1b886d83cSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 205454c26SKuppuswamy Sathyanarayanan /* 305454c26SKuppuswamy Sathyanarayanan * intel-mid.c: Intel MID platform setup code 405454c26SKuppuswamy Sathyanarayanan * 505454c26SKuppuswamy Sathyanarayanan * (C) Copyright 2008, 2012 Intel Corporation 605454c26SKuppuswamy Sathyanarayanan * Author: Jacob Pan (jacob.jun.pan@intel.com) 705454c26SKuppuswamy Sathyanarayanan * Author: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@intel.com> 805454c26SKuppuswamy Sathyanarayanan */ 905454c26SKuppuswamy Sathyanarayanan 10712b6aa8SKuppuswamy Sathyanarayanan #define pr_fmt(fmt) "intel_mid: " fmt 1105454c26SKuppuswamy Sathyanarayanan 1205454c26SKuppuswamy Sathyanarayanan #include <linux/init.h> 1305454c26SKuppuswamy Sathyanarayanan #include <linux/kernel.h> 1405454c26SKuppuswamy Sathyanarayanan #include <linux/interrupt.h> 15a11836faSAndy Shevchenko #include <linux/regulator/machine.h> 1605454c26SKuppuswamy Sathyanarayanan #include <linux/scatterlist.h> 1705454c26SKuppuswamy Sathyanarayanan #include <linux/irq.h> 18cc3ae7b0SPaul Gortmaker #include <linux/export.h> 1905454c26SKuppuswamy Sathyanarayanan #include <linux/notifier.h> 2005454c26SKuppuswamy Sathyanarayanan 2105454c26SKuppuswamy Sathyanarayanan #include <asm/setup.h> 2205454c26SKuppuswamy Sathyanarayanan #include <asm/mpspec_def.h> 2305454c26SKuppuswamy Sathyanarayanan #include <asm/hw_irq.h> 2405454c26SKuppuswamy Sathyanarayanan #include <asm/apic.h> 2505454c26SKuppuswamy Sathyanarayanan #include <asm/io_apic.h> 2605454c26SKuppuswamy Sathyanarayanan #include <asm/intel-mid.h> 2705454c26SKuppuswamy Sathyanarayanan #include <asm/io.h> 2805454c26SKuppuswamy Sathyanarayanan #include <asm/i8259.h> 2905454c26SKuppuswamy Sathyanarayanan #include <asm/intel_scu_ipc.h> 3005454c26SKuppuswamy Sathyanarayanan #include <asm/reboot.h> 3105454c26SKuppuswamy Sathyanarayanan 32*6517da7aSAndy Shevchenko #define IPCMSG_COLD_OFF 0x80 /* Only for Tangier */ 33*6517da7aSAndy Shevchenko #define IPCMSG_COLD_RESET 0xF1 34*6517da7aSAndy Shevchenko 35712b6aa8SKuppuswamy Sathyanarayanan enum intel_mid_cpu_type __intel_mid_cpu_chip; 36712b6aa8SKuppuswamy Sathyanarayanan EXPORT_SYMBOL_GPL(__intel_mid_cpu_chip); 3705454c26SKuppuswamy Sathyanarayanan 3885611e3fSKuppuswamy Sathyanarayanan static void intel_mid_power_off(void) 3985611e3fSKuppuswamy Sathyanarayanan { 40bda7b072SAndy Shevchenko /* Shut down South Complex via PWRMU */ 41bda7b072SAndy Shevchenko intel_mid_pwr_power_off(); 42bda7b072SAndy Shevchenko 43bda7b072SAndy Shevchenko /* Only for Tangier, the rest will ignore this command */ 44*6517da7aSAndy Shevchenko intel_scu_ipc_dev_simple_command(NULL, IPCMSG_COLD_OFF, 1); 4585611e3fSKuppuswamy Sathyanarayanan }; 4685611e3fSKuppuswamy Sathyanarayanan 47712b6aa8SKuppuswamy Sathyanarayanan static void intel_mid_reboot(void) 