| /* |
| * Copyright (C) 2013 Gateworks Corporation |
| * |
| * Author: Tim Harvey <tharvey@gateworks.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #ifndef __ASSEMBLY__ |
| |
| /* i2c slave addresses */ |
| #define GSC_SC_ADDR 0x20 |
| #define GSC_RTC_ADDR 0x68 |
| #define GSC_HWMON_ADDR 0x29 |
| #define GSC_EEPROM_ADDR 0x51 |
| |
| /* System Controller registers */ |
| enum { |
| GSC_SC_CTRL0 = 0x00, |
| GSC_SC_CTRL1 = 0x01, |
| GSC_SC_STATUS = 0x0a, |
| GSC_SC_FWCRC = 0x0c, |
| GSC_SC_FWVER = 0x0e, |
| }; |
| |
| /* System Controller Control1 bits */ |
| enum { |
| GSC_SC_CTRL1_WDTIME = 4, /* 1 = 60s timeout, 0 = 30s timeout */ |
| GSC_SC_CTRL1_WDEN = 5, /* 1 = enable, 0 = disable */ |
| GSC_SC_CTRL1_WDDIS = 7, /* 1 = disable boot watchdog */ |
| }; |
| |
| /* System Controller Interrupt bits */ |
| enum { |
| GSC_SC_IRQ_PB = 0, /* Pushbutton switch */ |
| GSC_SC_IRQ_SECURE = 1, /* Secure Key erase operation complete */ |
| GSC_SC_IRQ_EEPROM_WP = 2, /* EEPROM write violation */ |
| GSC_SC_IRQ_GPIO = 4, /* GPIO change */ |
| GSC_SC_IRQ_TAMPER = 5, /* Tamper detect */ |
| GSC_SC_IRQ_WATCHDOG = 6, /* Watchdog trip */ |
| GSC_SC_IRQ_PBLONG = 7, /* Pushbutton long hold */ |
| }; |
| |
| /* Hardware Monitor registers */ |
| enum { |
| GSC_HWMON_TEMP = 0x00, |
| GSC_HWMON_VIN = 0x02, |
| GSC_HWMON_VDD_3P3 = 0x05, |
| GSC_HWMON_VBATT = 0x08, |
| GSC_HWMON_VDD_5P0 = 0x0b, |
| GSC_HWMON_VDD_CORE = 0x0e, |
| GSC_HWMON_VDD_HIGH = 0x14, |
| GSC_HWMON_VDD_DDR = 0x17, |
| GSC_HWMON_VDD_SOC = 0x11, |
| GSC_HWMON_VDD_1P8 = 0x1d, |
| GSC_HWMON_VDD_IO2 = 0x20, |
| GSC_HWMON_VDD_2P5 = 0x23, |
| GSC_HWMON_VDD_IO3 = 0x26, |
| GSC_HWMON_VDD_IO4 = 0x29, |
| }; |
| |
| /* |
| * I2C transactions to the GSC are done via these functions which |
| * perform retries in the case of a busy GSC NAK'ing the transaction |
| */ |
| int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len); |
| int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len); |
| int gsc_info(int verbose); |
| int gsc_boot_wd_disable(void); |
| #endif |
| |
