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/*
             LUFA Library
     Copyright (C) Dean Camera, 2017.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/

/*
  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
  software without specific, written prior permission.

  The author disclaims all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/** \file
 *  \brief LUFA Library Configuration Header File
 *
 *  This header file is used to configure LUFA's compile time options,
 *  as an alternative to the compile time constants supplied through
 *  a makefile.
 *
 *  For information on what each token does, refer to the LUFA
 *  manual section "Summary of Compile Tokens".
 */

#ifndef _LUFA_CONFIG_H_
#define _LUFA_CONFIG_H_

	#if (ARCH == ARCH_AVR8)

		/* Non-USB Related Configuration Tokens: */
//		#define DISABLE_TERMINAL_CODES

		/* USB Class Driver Related Tokens: */
//		#define HID_HOST_BOOT_PROTOCOL_ONLY
//		#define HID_STATETABLE_STACK_DEPTH       {Insert Value Here}
//		#define HID_USAGE_STACK_DEPTH            {Insert Value Here}
//		#define HID_MAX_COLLECTIONS              {Insert Value Here}
//		#define HID_MAX_REPORTITEMS              {Insert Value Here}
//		#define HID_MAX_REPORT_IDS               {Insert Value Here}
//		#define NO_CLASS_DRIVER_AUTOFLUSH

		/* General USB Driver Related Tokens: */
//		#define ORDERED_EP_CONFIG
		#define USE_STATIC_OPTIONS               (USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)
//		#define USB_DEVICE_ONLY
		#define USB_HOST_ONLY
//		#define USB_STREAM_TIMEOUT_MS            {Insert Value Here}
//		#define NO_LIMITED_CONTROLLER_CONNECT
//		#define NO_SOF_EVENTS

		/* USB Device Mode Driver Related Tokens: */
//		#define USE_RAM_DESCRIPTORS
//		#define USE_FLASH_DESCRIPTORS
//		#define USE_EEPROM_DESCRIPTORS
//		#define NO_INTERNAL_SERIAL
//		#define FIXED_CONTROL_ENDPOINT_SIZE      {Insert Value Here}
//		#define DEVICE_STATE_AS_GPIOR            {Insert Value Here}
//		#define FIXED_NUM_CONFIGURATIONS         {Insert Value Here}
//		#define CONTROL_ONLY_DEVICE
//		#define INTERRUPT_CONTROL_ENDPOINT
//		#define NO_DEVICE_REMOTE_WAKEUP
//		#define NO_DEVICE_SELF_POWER

		/* USB Host Mode Driver Related Tokens: */
//		#define HOST_STATE_AS_GPIOR              {Insert Value Here}
//		#define USB_HOST_TIMEOUT_MS              {Insert Value Here}
//		#define HOST_DEVICE_SETTLE_DELAY_MS	     {Insert Value Here}
//		#define NO_AUTO_VBUS_MANAGEMENT
//		#define INVERTED_VBUS_ENABLE_LINE

	#else

		#error Unsupported architecture for this LUFA configuration file.

	#endif
#endif
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/*
 *  acpi_tables.c - ACPI Boot-Time Table Parsing
 *
 *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 */

#include <linux/config.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/irq.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/bootmem.h>

#define PREFIX			"ACPI: "

#define ACPI_MAX_TABLES		128

static char *acpi_table_signatures[ACPI_TABLE_COUNT] = {
	[ACPI_TABLE_UNKNOWN] = "????",
	[ACPI_APIC] = "APIC",
	[ACPI_BOOT] = "BOOT",
	[ACPI_DBGP] = "DBGP",
	[ACPI_DSDT] = "DSDT",
	[ACPI_ECDT] = "ECDT",
	[ACPI_ETDT] = "ETDT",
	[ACPI_FADT] = "FACP",
	[ACPI_FACS] = "FACS",
	[ACPI_OEMX] = "OEM",
	[ACPI_PSDT] = "PSDT",
	[ACPI_SBST] = "SBST",
	[ACPI_SLIT] = "SLIT",
	[ACPI_SPCR] = "SPCR",
	[ACPI_SRAT] = "SRAT",
	[ACPI_SSDT] = "SSDT",
	[ACPI_SPMI] = "SPMI",
	[ACPI_HPET] = "HPET",
	[ACPI_MCFG] = "MCFG",
};

static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };

