code:
---
title: How to install FreeBSD on a libreboot system
...

This section relates to preparing, booting and installing FreeBSD on
your libreboot system, using nothing more than a USB flash drive (and
*dd*). They've only been tested on a Lenovo ThinkPad x200.

It is expected that you use text mode in libreboot (txtmode images), for
the early boot process in FreeBSD. **Booting the installer results in a
red flickering text display, and doesn't boot.**

Thanks go to ioxcide in [this Reddit
post](https://www.reddit.com/r/BSD/comments/53jt70/libreboot_and_bsds/)
for the initial instructions.

TODO: test FreeBSD more extensively, and make sure it works (and fix it
if it does not). Instructions are provided here, to boot and install
FreeBSD but we're not sure whether it is currently fully compatible
with libreboot.

-   [Prepare the USB drive (in FreeBSD)](#prepare)
-   [Installing FreeBSD without full disk encryption](#noencryption)
-   [Installing FreeBSD with full disk encryption](#encryption)
-   [Booting](#booting)
-   [Configuring Grub](#configuring_grub)
-   [Troubleshooting](#troubleshooting)

**This section is only for the GRUB payload. For depthcharge (used on
CrOS devices in libreboot), instructions have yet to be written in the
libreboot documentation.**

freebsd.img is the installation image for FreeBSD. Adapt the filename
accordingly, for whatever FreeBSD version you use.

Prepare the USB drive (in FreeBSD)
----------------------------------

[This page](https://www.freebsd.org/doc/handbook/bsdinstall-pre.html) on
the FreeBSD website shows how to create a bootable USB drive for
installing FreeBSD. Use the *dd* on that page.

Prepare the USB drive (in NetBSD)
---------------------------------

[This
page](https://wiki.netbsd.org/tutorials/how_to_install_netbsd_from_an_usb_memory_stick/)
on the NetBSD website shows how to create a NetBSD bootable USB drive
from within NetBSD itself. You should use the *dd* method documented
there; you can use this with any ISO, including FreeBSD.

Prepare the USB drive (in LibertyBSD or OpenBSD)
------------------------------------------------

If you downloaded your ISO on a LibertyBSD or OpenBSD system, here is
how to create the bootable FreeBSD USB drive:

Connect the USB drive. Check dmesg:

    $ dmesg | tail

Check to confirm which drive it is, for example, if you think its sd3:

    $ disklabel sd3

Check that it wasn't automatically mounted. If it was, unmount it. For
example:

    $ doas umount /dev/sd3i

dmesg told you what device it is. Overwrite the drive, writing the
FreeBSD installer to it with dd. For example:

    $ doas dd if=freebsd.img of=/dev/rsdXc bs=1M; sync

You should now be able to boot the installer from your USB drive.
Continue reading, for information about how to do that.

Prepare the USB drive (in GNU+Linux)
------------------------------------

If you downloaded your ISO on a GNU+Linux system, here is how to create
the bootable FreeBSD USB drive:

Connect the USB drive. Check dmesg:

    $ dmesg
Check lsblk to confirm which drive it is:

    $ lsblk

Check that it wasn't automatically mounted. If it was, unmount it. For
example:

    $ sudo umount /dev/sdX\*
    # umount /dev/sdX\*

dmesg told you what device it is. Overwrite the drive, writing your
distro ISO to it with dd. For example:

    $ sudo dd if=freebsd.img of=/dev/sdX bs=8M; sync
    # dd if=freebsd.img of=/dev/sdX bs=8M; sync

You should now be able to boot the installer from your USB drive.
Continue reading, for information about how to do that.

Installing FreeBSD without full disk encryption
-----------------------------------------------

Press C in GRUB to access the command line:

    grub> kfreebsd (usb0,gpt3)/boot/kernel/kernel
    grub> set FreeBSD.vfs.mountfrom=ufs:/dev/da1p3\
    grub> boot

It will start booting into the FreeBSD installer. Follow the normal
process for installing FreeBSD.

Installing FreeBSD with full disk encryption
--------------------------------------------

TODO

Booting
-------

TODO

Configuring Grub
----------------

TODO

Troubleshooting
===============

Most of these issues occur when using libreboot with coreboot's 'text
mode' instead of the coreboot framebuffer. This mode is useful for
booting payloads like memtest86+ which expect text-mode, but for FreeBSD
it can be problematic when they are trying to switch to a framebuffer
because it doesn't exist.

In most cases, you should use the vesafb ROM images. Example filename:
libreboot\_ukdvorak\_vesafb.rom.

won't boot\...something about file not found
---------------------------------------------

Your device names (i.e. usb0, usb1, sd0, sd1, wd0, ahci0, hd0, etc) and
numbers may differ. Use TAB completion.

