mirror of https://gitee.com/openkylin/linux.git
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* nv_tco: TCO timer driver for nVidia chipsets.
|
|
*
|
|
* (c) Copyright 2005 Google Inc., All Rights Reserved.
|
|
*
|
|
* Supported Chipsets:
|
|
* - MCP51/MCP55
|
|
*
|
|
* (c) Copyright 2000 kernel concepts <nils@kernelconcepts.de>, All Rights
|
|
* Reserved.
|
|
* http://www.kernelconcepts.de
|
|
*
|
|
* Neither kernel concepts nor Nils Faerber admit liability nor provide
|
|
* warranty for any of this software. This material is provided
|
|
* "AS-IS" and at no charge.
|
|
*
|
|
* (c) Copyright 2000 kernel concepts <nils@kernelconcepts.de>
|
|
* developed for
|
|
* Jentro AG, Haar/Munich (Germany)
|
|
*
|
|
* TCO timer driver for NV chipsets
|
|
* based on softdog.c by Alan Cox <alan@redhat.com>
|
|
*/
|
|
|
|
/*
|
|
* Some address definitions for the TCO
|
|
*/
|
|
|
|
#define TCO_RLD(base) ((base) + 0x00) /* TCO Timer Reload and Current Value */
|
|
#define TCO_TMR(base) ((base) + 0x01) /* TCO Timer Initial Value */
|
|
|
|
#define TCO_STS(base) ((base) + 0x04) /* TCO Status Register */
|
|
/*
|
|
* TCO Boot Status bit: set on TCO reset, reset by software or standby
|
|
* power-good (survives reboots), unfortunately this bit is never
|
|
* set.
|
|
*/
|
|
# define TCO_STS_BOOT_STS (1 << 9)
|
|
/*
|
|
* first and 2nd timeout status bits, these also survive a warm boot,
|
|
* and they work, so we use them.
|
|
*/
|
|
# define TCO_STS_TCO_INT_STS (1 << 1)
|
|
# define TCO_STS_TCO2TO_STS (1 << 10)
|
|
# define TCO_STS_RESET (TCO_STS_BOOT_STS | TCO_STS_TCO2TO_STS | \
|
|
TCO_STS_TCO_INT_STS)
|
|
|
|
#define TCO_CNT(base) ((base) + 0x08) /* TCO Control Register */
|
|
# define TCO_CNT_TCOHALT (1 << 12)
|
|
|
|
#define MCP51_SMBUS_SETUP_B 0xe8
|
|
# define MCP51_SMBUS_SETUP_B_TCO_REBOOT (1 << 25)
|
|
|
|
/*
|
|
* The SMI_EN register is at the base io address + 0x04,
|
|
* while TCOBASE is + 0x40.
|
|
*/
|
|
#define MCP51_SMI_EN(base) ((base) - 0x40 + 0x04)
|
|
# define MCP51_SMI_EN_TCO ((1 << 4) | (1 << 5))
|