drivers/hwmon/sch56xx-common.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *   Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com>           *
21 #include "sch56xx-common.h"
30 #define SIO_UNLOCK_KEY		0x55	/* Key to enable Super-I/O */
31 #define SIO_LOCK_KEY		0xAA	/* Key to disable Super-I/O */
82 		return -EBUSY;  in superio_enter()
109 	 * responds within 15-32 reads, so we first busy poll, and if  in sch56xx_send_cmd()
116 	/* (Optional) Write-Clear the EC to Host Mailbox Register */  in sch56xx_send_cmd()
120 	/* Set Mailbox Address Pointer to first location in Region 1 */  in sch56xx_send_cmd()
126 	outb(0x01, addr + 5); /* # of Entries: 1 Byte (8-bit) */  in sch56xx_send_cmd()
127 	outb(0x04, addr + 2); /* Mailbox AP to first data entry loc. */  in sch56xx_send_cmd()
138 	outb(0x01, addr); /* Write 01h to the Host-to-EC register */  in sch56xx_send_cmd()
156 		return -EIO;  in sch56xx_send_cmd()
164 		/* Read EC-to-Host Register */  in sch56xx_send_cmd()
177 		return -EIO;  in sch56xx_send_cmd()
183 	 * Set Mailbox Address Pointer to first location in Region 1 *  in sch56xx_send_cmd()
211 	int lsb, msb;  in sch56xx_read_virtual_reg16()  local
213 	/* Read LSB first, this will cause the matching MSB to be latched */  in sch56xx_read_virtual_reg16()
214 	lsb = sch56xx_read_virtual_reg(addr, reg);  in sch56xx_read_virtual_reg16()
215 	if (lsb < 0)  in sch56xx_read_virtual_reg16()
216 		return lsb;  in sch56xx_read_virtual_reg16()
222 	return lsb | (msb << 8);  in sch56xx_read_virtual_reg16()
231 	/* Read MSB first, this will cause the matching LSN to be latched */  in sch56xx_read_virtual_reg12()
253 	int lsb, msb, ret;  in sch56xx_regmap_read16()  local
256 	ret = regmap_read(map, reg, &lsb);  in sch56xx_regmap_read16()
264 	*val = lsb | (msb << 8);  in sch56xx_regmap_read16()
287 	mutex_lock(bus->lock);  in sch56xx_reg_write()
288 	ret = sch56xx_write_virtual_reg(bus->addr, (u16)reg, (u8)val);  in sch56xx_reg_write()
289 	mutex_unlock(bus->lock);  in sch56xx_reg_write()
299 	mutex_lock(bus->lock);  in sch56xx_reg_read()
300 	ret = sch56xx_read_virtual_reg(bus->addr, (u16)reg);  in sch56xx_reg_read()
301 	mutex_unlock(bus->lock);  in sch56xx_reg_read()
330 	if (config->reg_bits != 16 && config->val_bits != 8)  in devm_regmap_init_sch56xx()
331 		return ERR_PTR(-EOPNOTSUPP);  in devm_regmap_init_sch56xx()
335 		return ERR_PTR(-ENOMEM);  in devm_regmap_init_sch56xx()
337 	context->lock = lock;  in devm_regmap_init_sch56xx()
338 	context->addr = addr;  in devm_regmap_init_sch56xx()
367 		return -EINVAL;  in watchdog_set_timeout()
370 		control = data->watchdog_control | SCH56XX_WDOG_TIME_BASE_SEC;  in watchdog_set_timeout()
372 		control = data->watchdog_control & ~SCH56XX_WDOG_TIME_BASE_SEC;  in watchdog_set_timeout()
374 	if (data->watchdog_control != control) {  in watchdog_set_timeout()
375 		mutex_lock(data->io_lock);  in watchdog_set_timeout()
376 		ret = sch56xx_write_virtual_reg(data->addr,  in watchdog_set_timeout()
379 		mutex_unlock(data->io_lock);  in watchdog_set_timeout()
383 		data->watchdog_control = control;  in watchdog_set_timeout()
390 	data->watchdog_preset = DIV_ROUND_UP(timeout, resolution);  in watchdog_set_timeout()
391 	wddev->timeout = data->watchdog_preset * resolution;  in watchdog_set_timeout()