Copyright © 2016 Leah Rowe <info@minifree.org>\
Copyright © 2016 Scott Bonds <scott@ggr.com>\
This page is available under the [CC BY SA 4.0](../cc-by-sa-4.0.txt)


code:
---
title: BSD projects
...

This section relates to dealing with BSD projects: preparing bootable
USB drives, changing the default GRUB menu and so on.

**This section is only for the \*GRUB\* payload. For depthcharge,
instructions have yet to be written.**

-   [How to install NetBSD on a libreboot system](netbsd.html)
-   [How to install LibertyBSD or OpenBSD on a libreboot
    system](openbsd.html)

-   [How to install FreeBSD on a libreboot system](freebsd.html)

Copyright © 2016 Scott Bonds <scott@ggr.com>\
This page is available under the [CC BY SA 4.0](../cc-by-sa-4.0.txt)

repo_name: libreboot/obsolete

license: mit


code:
---
title: How to install NetBSD on a libreboot system
...

This section relates to preparing, booting and installing NetBSD on your
libreboot system, using nothing more than a USB flash drive (and *dd*).
They've only been tested on a librebooted ThinkPad X60.

It is expected that you use text mode in libreboot (txtmode images), for
the early boot process in NetBSD. **Suspend/hibernate is broken,
according to at least 1 user.**

Thanks go to ioxcide in [this Reddit
post](https://www.reddit.com/r/BSD/comments/53jt70/libreboot_and_bsds/)
for the initial instructions.

-   [Prepare the USB drive (in NetBSD)](#prepare)
-   [Installing NetBSD without full disk encryption](#noencryption)
-   [Installing NetBSD with full disk encryption](#encryption)
-   [Booting](#booting)
-   [Configuring Grub](#configuring_grub)
-   [Troubleshooting](#troubleshooting)

**This section is only for the GRUB payload. For depthcharge (used on
CrOS devices in libreboot), instructions have yet to be written in the
libreboot documentation.**

netbsd.iso is the installation image for NetBSD. Adapt the filename
accordingly, for your version of NetBSD.

Prepare the USB drive (in NetBSD)
---------------------------------

[This
page](https://wiki.netbsd.org/tutorials/how_to_install_netbsd_from_an_usb_memory_stick/)
on the NetBSD website shows how to create a NetBSD bootable USB drive
from within NetBSD itself. You should use the *dd* method documented
there.

Prepare the USB drive (in FreeBSD)
----------------------------------

[This page](https://www.freebsd.org/doc/handbook/bsdinstall-pre.html) on
the FreeBSD website shows how to create a bootable USB drive for
installing FreeBSD. Use the *dd* on that page. You can also use the same
instructions with a NetBSD ISO image.

Prepare the USB drive (in LibertyBSD or NetBSD)
-----------------------------------------------

If you downloaded your ISO on a LibertyBSD or NetBSD system, here is how
to create the bootable NetBSD USB drive:

Connect the USB drive. Check dmesg:

    $ dmesg | tail

Check to confirm which drive it is, for example, if you think its sd3:

    $ disklabel sd3

Check that it wasn't automatically mounted. If it was, unmount it. For
example:

    $ doas umount /dev/sd3i

dmesg told you what device it is. Overwrite the drive, writing the
NetBSD installer to it with dd. For example:

    $ doas netbsd.iso of=/dev/rsdXc bs=1M; sync

You should now be able to boot the installer from your USB drive.
Continue reading, for information about how to do that.

Prepare the USB drive (in GNU+Linux)
------------------------------------

If you downloaded your ISO on a GNU+Linux system, here is how to create
the bootable NetBSD USB drive:

Connect the USB drive. Check dmesg:

    $ dmesg
Check lsblk to confirm which drive it is:

    $ lsblk

Check that it wasn't automatically mounted. If it was, unmount it. For
example:

    $ sudo umount /dev/sdX\*
    # umount /dev/sdX\*

dmesg told you what device it is. Overwrite the drive, writing your
distro ISO to it with dd. For example:

    $ sudo dd if=install60.fs of=/dev/sdX bs=8M; sync
    # dd if=netbsd.iso of=/dev/sdX bs=8M; sync

You should now be able to boot the installer from your USB drive.
Continue reading, for information about how to do that.

Installing NetBSD without full disk encryption
----------------------------------------------

You might have to use an external USB keyboard during the installation.
Press C to access the GRUB terminal.

    grub> knetbsd -r sd0a (usb0,netbsd1)/netbsd
    grub> boot

It will start booting into the NetBSD installer. Follow the normal
process for installing NetBSD.

Installing NetBSD with full disk encryption
-------------------------------------------

TODO

Booting
-------

Press C in GRUB to access the command line:

    grub> knetbsd -r wd0a (ahci0,netbsd1)/netbsd
    grub> boot

NetBSD will start booting. Yay!