/* System Description Table (RSDT/XSDT) */
struct acpi_table_sdt {
	unsigned long pa;
	enum acpi_table_id id;
	unsigned long size;
} __attribute__ ((packed));

static unsigned long sdt_pa;	/* Physical Address */
static unsigned long sdt_count;	/* Table count */

static struct acpi_table_sdt sdt_entry[ACPI_MAX_TABLES] __initdata;

void acpi_table_print(struct acpi_table_header *header, unsigned long phys_addr)
{
	char *name = NULL;

	if (!header)
		return;

	/* Some table signatures aren't good table names */

	if (!strncmp((char *)&header->signature,
		     acpi_table_signatures[ACPI_APIC],
		     sizeof(header->signature))) {
		name = "MADT";
	} else if (!strncmp((char *)&header->signature,
			    acpi_table_signatures[ACPI_FADT],
			    sizeof(header->signature))) {
		name = "FADT";
	} else
		name = header->signature;

	printk(KERN_DEBUG PREFIX
	       "%.4s (v%3.3d %6.6s %8.8s 0x%08x %.4s 0x%08x) @ 0x%p\n", name,
	       header->revision, header->oem_id, header->oem_table_id,
	       header->oem_revision, header->asl_compiler_id,
	       header->asl_compiler_revision, (void *)phys_addr);
}

void acpi_table_print_madt_entry(acpi_table_entry_header * header)
{
	if (!header)
		return;

	switch (header->type) {

	case ACPI_MADT_LAPIC:
		{
			struct acpi_table_lapic *p =
			    (struct acpi_table_lapic *)header;
			printk(KERN_INFO PREFIX
			       "LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
			       p->acpi_id, p->id,
			       p->flags.enabled ? "enabled" : "disabled");
		}
		break;

	case ACPI_MADT_IOAPIC:
		{
			struct acpi_table_ioapic *p =
			    (struct acpi_table_ioapic *)header;
			printk(KERN_INFO PREFIX
			       "IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
			       p->id, p->address, p->global_irq_base);
		}
		break;

	case ACPI_MADT_INT_SRC_OVR:
		{
			struct acpi_table_int_src_ovr *p =
			    (struct acpi_table_int_src_ovr *)header;
			printk(KERN_INFO PREFIX
			       "INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
			       p->bus, p->bus_irq, p->global_irq,
			       mps_inti_flags_polarity[p->flags.polarity],
			       mps_inti_flags_trigger[p->flags.trigger]);
			if (p->flags.reserved)
				printk(KERN_INFO PREFIX
				       "INT_SRC_OVR unexpected reserved flags: 0x%x\n",
				       p->flags.reserved);

		}
		break;

	case ACPI_MADT_NMI_SRC:
		{
			struct acpi_table_nmi_src *p =
			    (struct acpi_table_nmi_src *)header;
			printk(KERN_INFO PREFIX
			       "NMI_SRC (%s %s global_irq %d)\n",
			       mps_inti_flags_polarity[p->flags.polarity],
			       mps_inti_flags_trigger[p->flags.trigger],
			       p->global_irq);
		}
		break;

	case ACPI_MADT_LAPIC_NMI:
		{
			struct acpi_table_lapic_nmi *p =
			    (struct acpi_table_lapic_nmi *)header;
			printk(KERN_INFO PREFIX
			       "LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
			       p->acpi_id,
			       mps_inti_flags_polarity[p->flags.polarity],
			       mps_inti_flags_trigger[p->flags.trigger],
			       p->lint);
		}
		break;

	case ACPI_MADT_LAPIC_ADDR_OVR:
		{
			struct acpi_table_lapic_addr_ovr *p =
			    (struct acpi_table_lapic_addr_ovr *)header;
			printk(KERN_INFO PREFIX
			       "LAPIC_ADDR_OVR (address[%p])\n",
			       (void *)(unsigned long)p->address);
		}
		break;

	case ACPI_MADT_IOSAPIC:
		{
			struct acpi_table_iosapic *p =
			    (struct acpi_table_iosapic *)header;
			printk(KERN_INFO PREFIX
			       "IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
			       p->id, (void *)(unsigned long)p->address,
			       p->global_irq_base);
		}
		break;

	case ACPI_MADT_LSAPIC:
		{
			struct acpi_table_lsapic *p =
			    (struct acpi_table_lsapic *)header;
			printk(KERN_INFO PREFIX
			       "LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
			       p->acpi_id, p->id, p->eid,
			       p->flags.enabled ? "enabled" : "disabled");
		}
		break;

