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[2620:18c:0:1001::106]) by smtp.gmail.com with ESMTPSA id e2sm6724006pfa.64.2019.03.30.01.18.57 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 30 Mar 2019 01:19:16 -0700 (PDT) From: Tom Li To: Lee Jones Cc: linux-mips@vger.kernel.org, Paul Burton , linux-kernel@vger.kernel.org, Tom Li , Yifeng Li Subject: [PATCH 1/1] mfd: yeeloong_kb3310b: support KB3310B EC for Lemote Yeeloong laptops. Date: Sat, 30 Mar 2019 16:18:36 +0800 Message-Id: <20190330081836.26942-2-biergaizi2009@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190330081836.26942-1-biergaizi2009@gmail.com> References: <20190330081836.26942-1-biergaizi2009@gmail.com> MIME-Version: 1.0 Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Yifeng Li Lemote Yeeloong is a laptop powered by Loongson 2F MIPS processor, primarily a demo platform for hobbyists and developers. It uses an ENE KB3310B Embedded Controller with customized firmware to implement hardware and power management. A monolithic platform driver code for those functionality has existed out-of-tree for many years. This commit creates a MFD driver for the EC chip on Yeeloong laptop to isolate EC-related code from core MIPS code, and serves as the foundation of various subdrivers. NOTE: A regmap could be the reasonable abstraction for I/O, but (1) it requires some additional refactoring to convert the shutdown/wakeup routines in board files to subdrivers, and (2) we're only using simple reads/writes, repmap only adds boilerplates to the existing files without additional benefits. We simply export the EC-related functions for now, until we come back to refactor the board files. Signed-off-by: Yifeng Li --- MAINTAINERS | 7 + drivers/mfd/Kconfig | 10 ++ drivers/mfd/Makefile | 1 + drivers/mfd/yeeloong_kb3310b.c | 200 +++++++++++++++++++++++++ include/linux/mfd/yeeloong_kb3310b.h | 211 +++++++++++++++++++++++++++ 5 files changed, 429 insertions(+) create mode 100644 drivers/mfd/yeeloong_kb3310b.c create mode 100644 include/linux/mfd/yeeloong_kb3310b.h diff --git a/MAINTAINERS b/MAINTAINERS index 51029a425dbe..208f19801a23 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -16839,6 +16839,13 @@ S: Maintained F: Documentation/input/devices/yealink.rst F: drivers/input/misc/yealink.* +YEELOONG ENE KB3310B MFD DRIVER +M: Tom Li +L: linux-mips@vger.kernel.org +S: Maintained +F: drivers/mfd/yeeloong_kb3310b.c +F: include/linux/mfd/yeeloong_kb3310b.h + Z8530 DRIVER FOR AX.25 M: Joerg Reuter W: http://yaina.de/jreuter/ diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index f461460a2aeb..a6da8cce72fc 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1872,6 +1872,16 @@ config MFD_STM32_TIMERS for PWM and IIO Timer. This driver allow to share the registers between the others drivers. +config MFD_YEELOONG_KB3310B + bool "ENE KB3310B Embedded Controller on Lemote Yeeloong laptops" + depends on (MIPS && LEMOTE_MACH2F) || COMPILE_TEST + select MFD_CORE + help + Select this option to enable ENE KB3310B Embedded Controller + driver used on Lemote Yeeloong laptops, providing power, battery + and backlight services. This is a mandatory dependency for + Lemote 2F systems. + menu "Multimedia Capabilities Port drivers" depends on ARCH_SA1100 diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 