4805454c26SKuppuswamy Sathyanarayanan { 49*6517da7aSAndy Shevchenko intel_scu_ipc_dev_simple_command(NULL, IPCMSG_COLD_RESET, 0); 5005454c26SKuppuswamy Sathyanarayanan } 5105454c26SKuppuswamy Sathyanarayanan 52712b6aa8SKuppuswamy Sathyanarayanan static void __init intel_mid_time_init(void) 5305454c26SKuppuswamy Sathyanarayanan { 546648d1b4SThomas Gleixner /* Lapic only, no apbt */ 5505454c26SKuppuswamy Sathyanarayanan x86_init.timers.setup_percpu_clockev = setup_boot_APIC_clock; 5605454c26SKuppuswamy Sathyanarayanan x86_cpuinit.setup_percpu_clockev = setup_secondary_APIC_clock; 5705454c26SKuppuswamy Sathyanarayanan } 5805454c26SKuppuswamy Sathyanarayanan 59aeeca404SPaul Gortmaker static void intel_mid_arch_setup(void) 6005454c26SKuppuswamy Sathyanarayanan { 6185611e3fSKuppuswamy Sathyanarayanan if (boot_cpu_data.x86 != 6) { 6205454c26SKuppuswamy Sathyanarayanan pr_err("Unknown Intel MID CPU (%d:%d), default to Penwell\n", 6305454c26SKuppuswamy Sathyanarayanan boot_cpu_data.x86, boot_cpu_data.x86_model); 64712b6aa8SKuppuswamy Sathyanarayanan __intel_mid_cpu_chip = INTEL_MID_CPU_CHIP_PENWELL; 6585611e3fSKuppuswamy Sathyanarayanan goto out; 6605454c26SKuppuswamy Sathyanarayanan } 6785611e3fSKuppuswamy Sathyanarayanan 6885611e3fSKuppuswamy Sathyanarayanan switch (boot_cpu_data.x86_model) { 6985611e3fSKuppuswamy Sathyanarayanan case 0x35: 7085611e3fSKuppuswamy Sathyanarayanan __intel_mid_cpu_chip = INTEL_MID_CPU_CHIP_CLOVERVIEW; 7185611e3fSKuppuswamy Sathyanarayanan break; 72bc20aa48SDavid Cohen case 0x3C: 73bc20aa48SDavid Cohen case 0x4A: 74bc20aa48SDavid Cohen __intel_mid_cpu_chip = INTEL_MID_CPU_CHIP_TANGIER; 7541afb1dfSAndy Shevchenko x86_platform.legacy.rtc = 1; 76bc20aa48SDavid Cohen break; 7785611e3fSKuppuswamy Sathyanarayanan case 0x27: 7885611e3fSKuppuswamy Sathyanarayanan default: 7985611e3fSKuppuswamy Sathyanarayanan __intel_mid_cpu_chip = INTEL_MID_CPU_CHIP_PENWELL; 8085611e3fSKuppuswamy Sathyanarayanan break; 8185611e3fSKuppuswamy Sathyanarayanan } 8285611e3fSKuppuswamy Sathyanarayanan 8385611e3fSKuppuswamy Sathyanarayanan out: 84a11836faSAndy Shevchenko /* 85a11836faSAndy Shevchenko * Intel MID platforms are using explicitly defined regulators. 86a11836faSAndy Shevchenko * 87a11836faSAndy Shevchenko * Let the regulator core know that we do not have any additional 88a11836faSAndy Shevchenko * regulators left. This lets it substitute unprovided regulators with 89a11836faSAndy Shevchenko * dummy ones: 90a11836faSAndy Shevchenko */ 91a11836faSAndy Shevchenko regulator_has_full_constraints(); 9205454c26SKuppuswamy Sathyanarayanan } 9305454c26SKuppuswamy Sathyanarayanan 9405454c26SKuppuswamy Sathyanarayanan /* 9505454c26SKuppuswamy Sathyanarayanan * Moorestown does not have external NMI source nor port 0x61 to report 9605454c26SKuppuswamy Sathyanarayanan * NMI status. The possible NMI sources are from pmu as a result of NMI 9705454c26SKuppuswamy Sathyanarayanan * watchdog or lock debug. Reading io port 0x61 results in 0xff which 9805454c26SKuppuswamy Sathyanarayanan * misled NMI handler. 