	case ACPI_MADT_PLAT_INT_SRC:
		{
			struct acpi_table_plat_int_src *p =
			    (struct acpi_table_plat_int_src *)header;
			printk(KERN_INFO PREFIX
			       "PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
			       mps_inti_flags_polarity[p->flags.polarity],
			       mps_inti_flags_trigger[p->flags.trigger],
			       p->type, p->id, p->eid, p->iosapic_vector,
			       p->global_irq);
		}
		break;

	default:
		printk(KERN_WARNING PREFIX
		       "Found unsupported MADT entry (type = 0x%x)\n",
		       header->type);
		break;
	}
}

static int
acpi_table_compute_checksum(void *table_pointer, unsigned long length)
{
	u8 *p = (u8 *) table_pointer;
	unsigned long remains = length;
	unsigned long sum = 0;

	if (!p || !length)
		return -EINVAL;

	while (remains--)
		sum += *p++;

	return (sum & 0xFF);
}

/*
 * acpi_get_table_header_early()
 * for acpi_blacklisted(), acpi_table_get_sdt()
 */
int __init
acpi_get_table_header_early(enum acpi_table_id id,
			    struct acpi_table_header **header)
{
	unsigned int i;
	enum acpi_table_id temp_id;

	/* DSDT is different from the rest */
	if (id == ACPI_DSDT)
		temp_id = ACPI_FADT;
	else
		temp_id = id;

	/* Locate the table. */

	for (i = 0; i < sdt_count; i++) {
		if (sdt_entry[i].id != temp_id)
			continue;
		*header = (void *)
		    __acpi_map_table(sdt_entry[i].pa, sdt_entry[i].size);
		if (!*header) {
			printk(KERN_WARNING PREFIX "Unable to map %s\n",
			       acpi_table_signatures[temp_id]);
			return -ENODEV;
		}
		break;
	}

	if (!*header) {
		printk(KERN_WARNING PREFIX "%s not present\n",
		       acpi_table_signatures[id]);
		return -ENODEV;
	}

	/* Map the DSDT header via the pointer in the FADT */
	if (id == ACPI_DSDT) {
		struct fadt_descriptor_rev2 *fadt =
		    (struct fadt_descriptor_rev2 *)*header;

		if (fadt->revision == 3 && fadt->Xdsdt) {
			*header = (void *)__acpi_map_table(fadt->Xdsdt,
							   sizeof(struct
								  acpi_table_header));
		} else if (fadt->V1_dsdt) {
			*header = (void *)__acpi_map_table(fadt->V1_dsdt,
							   sizeof(struct
								  acpi_table_header));
		} else
			*header = NULL;

		if (!*header) {
			printk(KERN_WARNING PREFIX "Unable to map DSDT\n");
			return -ENODEV;
		}
	}

	return 0;
}

int __init
acpi_table_parse_madt_family(enum acpi_table_id id,
			     unsigned long madt_size,
			     int entry_id,
			     acpi_madt_entry_handler handler,
			     unsigned int max_entries)
{
	void *madt = NULL;
	acpi_table_entry_header *entry;
	unsigned int count = 0;
	unsigned long madt_end;
	unsigned int i;

	if (!handler)
		return -EINVAL;

	/* Locate the MADT (if exists). There should only be one. */

	for (i = 0; i < sdt_count; i++) {
		if (sdt_entry[i].id != id)
			continue;
		madt = (void *)
		    __acpi_map_table(sdt_entry[i].pa, sdt_entry[i].size);
		if (!madt) {
			printk(KERN_WARNING PREFIX "Unable to map %s\n",
			       acpi_table_signatures[id]);
			return -ENODEV;
		}
		break;
	}

	if (!madt) {
		printk(KERN_WARNING PREFIX "%s not present\n",
		       acpi_table_signatures[id]);
		return -ENODEV;
	}

	madt_end = (unsigned long)madt + sdt_entry[i].size;

