Files
system76-coreboot/src/southbridge/intel/common/pciehp.c
Elyes HAOUAS 4b7202e250 src: Drop unused 'include <device/pciexp.h>'
Change-Id: I9b4d72116a66d5a256659fa82682497ef3481e77
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31924
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
2019-03-16 11:46:38 +00:00

172 lines
4.0 KiB
C

/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Vladimir Serbinenko
*
* 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; version 2 of
* the License.
*
* 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.
*/
#include <string.h>
#include <arch/acpi.h>
#include <arch/acpigen.h>
#include <device/device.h>
#include <device/pci.h>
#include "pciehp.h"
void intel_acpi_pcie_hotplug_generator(u8 *hotplug_map, int port_number)
{
int port;
int have_hotplug = 0;
for (port = 0; port < port_number; port++) {
if (hotplug_map[port]) {
have_hotplug = 1;
}
}
if (!have_hotplug) {
return;
}
for (port = 0; port < port_number; port++) {
if (hotplug_map[port]) {
char scope_name[] = "\\_SB.PCI0.RP0x";
scope_name[sizeof("\\_SB.PCI0.RP0x") - 2] = '1' + port;
acpigen_write_scope(scope_name);
/*
Device (SLOT)
{
Name (_ADR, 0x00)
Method (_RMV, 0, NotSerialized)
{
Return (0x01)
}
}
*/
acpigen_write_device("SLOT");
acpigen_write_name_byte("_ADR", 0x00);
acpigen_write_method("_RMV", 0);
/* ReturnOp */
acpigen_emit_byte (0xa4);
/* One */
acpigen_emit_byte (0x01);
acpigen_pop_len();
acpigen_pop_len();
acpigen_pop_len();
}
}
/* Method (_L01, 0, NotSerialized)
{
If (\_SB.PCI0.RP04.HPCS)
{
Sleep (100)
Store (0x01, \_SB.PCI0.RP04.HPCS)
If (\_SB.PCI0.RP04.PDC)
{
Store (0x01, \_SB.PCI0.RP04.PDC)
Notify (\_SB.PCI0.RP04, 0x00)
}
}
}
*/
acpigen_write_scope("\\_GPE");
acpigen_write_method("_L01", 0);
for (port = 0; port < port_number; port++) {
if (hotplug_map[port]) {
char reg_name[] = "\\_SB.PCI0.RP0x.HPCS";
reg_name[sizeof("\\_SB.PCI0.RP0x") - 2] = '1' + port;
acpigen_emit_byte(0xa0); /* IfOp. */
acpigen_write_len_f();
acpigen_emit_namestring(reg_name);
/* Sleep (100) */
acpigen_emit_byte(0x5b); /* SleepOp. */
acpigen_emit_byte(0x22);
acpigen_write_byte(100);
/* Store (0x01, \_SB.PCI0.RP04.HPCS) */
acpigen_emit_byte(0x70);
acpigen_emit_byte(0x01);
acpigen_emit_namestring(reg_name);
memcpy(reg_name + sizeof("\\_SB.PCI0.RP0x.") - 1, "PDC", 4);
/* If (\_SB.PCI0.RP04.PDC) */
acpigen_emit_byte(0xa0); /* IfOp. */
acpigen_write_len_f();
acpigen_emit_namestring(reg_name);
/* Store (0x01, \_SB.PCI0.RP04.PDC) */
acpigen_emit_byte(0x70);
acpigen_emit_byte(0x01);
acpigen_emit_namestring(reg_name);
reg_name[sizeof("\\_SB.PCI0.RP0x") - 1] = '\0';
/* Notify(\_SB.PCI0.RP04, 0x00) */
acpigen_emit_byte(0x86);
acpigen_emit_namestring(reg_name);
acpigen_emit_byte(0x00);
acpigen_pop_len();
acpigen_pop_len();
}
}
acpigen_pop_len();
acpigen_pop_len();
}
static void slot_dev_read_resources(struct device *dev)
{
struct resource *resource;
resource = new_resource(dev, 0x10);
resource->size = 1 << 23;
resource->align = 22;
resource->gran = 22;
resource->limit = 0xffffffff;
resource->flags |= IORESOURCE_MEM;
resource = new_resource(dev, 0x14);
resource->size = 1 << 23;
resource->align = 22;
resource->gran = 22;
resource->limit = 0xffffffff;
resource->flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH;
resource = new_resource(dev, 0x18);
resource->size = 1 << 12;
resource->align = 12;
resource->gran = 12;
resource->limit = 0xffff;
resource->flags |= IORESOURCE_IO;
}
static struct device_operations slot_dev_ops = {
.read_resources = slot_dev_read_resources,
};
/* Add a dummy device to reserve I/O space for hotpluggable devices. */
void intel_acpi_pcie_hotplug_scan_slot(struct bus *bus)
{
struct device *slot;
struct device_path slot_path = { .type = DEVICE_PATH_NONE };
slot = alloc_dev(bus, &slot_path);
slot->ops = &slot_dev_ops;
}