9905454c26SKuppuswamy Sathyanarayanan */ 100712b6aa8SKuppuswamy Sathyanarayanan static unsigned char intel_mid_get_nmi_reason(void) 10105454c26SKuppuswamy Sathyanarayanan { 10205454c26SKuppuswamy Sathyanarayanan return 0; 10305454c26SKuppuswamy Sathyanarayanan } 10405454c26SKuppuswamy Sathyanarayanan 10505454c26SKuppuswamy Sathyanarayanan /* 10605454c26SKuppuswamy Sathyanarayanan * Moorestown specific x86_init function overrides and early setup 10705454c26SKuppuswamy Sathyanarayanan * calls. 10805454c26SKuppuswamy Sathyanarayanan */ 109712b6aa8SKuppuswamy Sathyanarayanan void __init x86_intel_mid_early_setup(void) 11005454c26SKuppuswamy Sathyanarayanan { 11105454c26SKuppuswamy Sathyanarayanan x86_init.resources.probe_roms = x86_init_noop; 11205454c26SKuppuswamy Sathyanarayanan x86_init.resources.reserve_resources = x86_init_noop; 11305454c26SKuppuswamy Sathyanarayanan 114712b6aa8SKuppuswamy Sathyanarayanan x86_init.timers.timer_init = intel_mid_time_init; 11505454c26SKuppuswamy Sathyanarayanan x86_init.timers.setup_percpu_clockev = x86_init_noop; 11605454c26SKuppuswamy Sathyanarayanan 11705454c26SKuppuswamy Sathyanarayanan x86_init.irqs.pre_vector_init = x86_init_noop; 11805454c26SKuppuswamy Sathyanarayanan 119712b6aa8SKuppuswamy Sathyanarayanan x86_init.oem.arch_setup = intel_mid_arch_setup; 12005454c26SKuppuswamy Sathyanarayanan 121712b6aa8SKuppuswamy Sathyanarayanan x86_platform.get_nmi_reason = intel_mid_get_nmi_reason; 12205454c26SKuppuswamy Sathyanarayanan 123a912a758SAndy Shevchenko x86_init.pci.arch_init = intel_mid_pci_init; 12405454c26SKuppuswamy Sathyanarayanan x86_init.pci.fixup_irqs = x86_init_noop; 12505454c26SKuppuswamy Sathyanarayanan 12605454c26SKuppuswamy Sathyanarayanan legacy_pic = &null_legacy_pic; 12705454c26SKuppuswamy Sathyanarayanan 12802428742SAndy Shevchenko /* 12902428742SAndy Shevchenko * Do nothing for now as everything needed done in 13002428742SAndy Shevchenko * x86_intel_mid_early_setup() below. 13102428742SAndy Shevchenko */ 13202428742SAndy Shevchenko x86_init.acpi.reduced_hw_early_init = x86_init_noop; 13302428742SAndy Shevchenko 134712b6aa8SKuppuswamy Sathyanarayanan pm_power_off = intel_mid_power_off; 135712b6aa8SKuppuswamy Sathyanarayanan machine_ops.emergency_restart = intel_mid_reboot; 13605454c26SKuppuswamy Sathyanarayanan 13705454c26SKuppuswamy Sathyanarayanan /* Avoid searching for BIOS MP tables */ 13805454c26SKuppuswamy Sathyanarayanan x86_init.mpparse.find_smp_config = x86_init_noop; 13905454c26SKuppuswamy Sathyanarayanan x86_init.mpparse.get_smp_config = x86_init_uint_noop; 14005454c26SKuppuswamy Sathyanarayanan set_bit(MP_BUS_ISA, mp_bus_not_pci); 14105454c26SKuppuswamy Sathyanarayanan } 142