12980a4ad460..a3446ce7c384 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -224,6 +224,7 @@ obj-$(CONFIG_MFD_HI655X_PMIC) += hi655x-pmic.o obj-$(CONFIG_MFD_DLN2) += dln2.o obj-$(CONFIG_MFD_RT5033) += rt5033.o obj-$(CONFIG_MFD_SKY81452) += sky81452.o +obj-$(CONFIG_MFD_YEELOONG_KB3310B) += yeeloong_kb3310b.o intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o diff --git a/drivers/mfd/yeeloong_kb3310b.c b/drivers/mfd/yeeloong_kb3310b.c new file mode 100644 index 000000000000..423d5ced2f65 --- /dev/null +++ b/drivers/mfd/yeeloong_kb3310b.c @@ -0,0 +1,200 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +/* + * MFD driver for ENE KB3310B embedded controller on Lemote Yeeloong laptops + * + * Copyright (C) 2008 Lemote Inc. + * Author: liujl , 2008-04-20 + * + * Copyright (C) 2019 Yifeng Li + * Author: Yifeng Li + * + * This is a MFD driver for the ENE KB3310B Embedded Controller for Lemote + * Yeeloong laptops to provide utility functions to access the chip from + * subdrivers, and handle events and interrupts in board files. This is a + * special-purpose driver, and it's only used on Lemote Yeeloong laptops, + * and is a mandatory dependency. + * + * NOTE: A regmap could be the reasonable abstraction for I/O, but (1) + * it requires some additional refactoring to convert the shutdown/wakeup + * routines in board files to subdrivers, and (2) we're only using simple + * reads/writes, repmap only adds boilerplates to the existing files without + * additional benefits. We simply export the EC-related functions for now, + * until we come back to refactor the board files. + */ + +#include +#include +#include +#include +#include + +#include + +#ifdef pr_fmt +#undef pr_fmt +#endif + +#define DRV_NAME "yeeloong_kb3310b" +#define pr_fmt(fmt) DRV_NAME ": " fmt + +/* + * Most drivers, such as battery or backlight drivers, uses the I/O ports to + * access the Index Registers to obtain hardware status and information from + * EC chip. + */ +static struct kb3310b_chip *kb3310b_fwinfo; + +static const struct mfd_cell kb3310b_cells[] = { + { .name = "yeeloong_sci" }, + { .name = "yeeloong_hwmon" }, + { .name = "yeeloong_battery" }, + { .name = "yeeloong_backlight" }, + { .name = "yeeloong_lcd" }, + { .name = "yeeloong_hotkey" }, +}; + +static DEFINE_SPINLOCK(kb3310b_index_lock); + +u8 kb3310b_read(u16 reg) +{ + unsigned long flags; + u8 val; + + spin_lock_irqsave(&kb3310b_index_lock, flags); + + outb((reg & 0xff00) >> 8, KB3310B_IO_PORT_HIGH); + outb((reg & 0x00ff), KB3310B_IO_PORT_LOW); + val = inb(KB3310B_IO_PORT_DATA); + + spin_unlock_irqrestore(&kb3310b_index_lock, flags); + + return val; +} +EXPORT_SYMBOL_GPL(kb3310b_read); + +void kb3310b_write(u16 reg, u8 val) +{ + unsigned long flags; + + spin_lock_irqsave(&kb3310b_index_lock, flags); + + outb((reg & 0xff00) >> 8, KB3310B_IO_PORT_HIGH); + outb((reg & 0x00ff), KB3310B_IO_PORT_LOW); + outb(val, KB3310B_IO_PORT_DATA); + inb(KB3310B_IO_PORT_DATA); /* flush pending writes */ + + spin_unlock_irqrestore(&kb3310b_index_lock, flags); +} +EXPORT_SYMBOL_GPL(kb3310b_write); + +bool kb3310b_fw_earlier(char *version) +{ + return (strncasecmp(kb3310b_fwinfo->version, + version, KB3310B_VERSION_LEN) < 0); +} +EXPORT_SYMBOL_GPL(kb3310b_fw_earlier); + +static int kb3310b_probe(struct platform_device *pdev) +{ + kb3310b_fwinfo = dev_get_platdata(&pdev->dev); + pr_info("firmware version %s", kb3310b_fwinfo->version); + + return devm_mfd_add_devices(&pdev->dev, -1, kb3310b_cells, + ARRAY_SIZE(kb3310b_cells), NULL, 0, NULL); +} + +static struct platform_driver kb3310b_driver = { + .driver = { + .name = "yeeloong_kb3310b", + }, + .probe = kb3310b_probe, +}; +builtin_platform_driver(kb3310b_driver); + +/* + * For interrupt handling and power management, the EC chip is also needed to + * be queried from the board file at arch/mips/loongson64, through a separate + * command port. + */ + +/* + * This function is used for EC command writes and corresponding status queries. + */ +int kb3310b_query_seq(unsigned char cmd) +{ + int timeout; + unsigned char status; + + static DEFINE_SPINLOCK(kb3310b_command_lock); + unsigned long flags; + + spin_lock_irqsave(&kb3310b_command_lock, flags); + + /* make chip goto reset mode */ + udelay(KB3310B_REG_UDELAY); + outb(cmd, KB3310B_CMD_PORT); + udelay(KB3310B_REG_UDELAY); + + /* check if the command is received by EC */ + timeout = KB3310B_CMD_TIMEOUT; + status = inb(KB3310B_STS_PORT); + while (timeout-- && (status & (1 << 1))) { + status = inb(KB3310B_STS_PORT); + udelay(KB3310B_REG_UDELAY); + } + + spin_unlock_irqrestore(&kb3310b_command_lock, flags); + + if (timeout <= 0) { + pr_err("(%x/NA) failed to issue command %d, no response!\n", + timeout, cmd); + return -EINVAL; + } + + pr_info("(%x/%x) issued command %d, status: 0x%x\n", + timeout, KB3310B_CMD_TIMEOUT - timeout, + cmd, status); + + return 0; +} +EXPORT_SYMBOL_GPL(kb3310b_query_seq); + +/* + * Send query command to EC to get the proper event number. + */ +int kb3310b_query_event_num(void) +{ + return kb3310b_query_seq(KB3310B_CMD_GET_EVENT_NUM); +} +EXPORT_SYMBOL_GPL(kb3310b_query_event_num); + +/* + * Get event number from EC. + * + * NOTE: This routine must follow the query_event_num function in the + * interrupt. + */ +int kb3310b_get_event_num(void) +{ + int timeout = 100; + unsigned char value; + unsigned char status; + + udelay(KB3310B_REG_UDELAY); + status = inb(KB3310B_STS_PORT); + udelay(KB3310B_REG_UDELAY); + while (timeout-- && !(status & (1 << 0))) { + status = inb(KB3310B_STS_PORT); + udelay(KB3310B_REG_UDELAY); + } + if (timeout <= 0) { + pr_info("%s: get event number timeout.\n", __func__); + return -EINVAL; + } + value = inb(KB3310B_DAT_PORT); + udelay(KB3310B_REG_UDELAY); + + return value; +} +EXPORT_SYMBOL_GPL(kb3310b_get_event_num); diff --git a/include/linux/mfd/yeeloong_kb3310b.h b/include/linux/mfd/yeeloong_kb3310b.h new file mode 100644 index 000000000000..ba8b82153bcd --- /dev/null +++ b/include/linux/mfd/yeeloong_kb3310b.h @@ -0,0 +1,211 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +/* + * MFD driver for ENE KB3310B embedded controller on Lemote Yeeloong laptops + * + * Copyright (C) 2008 Lemote Inc. + * Author: liujl , 2008-04-20 + * + * Copyright (C) 2019 Yifeng Li + * Author: Yifeng Li + */ + +#ifndef __LINUX_MFD_YEELOONG_KB3310B_H +#define __LINUX_MFD_YEELOONG_KB3310B_H + +extern u8 kb3310b_read(u16 reg); +extern void kb3310b_write(u16 reg, u8 val); +extern bool kb3310b_fw_earlier(char *version); +extern int kb3310b_query_seq(unsigned char cmd); +extern int kb3310b_query_event_num(void); +extern int