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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2013 Gateworks Corporation
*
* Author: Tim Harvey <tharvey@gateworks.com>
*/
#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_SOC = 0x11,
GSC_HWMON_VDD_HIGH = 0x14,
GSC_HWMON_VDD_DDR = 0x17,
GSC_HWMON_VDD_EXT = 0x1a,
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
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