_led_props,
};
static const struct property_entry tink_lan6_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:lan6"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 32, GPIO_ACTIVE_HIGH),
{ }
};
static const struct software_node tink_lan6_led_node = {
.name = "lan6-led",
.parent = &tink_gpio_leds_node,
.properties = tink_lan6_led_props,
};
static const struct property_entry tink_lan7_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:lan7"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 34, GPIO_ACTIVE_HIGH),
{ }
};
static const struct software_node tink_lan7_led_node = {
.name = "lan7-led",
.parent = &tink_gpio_leds_node,
.properties = tink_lan7_led_props,
};
static const struct property_entry tink_lan8_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:lan8"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 35, GPIO_ACTIVE_HIGH),
{ }
};
static const struct software_node tink_lan8_led_node = {
.name = "lan8-led",
.parent = &tink_gpio_leds_node,
.properties = tink_lan8_led_props,
};
static const struct property_entry tink_lan9_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:lan9"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 36, GPIO_ACTIVE_HIGH),
{ }
};
static const struct software_node tink_lan9_led_node = {
.name = "lan9-led",
.parent = &tink_gpio_leds_node,
.properties = tink_lan9_led_props,
};
static const struct property_entry tink_lan10_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:lan10"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 37, GPIO_ACTIVE_HIGH),
{ }
};
static const struct software_node tink_lan10_led_node = {
.name = "lan10-led",
.parent = &tink_gpio_leds_node,
.properties = tink_lan10_led_props,
};
static const struct property_entry tink_lan11_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:lan11"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 48, GPIO_ACTIVE_HIGH),
{ }
};
static const struct software_node tink_lan11_led_node = {
.name = "lan11-led",
.parent = &tink_gpio_leds_node,
.properties = tink_lan11_led_props,
};
static const struct property_entry tink_ha_green_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:ha"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 16, GPIO_ACTIVE_LOW),
{ }
};
static const struct software_node tink_ha_green_led_node = {
.name = "ha-green-led",
.parent = &tink_gpio_leds_node,
.properties = tink_ha_green_led_props,
};
static const struct property_entry tink_ha_orange_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:orange:ha"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 7, GPIO_ACTIVE_LOW),
{ }
};
static const struct software_node tink_ha_orange_led_node = {
.name = "ha-orange-led",
.parent = &tink_gpio_leds_node,
.properties = tink_ha_orange_led_props,
};
static const struct property_entry tink_usb_green_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:green:usb"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 21, GPIO_ACTIVE_LOW),
{ }
};
static const struct software_node tink_usb_green_led_node = {
.name = "usb-green-led",
.parent = &tink_gpio_leds_node,
.properties = tink_usb_green_led_props,
};
static const struct property_entry tink_usb_orange_led_props[] = {
PROPERTY_ENTRY_STRING("label", "mx100:orange:usb"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 19, GPIO_ACTIVE_LOW),
{ }
};
static const struct software_node tink_usb_orange_led_node = {
.name = "usb-orange-led",
.parent = &tink_gpio_leds_node,
.properties = tink_usb_orange_led_props,
};
/* Reset Button */
static const struct property_entry tink_gpio_keys_props[] = {
PROPERTY_ENTRY_U32("poll-interval", 20),
{ }
};
static const struct software_node tink_gpio_keys_node = {
.name = "mx100-keys",
.properties = tink_gpio_keys_props,
};
static const struct property_entry tink_reset_key_props[] = {
PROPERTY_ENTRY_U32("linux,code", KEY_RESTART),
PROPERTY_ENTRY_STRING("label", "Reset"),
PROPERTY_ENTRY_GPIO("gpios", &gpio_ich_node, 60, GPIO_ACTIVE_LOW),
PROPERTY_ENTRY_U32("linux,input-type", EV_KEY),
PROPERTY_ENTRY_U32("debounce-interval", 100),
{ }
};
static const struct software_node tink_reset_key_node = {
.name = "reset",
.parent = &tink_gpio_keys_node,
.properties = tink_reset_key_props,
};
static const struct software_node *tink_swnodes[] = {
&gpio_ich_node,
/* LEDs nodes */
&tink_gpio_leds_node,
&tink_internet_led_node,
&tink_lan2_led_node,
&tink_lan3_led_node,
&tink_lan4_led_node,
&tink_lan5_led_node,
&tink_lan6_led_node,
&tink_lan7_led_node,
&tink_lan8_led_node,
&tink_lan9_led_node,
&tink_lan10_led_node,
&tink_lan11_led_node,
&tink_ha_green_led_node,
&tink_ha_orange_led_node,
&tink_usb_green_led_node,
&tink_usb_orange_led_node,
/* Keys nodes */
&tink_gpio_keys_node,
&tink_reset_key_node,
NULL
};
/* 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 int __init tink_board_init(void)
{
struct platform_device_info keys_info = {
.name = "gpio-keys-polled",
.id = PLATFORM_DEVID_NONE,
};
struct platform_device_info leds_info = {
.name = "leds-gpio",
.id = PLATFORM_DEVID_NONE,
};
int err;
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);
err = software_node_register_node_group(tink_swnodes);
if (err) {
pr_err("failed to register software nodes: %d\n", err);
return err;
}
leds_info.fwnode = software_node_fwnode(&tink_gpio_leds_node);
tink_leds_pdev = platform_device_register_full(&leds_info);
if (IS_ERR(tink_leds_pdev)) {
err = PTR_ERR(tink_leds_pdev);
pr_err("failed to create LED device: %d\n", err);
goto err_unregister_swnodes;
}
keys_info.fwnode = software_node_fwnode(&tink_gpio_keys_node);
tink_keys_pdev = platform_device_register_full(&keys_info);
if (IS_ERR(tink_keys_pdev)) {
err = PTR_ERR(tink_keys_pdev);
pr_err("failed to create key device: %d\n", err);
goto err_unregister_leds;
}
return 0;
err_unregister_leds:
platform_device_unregister(tink_leds_pdev);
err_unregister_swnodes:
software_node_unregister_node_group(tink_swnodes);
return err;
}
module_init(tink_board_init);
static void __exit tink_board_exit(void)
{
platform_device_unregister(tink_keys_pdev);
platform_device_unregister(tink_leds_pdev);
software_node_unregister_node_group(tink_swnodes);
}
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");
|