kb3310b_get_event_num(void); + +typedef int (*sci_handler) (int status); + +extern int yeeloong_sci_register_notify(struct notifier_block *nb); +extern int yeeloong_sci_unregister_notify(struct notifier_block *nb); + +#define KB3310B_VERSION_LEN 8 + +struct kb3310b_chip { + char version[KB3310B_VERSION_LEN]; +}; + +#define KB3310B_SCI_IRQ_NUM 0x0A + +/* + * The following registers are determined by the EC index configuration. + * 1, fill the PORT_HIGH as EC register high part. + * 2, fill the PORT_LOW as EC register low part. + * 3, fill the PORT_DATA as EC register write data or get the data from it. + */ +#define KB3310B_IO_PORT_HIGH 0x0381 +#define KB3310B_IO_PORT_LOW 0x0382 +#define KB3310B_IO_PORT_DATA 0x0383 + +/* + * EC delay time is 500us for register and status access + */ +#define KB3310B_REG_UDELAY 500 +#define KB3310B_CMD_TIMEOUT 0x1000 + +/* + * EC access port for SCI communication + */ +#define KB3310B_CMD_PORT 0x66 +#define KB3310B_STS_PORT 0x66 +#define KB3310B_DAT_PORT 0x62 +#define KB3310B_CMD_INIT_IDLE_MODE 0xdd +#define KB3310B_CMD_EXIT_IDLE_MODE 0xdf +#define KB3310B_CMD_INIT_RESET_MODE 0xd8 +#define KB3310B_CMD_REBOOT_SYSTEM 0x8c +#define KB3310B_CMD_GET_EVENT_NUM 0x84 +#define KB3310B_CMD_PROGRAM_PIECE 0xda + +/* temperature & fan registers */ +#define KB3310B_REG_TEMPERATURE_VALUE 0xF458 +#define KB3310B_REG_FAN_AUTO_MAN_SWITCH 0xF459 +#define KB3310B_BIT_FAN_AUTO 0 +#define KB3310B_BIT_FAN_MANUAL 1 +#define KB3310B_REG_FAN_CONTROL 0xF4D2 +#define KB3310B_BIT_FAN_CONTROL_ON (1 << 0) +#define KB3310B_BIT_FAN_CONTROL_OFF (0 << 0) +#define KB3310B_REG_FAN_STATUS 0xF4DA +#define KB3310B_BIT_FAN_STATUS_ON (1 << 0) +#define KB3310B_BIT_FAN_STATUS_OFF (0 << 0) +#define KB3310B_REG_FAN_SPEED_HIGH 0xFE22 +#define KB3310B_REG_FAN_SPEED_LOW 0xFE23 +#define KB3310B_REG_FAN_SPEED_LEVEL 0xF4CC + +/* fan speed divider */ +#define KB3310B_FAN_SPEED_DIVIDER 480000 /* (60*1000*1000/62.5/2)*/ + +/* battery registers */ +#define KB3310B_REG_BAT_DESIGN_CAP_HIGH 0xF77D +#define KB3310B_REG_BAT_DESIGN_CAP_LOW 0xF77E +#define KB3310B_REG_BAT_FULLCHG_CAP_HIGH 0xF780 +#define KB3310B_REG_BAT_FULLCHG_CAP_LOW 0xF781 +#define KB3310B_REG_BAT_DESIGN_VOL_HIGH 0xF782 +#define KB3310B_REG_BAT_DESIGN_VOL_LOW 0xF783 +#define KB3310B_REG_BAT_CURRENT_HIGH 0xF784 +#define KB3310B_REG_BAT_CURRENT_LOW 0xF785 +#define KB3310B_REG_BAT_VOLTAGE_HIGH 0xF786 +#define KB3310B_REG_BAT_VOLTAGE_LOW 0xF787 +#define KB3310B_REG_BAT_TEMPERATURE_HIGH 0xF788 +#define KB3310B_REG_BAT_TEMPERATURE_LOW 0xF789 +#define KB3310B_REG_BAT_RELATIVE_CAP_HIGH 0xF492 +#define KB3310B_REG_BAT_RELATIVE_CAP_LOW 0xF493 +#define KB3310B_REG_BAT_VENDOR 0xF4C4 +#define KB3310B_FLAG_BAT_VENDOR_SANYO 0x01 +#define KB3310B_FLAG_BAT_VENDOR_SIMPLO 0x02 +#define KB3310B_REG_BAT_CELL_COUNT 0xF4C6 +#define KB3310B_FLAG_BAT_CELL_3S1P 0x03 +#define KB3310B_FLAG_BAT_CELL_3S2P 0x06 +#define KB3310B_REG_BAT_CHARGE 0xF4A2 +#define KB3310B_FLAG_BAT_CHARGE_DISCHARGE 0x01 +#define KB3310B_FLAG_BAT_CHARGE_CHARGE 0x02 +#define KB3310B_FLAG_BAT_CHARGE_ACPOWER 0x00 +#define KB3310B_REG_BAT_STATUS 0xF4B0 +#define KB3310B_BIT_BAT_STATUS_LOW (1 << 5) +#define KB3310B_BIT_BAT_STATUS_DESTROY (1 << 2) +#define KB3310B_BIT_BAT_STATUS_FULL (1 << 1) +#define KB3310B_BIT_BAT_STATUS_IN (1 << 0) +#define KB3310B_REG_BAT_CHARGE_STATUS 0xF4B1 +#define