408 	 * of the second interrupt source register (at base-address + 9),  in watchdog_start()
411 	 * This will only cause a system reset if the 0-1 flank happens when  in watchdog_start()
418 	 * first!  in watchdog_start()
421 	mutex_lock(data->io_lock);  in watchdog_start()
424 	ret = sch56xx_write_virtual_reg(data->addr, SCH56XX_REG_WDOG_PRESET,  in watchdog_start()
425 					data->watchdog_preset);  in watchdog_start()
430 	val = data->watchdog_output_enable | SCH56XX_WDOG_OUTPUT_ENABLE;  in watchdog_start()
431 	ret = sch56xx_write_virtual_reg(data->addr,  in watchdog_start()
436 	data->watchdog_output_enable = val;  in watchdog_start()
439 	val = inb(data->addr + 9);  in watchdog_start()
441 		outb(0x01, data->addr + 9);  in watchdog_start()
444 	mutex_unlock(data->io_lock);  in watchdog_start()
454 	mutex_lock(data->io_lock);  in watchdog_trigger()
455 	ret = sch56xx_write_virtual_reg(data->addr, SCH56XX_REG_WDOG_PRESET,  in watchdog_trigger()
456 					data->watchdog_preset);  in watchdog_trigger()
457 	mutex_unlock(data->io_lock);  in watchdog_trigger()
468 	val = data->watchdog_output_enable & ~SCH56XX_WDOG_OUTPUT_ENABLE;  in watchdog_stop()
469 	mutex_lock(data->io_lock);  in watchdog_stop()
470 	ret = sch56xx_write_virtual_reg(data->addr,  in watchdog_stop()
472 	mutex_unlock(data->io_lock);  in watchdog_stop()
476 	data->watchdog_output_enable = val;  in watchdog_stop()
515 	data->addr = addr;  in sch56xx_watchdog_register()
516 	data->io_lock = io_lock;  in sch56xx_watchdog_register()
518 	strscpy(data->wdinfo.identity, "sch56xx watchdog", sizeof(data->wdinfo.identity));  in sch56xx_watchdog_register()
519 	data->wdinfo.firmware_version = revision;  in sch56xx_watchdog_register()
520 	data->wdinfo.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT;  in sch56xx_watchdog_register()
522 		data->wdinfo.options |= WDIOF_MAGICCLOSE;  in sch56xx_watchdog_register()
524 	data->wddev.info = &data->wdinfo;  in sch56xx_watchdog_register()
525 	data->wddev.ops = &watchdog_ops;  in sch56xx_watchdog_register()
526 	data->wddev.parent = parent;  in sch56xx_watchdog_register()
527 	data->wddev.timeout = 60;  in sch56xx_watchdog_register()
528 	data->wddev.min_timeout = 1;  in sch56xx_watchdog_register()
529 	data->wddev.max_timeout = 255 * 60;  in sch56xx_watchdog_register()
530 	watchdog_set_nowayout(&data->wddev, nowayout);  in sch56xx_watchdog_register()
532 		set_bit(WDOG_HW_RUNNING, &data->wddev.status);  in sch56xx_watchdog_register()
535 	   the BIOS set timeout from (if any was set at all) ->  in sch56xx_watchdog_register()
538 		data->watchdog_preset = 60; /* seconds */  in sch56xx_watchdog_register()
540 		data->watchdog_preset = 1; /* minute */  in sch56xx_watchdog_register()
542 	data->watchdog_control = control;  in sch56xx_watchdog_register()
543 	data->watchdog_output_enable = output_enable;  in sch56xx_watchdog_register()
545 	watchdog_set_drvdata(&data->wddev, data);  in sch56xx_watchdog_register()
546 	err = devm_watchdog_register_device(parent, &data->wddev);  in sch56xx_watchdog_register()
579 		err = -ENODEV;  in sch56xx_find()
587 		err = -ENODEV;  in sch56xx_find()
599 		err = -ENODEV;  in sch56xx_find()
613 		.end	= address + REGION_LENGTH - 1,  in sch56xx_device_add()
623 	sch56xx_pdev = platform_device_register_simple(name, -1, &res, 1);  in sch56xx_device_add()