	/* Parse all entries looking for a match. */

	entry = (acpi_table_entry_header *)
	    ((unsigned long)madt + madt_size);

	while (((unsigned long)entry) + sizeof(acpi_table_entry_header) <
	       madt_end) {
		if (entry->type == entry_id
		    && (!max_entries || count++ < max_entries))
			if (handler(entry, madt_end))
				return -EINVAL;

		entry = (acpi_table_entry_header *)
		    ((unsigned long)entry + entry->length);
	}
	if (max_entries && count > max_entries) {
		printk(KERN_WARNING PREFIX "[%s:0x%02x] ignored %i entries of "
		       "%i found\n", acpi_table_signatures[id], entry_id,
		       count - max_entries, count);
	}

	return count;
}

int __init
acpi_table_parse_madt(enum acpi_madt_entry_id id,
		      acpi_madt_entry_handler handler, unsigned int max_entries)
{
	return acpi_table_parse_madt_family(ACPI_APIC,
					    sizeof(struct acpi_table_madt), id,
					    handler, max_entries);
}

int __init acpi_table_parse(enum acpi_table_id id, acpi_table_handler handler)
{
	int count = 0;
	unsigned int i = 0;

	if (!handler)
		return -EINVAL;

	for (i = 0; i < sdt_count; i++) {
		if (sdt_entry[i].id != id)
			continue;
		count++;
		if (count == 1)
			handler(sdt_entry[i].pa, sdt_entry[i].size);

		else
			printk(KERN_WARNING PREFIX
			       "%d duplicate %s table ignored.\n", count,
			       acpi_table_signatures[id]);
	}

	return count;
}

static int __init acpi_table_get_sdt(struct acpi_table_rsdp *rsdp)
{
	struct acpi_table_header *header = NULL;
	unsigned int i, id = 0;

	if (!rsdp)
		return -EINVAL;

	/* First check XSDT (but only on ACPI 2.0-compatible systems) */

	if ((rsdp->revision >= 2) &&
	    (((struct acpi20_table_rsdp *)rsdp)->xsdt_address)) {

		struct acpi_table_xsdt *mapped_xsdt = NULL;

		sdt_pa = ((struct acpi20_table_rsdp *)rsdp)->xsdt_address;

		/* map in just the header */
		header = (struct acpi_table_header *)
		    __acpi_map_table(sdt_pa, sizeof(struct acpi_table_header));

		if (!header) {
			printk(KERN_WARNING PREFIX
			       "Unable to map XSDT header\n");
			return -ENODEV;
		}

		/* remap in the entire table before processing */
		mapped_xsdt = (struct acpi_table_xsdt *)
		    __acpi_map_table(sdt_pa, header->length);
		if (!mapped_xsdt) {
			printk(KERN_WARNING PREFIX "Unable to map XSDT\n");
			return -ENODEV;
		}
		header = &mapped_xsdt->header;

		if (strncmp(header->signature, "XSDT", 4)) {
			printk(KERN_WARNING PREFIX
			       "XSDT signature incorrect\n");
			return -ENODEV;
		}

		if (acpi_table_compute_checksum(header, header->length)) {
			printk(KERN_WARNING PREFIX "Invalid XSDT checksum\n");
			return -ENODEV;
		}

		sdt_count =
		    (header->length - sizeof(struct acpi_table_header)) >> 3;
		if (sdt_count > ACPI_MAX_TABLES) {
			printk(KERN_WARNING PREFIX
			       "Truncated %lu XSDT entries\n",
			       (sdt_count - ACPI_MAX_TABLES));
			sdt_count = ACPI_MAX_TABLES;
		}

		for (i = 0; i < sdt_count; i++)
			sdt_entry[i].pa = (unsigned long)mapped_xsdt->entry[i];
	}

	/* Then check RSDT */

	else if (rsdp->rsdt_address) {

		struct acpi_table_rsdt *mapped_rsdt = NULL;

		sdt_pa = rsdp->rsdt_address;

		/* map in just the header */
		header = (struct acpi_table_header *)
		    __acpi_map_table(sdt_pa, sizeof(struct acpi_table_header));
		if (!header) {
			printk(KERN_WARNING PREFIX
			       "Unable to map RSDT header\n");
			return -ENODEV;
		}