KB3310B_BIT_BAT_CHARGE_STATUS_OVERTEMP (1 << 2) +#define KB3310B_BIT_BAT_CHARGE_STATUS_PRECHG (1 << 1) +#define KB3310B_REG_BAT_STATE 0xF482 +#define KB3310B_BIT_BAT_STATE_CHARGING (1 << 1) +#define KB3310B_BIT_BAT_STATE_DISCHARGING (1 << 0) +#define KB3310B_REG_BAT_POWER 0xF440 +#define KB3310B_BIT_BAT_POWER_S3 (1 << 2) +#define KB3310B_BIT_BAT_POWER_ON (1 << 1) +#define KB3310B_BIT_BAT_POWER_ACIN (1 << 0) + +/* other registers */ + +/* Audio: rd/wr */ +#define KB3310B_REG_AUDIO_VOLUME 0xF46C +#define KB3310B_REG_AUDIO_MUTE 0xF4E7 +#define KB3310B_REG_AUDIO_BEEP 0xF4D0 + +/* USB port power or not: rd/wr */ +#define KB3310B_REG_USB0_FLAG 0xF461 +#define KB3310B_REG_USB1_FLAG 0xF462 +#define KB3310B_REG_USB2_FLAG 0xF463 +#define KB3310B_BIT_USB_FLAG_ON 1 +#define KB3310B_BIT_USB_FLAG_OFF 0 + +/* LID */ +#define KB3310B_REG_LID_DETECT 0xF4BD +#define KB3310B_BIT_LID_DETECT_ON 1 +#define KB3310B_BIT_LID_DETECT_OFF 0 + +/* CRT */ +#define KB3310B_REG_CRT_DETECT 0xF4AD +#define KB3310B_BIT_CRT_DETECT_PLUG 1 +#define KB3310B_BIT_CRT_DETECT_UNPLUG 0 + +/* LCD backlight brightness adjust: 9 levels */ +#define KB3310B_REG_DISPLAY_BRIGHTNESS 0xF4F5 + +/* Black screen status */ +#define KB3310B_REG_DISPLAY_LCD 0xF79F +#define KB3310B_BIT_DISPLAY_LCD_ON 1 +#define KB3310B_BIT_DISPLAY_LCD_OFF 0 + +/* LCD backlight control: off/restore */ +#define KB3310B_REG_BACKLIGHT_CTRL 0xF7BD +#define KB3310B_BIT_BACKLIGHT_ON 1 +#define KB3310B_BIT_BACKLIGHT_OFF 0 + +/* Reset the machine auto-clear: rd/wr */ +#define KB3310B_REG_RESET 0xF4EC +#define KB3310B_BIT_RESET_ON 1 + +/* Light the LED: rd/wr */ +#define KB3310B_REG_LED 0xF4C8 +#define KB3310B_BIT_LED_RED_POWER (1 << 0) +#define KB3310B_BIT_LED_ORANGE_POWER (1 << 1) +#define KB3310B_BIT_LED_GREEN_CHARGE (1 << 2) +#define KB3310B_BIT_LED_RED_CHARGE (1 << 3) +#define KB3310B_BIT_LED_NUMLOCK (1 << 4) + +/* Test LED mode, all LED on/off */ +#define KB3310B_REG_LED_TEST 0xF4C2 +#define KB3310B_BIT_LED_TEST_IN 1 +#define KB3310B_BIT_LED_TEST_OUT 0 + +/* Camera on/off */ +#define KB3310B_REG_CAMERA_STATUS 0xF46A +#define KB3310B_BIT_CAMERA_STATUS_ON 1 +#define KB3310B_BIT_CAMERA_STATUS_OFF 0 +#define KB3310B_REG_CAMERA_CONTROL 0xF7B7 +#define KB3310B_BIT_CAMERA_CONTROL_OFF 0 +#define KB3310B_BIT_CAMERA_CONTROL_ON 1 + +/* WLAN Status */ +#define KB3310B_REG_WLAN 0xF4FA +#define KB3310B_BIT_WLAN_ON 1 +#define KB3310B_BIT_WLAN_OFF 0 + +/* SCI Event Number from EC */ +enum { + KB3310B_EVENT_START = 0x22, + KB3310B_EVENT_LID = 0x23, /* LID open/close */ + KB3310B_EVENT_DISPLAY_TOGGLE, /* Fn+F3 for display switch */ + KB3310B_EVENT_SLEEP, /* Fn+F1 for entering sleep mode */ + KB3310B_EVENT_OVERTEMP, /* Over-temperature occurred */ + KB3310B_EVENT_CRT_DETECT, /* CRT is connected */ + KB3310B_EVENT_CAMERA, /* Camera on/off */ + KB3310B_EVENT_USB_OC2, /* USB2 Overcurrent occurred */ + KB3310B_EVENT_USB_OC0, /* USB0 Overcurrent occurred */ + KB3310B_EVENT_BLACK_SCREEN, /* Turn on/off backlight */ + KB3310B_EVENT_AUDIO_MUTE, /* Mute on/off */ + KB3310B_EVENT_DISPLAY_BRIGHTNESS, /* LCD backlight brightness adjust */ + KB3310B_EVENT_AC_BAT, /* AC & Battery relative issue */ + KB3310B_EVENT_AUDIO_VOLUME, /* Volume adjust */ + KB3310B_EVENT_WLAN, /* WLAN on/off */ + KB3310B_EVENT_END +}; + +#endif /* !__LINUX_MFD_YEELOONG_KB3310B_H */