diff options
Diffstat (limited to 'drivers/power/reset')
| -rw-r--r-- | drivers/power/reset/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/power/reset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/reset/keystone-reset.c | 2 | ||||
| -rw-r--r-- | drivers/power/reset/linkstation-poweroff.c | 136 |
4 files changed, 149 insertions, 1 deletions
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index f07b982c8dff..0a1fb5c74f83 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -99,6 +99,17 @@ config POWER_RESET_HISI help Reboot support for Hisilicon boards. +config POWER_RESET_LINKSTATION + tristate "Buffalo LinkStation power-off driver" + depends on ARCH_MVEBU || COMPILE_TEST + depends on OF_MDIO && PHYLIB + help + This driver supports turning off some Buffalo LinkStations by + setting an output pin at the ethernet PHY to the correct state. + It also makes the device compatible with the WoL function. + + Say Y here if you have a Buffalo LinkStation LS421D/E. + config POWER_RESET_MSM bool "Qualcomm MSM power-off driver" depends on ARCH_QCOM diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 5710ca469517..c51eceba9ea3 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_POWER_RESET_GEMINI_POWEROFF) += gemini-poweroff.o obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o +obj-${CONFIG_POWER_RESET_LINKSTATION} += linkstation-poweroff.o obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o obj-$(CONFIG_POWER_RESET_MT6323) += mt6323-poweroff.o obj-$(CONFIG_POWER_RESET_OXNAS) += oxnas-restart.o diff --git a/drivers/power/reset/keystone-reset.c b/drivers/power/reset/keystone-reset.c index ad11faae19c5..211eeef0c81a 100644 --- a/drivers/power/reset/keystone-reset.c +++ b/drivers/power/reset/keystone-reset.c @@ -2,7 +2,7 @@ /* * TI keystone reboot driver * - * Copyright (C) 2014 Texas Instruments Incorporated. http://www.ti.com/ + * Copyright (C) 2014 Texas Instruments Incorporated. https://www.ti.com/ * * Author: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com> */ diff --git a/drivers/power/reset/linkstation-poweroff.c b/drivers/power/reset/linkstation-poweroff.c new file mode 100644 index 000000000000..39e89baedb5f --- /dev/null +++ b/drivers/power/reset/linkstation-poweroff.c @@ -0,0 +1,136 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * LinkStation power off restart driver + * Copyright (C) 2020 Daniel González Cabanelas <dgcbueu@gmail.com> + */ + +#include <linux/module.h> +#include <linux/notifier.h> +#include <linux/of.h> +#include <linux/of_mdio.h> +#include <linux/of_platform.h> +#include <linux/reboot.h> +#include <linux/phy.h> + +/* Defines from the eth phy Marvell driver */ +#define MII_MARVELL_COPPER_PAGE 0 +#define MII_MARVELL_LED_PAGE 3 +#define MII_MARVELL_WOL_PAGE 17 +#define MII_MARVELL_PHY_PAGE 22 + +#define MII_PHY_LED_CTRL 16 +#define MII_88E1318S_PHY_LED_TCR 18 +#define MII_88E1318S_PHY_WOL_CTRL 16 +#define MII_M1011_IEVENT 19 + +#define MII_88E1318S_PHY_LED_TCR_INTn_ENABLE BIT(7) +#define MII_88E1318S_PHY_LED_TCR_FORCE_INT BIT(15) +#define MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS BIT(12) +#define LED2_FORCE_ON (0x8 << 8) +#define LEDMASK GENMASK(11,8) + +static struct phy_device *phydev; + +static void mvphy_reg_intn(u16 data) +{ + int rc = 0, saved_page; + + saved_page = phy_select_page(phydev, MII_MARVELL_LED_PAGE); + if (saved_page < 0) + goto err; + + /* Force manual LED2 control to let INTn work */ + __phy_modify(phydev, MII_PHY_LED_CTRL, LEDMASK, LED2_FORCE_ON); + + /* Set the LED[2]/INTn pin to the required state */ + __phy_modify(phydev, MII_88E1318S_PHY_LED_TCR, + MII_88E1318S_PHY_LED_TCR_FORCE_INT, + MII_88E1318S_PHY_LED_TCR_INTn_ENABLE | data); + + if (!data) { + /* Clear interrupts to ensure INTn won't be holded in high state */ + __phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_MARVELL_COPPER_PAGE); + __phy_read(phydev, MII_M1011_IEVENT); + + /* If WOL was enabled and a magic packet was received before powering + * off, we won't be able to wake up by sending another magic packet. + * Clear WOL status. + */ + __phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_MARVELL_WOL_PAGE); + __phy_set_bits(phydev, MII_88E1318S_PHY_WOL_CTRL, + MII_88E1318S_PHY_WOL_CTRL_CLEAR_WOL_STATUS); + } +err: + rc = phy_restore_page(phydev, saved_page, rc); + if (rc < 0) + dev_err(&phydev->mdio.dev, "Write register failed, %d\n", rc); +} + +static int linkstation_reboot_notifier(struct notifier_block *nb, + unsigned long action, void *unused) +{ + if (action == SYS_RESTART) + mvphy_reg_intn(MII_88E1318S_PHY_LED_TCR_FORCE_INT); + + return NOTIFY_DONE; +} + +static struct notifier_block linkstation_reboot_nb = { + .notifier_call = linkstation_reboot_notifier, +}; + +static void linkstation_poweroff(void) +{ + unregister_reboot_notifier(&linkstation_reboot_nb); + mvphy_reg_intn(0); + + kernel_restart("Power off"); +} + +static const struct of_device_id ls_poweroff_of_match[] = { + { .compatible = "buffalo,ls421d" }, + { .compatible = "buffalo,ls421de" }, + { }, +}; + +static int __init linkstation_poweroff_init(void) +{ + struct mii_bus *bus; + struct device_node *dn; + + dn = of_find_matching_node(NULL, ls_poweroff_of_match); + if (!dn) + return -ENODEV; + of_node_put(dn); + + dn = of_find_node_by_name(NULL, "mdio"); + if (!dn) + return -ENODEV; + + bus = of_mdio_find_bus(dn); + of_node_put(dn); + if (!bus) + return -EPROBE_DEFER; + + phydev = phy_find_first(bus); + if (!phydev) + return -EPROBE_DEFER; + + register_reboot_notifier(&linkstation_reboot_nb); + pm_power_off = linkstation_poweroff; + + return 0; +} + +static void __exit linkstation_poweroff_exit(void) +{ + pm_power_off = NULL; + unregister_reboot_notifier(&linkstation_reboot_nb); +} + +module_init(linkstation_poweroff_init); +module_exit(linkstation_poweroff_exit); + +MODULE_AUTHOR("Daniel González Cabanelas <dgcbueu@gmail.com>"); +MODULE_DESCRIPTION("LinkStation power off driver"); +MODULE_LICENSE("GPL v2"); |