		/* remap in the entire table before processing */
		mapped_rsdt = (struct acpi_table_rsdt *)
		    __acpi_map_table(sdt_pa, header->length);
		if (!mapped_rsdt) {
			printk(KERN_WARNING PREFIX "Unable to map RSDT\n");
			return -ENODEV;
		}
		header = &mapped_rsdt->header;

		if (strncmp(header->signature, "RSDT", 4)) {
			printk(KERN_WARNING PREFIX
			       "RSDT signature incorrect\n");
			return -ENODEV;
		}

		if (acpi_table_compute_checksum(header, header->length)) {
			printk(KERN_WARNING PREFIX "Invalid RSDT checksum\n");
			return -ENODEV;
		}

		sdt_count =
		    (header->length - sizeof(struct acpi_table_header)) >> 2;
		if (sdt_count > ACPI_MAX_TABLES) {
			printk(KERN_WARNING PREFIX
			       "Truncated %lu RSDT entries\n",
			       (sdt_count - ACPI_MAX_TABLES));
			sdt_count = ACPI_MAX_TABLES;
		}

		for (i = 0; i < sdt_count; i++)
			sdt_entry[i].pa = (unsigned long)mapped_rsdt->entry[i];
	}

	else {
		printk(KERN_WARNING PREFIX
		       "No System Description Table (RSDT/XSDT) specified in RSDP\n");
		return -ENODEV;
	}

	acpi_table_print(header, sdt_pa);

	for (i = 0; i < sdt_count; i++) {

		/* map in just the header */
		header = (struct acpi_table_header *)
		    __acpi_map_table(sdt_entry[i].pa,
				     sizeof(struct acpi_table_header));
		if (!header)
			continue;

		/* remap in the entire table before processing */
		header = (struct acpi_table_header *)
		    __acpi_map_table(sdt_entry[i].pa, header->length);
		if (!header)
			continue;

		acpi_table_print(header, sdt_entry[i].pa);

		if (acpi_table_compute_checksum(header, header->length)) {
			printk(KERN_WARNING "  >>> ERROR: Invalid checksum\n");
			continue;
		}

		sdt_entry[i].size = header->length;

		for (id = 0; id < ACPI_TABLE_COUNT; id++) {
			if (!strncmp((char *)&header->signature,
				     acpi_table_signatures[id],
				     sizeof(header->signature))) {
				sdt_entry[i].id = id;
			}
		}
	}

	/* 
	 * The DSDT is *not* in the RSDT (why not? no idea.) but we want
	 * to print its info, because this is what people usually blacklist
	 * against. Unfortunately, we don't know the phys_addr, so just
	 * print 0. Maybe no one will notice.
	 */
	if (!acpi_get_table_header_early(ACPI_DSDT, &header))
		acpi_table_print(header, 0);

	return 0;
}

/*
 * acpi_table_init()
 *
 * find RSDP, find and checksum SDT/XSDT.
 * checksum all tables, print SDT/XSDT
 * 
 * result: sdt_entry[] is initialized
 */
#if defined(CONFIG_X86_XEN) || defined(CONFIG_X86_64_XEN)
#define acpi_rsdp_phys_to_va(rsdp_phys) isa_bus_to_virt(rsdp_phys)
#else
#define acpi_rsdp_phys_to_va(rsdp_phys) __va(rsdp_phys)
#endif

int __init acpi_table_init(void)
{
	struct acpi_table_rsdp *rsdp = NULL;
	unsigned long rsdp_phys = 0;
	int result = 0;

	/* Locate and map the Root System Description Table (RSDP) */

	rsdp_phys = acpi_find_rsdp();
	if (!rsdp_phys) {
		printk(KERN_ERR PREFIX "Unable to locate RSDP\n");
		return -ENODEV;
	}

	rsdp = (struct acpi_table_rsdp *)acpi_rsdp_phys_to_va(rsdp_phys);
	if (!rsdp) {
		printk(KERN_WARNING PREFIX "Unable to map RSDP\n");
		return -ENODEV;
	}

	printk(KERN_DEBUG PREFIX
	       "RSDP (v%3.3d %6.6s                                ) @ 0x%p\n",
	       rsdp->revision, rsdp->oem_id, (void *)rsdp_phys);

	if (rsdp->revision < 2)
		result =
		    acpi_table_compute_checksum(rsdp,
						sizeof(struct acpi_table_rsdp));
	else
		result =
		    acpi_table_compute_checksum(rsdp,
						((struct acpi20_table_rsdp *)
						 rsdp)->length);

	if (result) {
		printk(KERN_WARNING "  >>> ERROR: Invalid checksum\n");
		return -ENODEV;
	}

	/* Locate and map the System Description table (RSDT/XSDT) */

	if (acpi_table_get_sdt(rsdp))
		return -ENODEV;

	return 0;
}