1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Carsten Langgaard, carstenl@mips.com 4 * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved. 5 */ 6 #include <linux/init.h> 7 #include <linux/ioport.h> 8 #include <linux/pm.h> 9 #include <linux/time.h> 10 11 #include <asm/reboot.h> 12 #include <asm/mach-ar7/ar7.h> 13 #include <asm/mach-ar7/prom.h> 14 15 static void ar7_machine_restart(char *command) 16 { 17 u32 *softres_reg = ioremap(AR7_REGS_RESET + AR7_RESET_SOFTWARE, 1); 18 19 writel(1, softres_reg); 20 } 21 22 static void ar7_machine_halt(void) 23 { 24 while (1) 25 ; 26 } 27 28 static void ar7_machine_power_off(void) 29 { 30 u32 *power_reg = (u32 *)ioremap(AR7_REGS_POWER, 1); 31 u32 power_state = readl(power_reg) | (3 << 30); 32 33 writel(power_state, power_reg); 34 ar7_machine_halt(); 35 } 36 37 const char *get_system_type(void) 38 { 39 u16 chip_id = ar7_chip_id(); 40 u16 titan_variant_id = titan_chip_id(); 41 42 switch (chip_id) { 43 case AR7_CHIP_7100: 44 return "TI AR7 (TNETD7100)"; 45 case AR7_CHIP_7200: 46 return "TI AR7 (TNETD7200)"; 47 case AR7_CHIP_7300: 48 return "TI AR7 (TNETD7300)"; 49 case AR7_CHIP_TITAN: 50 switch (titan_variant_id) { 51 case TITAN_CHIP_1050: 52 return "TI AR7 (TNETV1050)"; 53 case TITAN_CHIP_1055: 54 return "TI AR7 (TNETV1055)"; 55 case TITAN_CHIP_1056: 56 return "TI AR7 (TNETV1056)"; 57 case TITAN_CHIP_1060: 58 return "TI AR7 (TNETV1060)"; 59 } 60 fallthrough; 61 default: 62 return "TI AR7 (unknown)"; 63 } 64 } 65 66 static int __init ar7_init_console(void) 67 { 68 return 0; 69 } 70 console_initcall(ar7_init_console); 71 72 /* 73 * Initializes basic routines and structures pointers, memory size (as 74 * given by the bios and saves the command line. 75 */ 76 void __init plat_mem_setup(void) 77 { 78 unsigned long io_base; 79 80 _machine_restart = ar7_machine_restart; 81 _machine_halt = ar7_machine_halt; 82 pm_power_off = ar7_machine_power_off; 83 84 io_base = (unsigned long)ioremap(AR7_REGS_BASE, 0x10000); 85 if (!io_base) 86 panic("Can't remap IO base!"); 87 set_io_port_base(io_base); 88 89 prom_meminit(); 90 91 printk(KERN_INFO "%s, ID: 0x%04x, Revision: 0x%02x\n", 92 get_system_type(), ar7_chip_id(), ar7_chip_rev()); 93 } 94