Configuring Grub
----------------

If you don't want to drop to the GRUB command line and type in a
command to boot NetBSD every time, you can create a GRUB configuration
that's aware of your NetBSD installation and that will automatically be
used by libreboot.

On your NetBSD root partition, create the **/grub** directory and add
the file **libreboot\_grub.cfg** to it. Inside the
**libreboot\_grub.cfg** add these lines:

**default=0 timeout=3 menuentry "NetBSD" {\
    knetbsd -r wd0a (ahci0,netbsd1)/netbsd\
}\
**

The next time you boot, you'll see the old Grub menu for a few seconds,
then you'll see the a new menu with only NetBSD on the list. After 3
seconds NetBSD will boot, or you can hit enter to boot.

Troubleshooting
===============

Most of these issues occur when using libreboot with coreboot's 'text
mode' instead of the coreboot framebuffer. This mode is useful for
booting payloads like memtest86+ which expect text-mode, but for NetBSD
it can be problematic when they are trying to switch to a framebuffer
because it doesn't exist.

In most cases, you should use the vesafb ROM images. Example filename:
libreboot\_ukdvorak\_vesafb.rom.

won't boot\...something about file not found
---------------------------------------------

Your device names (i.e. usb0, usb1, sd0, sd1, wd0, ahci0, hd0, etc) and
numbers may differ. Use TAB completion.

Copyright © 2016 Leah Rowe <info@minifree.org>\
Copyright © 2016 Scott Bonds <scott@ggr.com>\
This page is available under the [CC BY SA 4.0](../cc-by-sa-4.0.txt)


code:
---
title: How to install LibertyBSD or OpenBSD on a libreboot system
...

NOTE: This guide was written for OpenBSD by the person who contributed
it, but the libreboot project recommends LibertyBSD. LibertyBSD is a
version of OpenBSD without proprietary software in the repositories
(OpenBSD distributes firmware blobs for devices inside its kernel). Go
to the [LibertyBSD website](http://libertybsd.net/) -- TODO: test on
LibertyBSD and prioritise that in this guide.

This section relates to preparing, booting and installing OpenBSD on
your libreboot system, using nothing more than a USB flash drive (and
*dd*). They've only been tested on a Lenovo ThinkPad x200.

-   [Prepare the USB drive (in OpenBSD)](#prepare)
-   [Installing OpenBSD without full disk encryption](#noencryption)
-   [Installing OpenBSD with full disk encryption](#encryption)
-   [Booting](#booting)
-   [Configuring Grub](#configuring_grub)
-   [Troubleshooting](#troubleshooting)

**This section is only for the GRUB payload. For depthcharge (used on
CrOS devices in libreboot), instructions have yet to be written in the
libreboot documentation.**

install60.fs is the installation image for OpenBSD 6.0. Adapt the
filename accordingly, for a different OpenBSD version or LibertyBSD.

Prepare the USB drive (in LibertyBSD or OpenBSD)
------------------------------------------------

If you downloaded your ISO on a LibertyBSD or OpenBSD system, here is
how to create the bootable LibertyBSD/OpenBSD USB drive:

Connect the USB drive. Check dmesg:

    $ dmesg | tail

Check to confirm which drive it is, for example, if you think its sd3:

    $ disklabel sd3

Check that it wasn't automatically mounted. If it was, unmount it. For
example:

    $ doas umount /dev/sd3i

dmesg told you what device it is. Overwrite the drive, writing the
OpenBSD installer to it with dd. For example:

    $ doas dd if=install60.fs of=/dev/rsdXc bs=1M; sync

You should now be able to boot the installer from your USB drive.
Continue reading, for information about how to do that.

Prepare the USB drive (in NetBSD)
---------------------------------

[This
page](https://wiki.netbsd.org/tutorials/how_to_install_netbsd_from_an_usb_memory_stick/)
on the NetBSD website shows how to create a NetBSD bootable USB drive
from within NetBSD itself. You should use the *dd* method documented
there. This will also work with the OpenBSD image.

Prepare the USB drive (in FreeBSD)
----------------------------------

[This page](https://www.freebsd.org/doc/handbook/bsdinstall-pre.html) on
the FreeBSD website shows how to create a bootable USB drive for
installing FreeBSD. Use the *dd* on that page. You can also use the same
instructions with a OpenBSD ISO image.

Prepare the USB drive (in GNU+Linux)
------------------------------------

If you downloaded your ISO on a GNU+Linux system, here is how to create
the bootable OpenBSD USB drive:

Connect the USB drive. Check dmesg:

    $ dmesg
Check lsblk to confirm which drive it is:

    $ lsblk

Check that it wasn't automatically mounted. If it was, unmount it. For
example:

    $ sudo umount /dev/sdX\*
    # umount /dev/sdX\*

dmesg told you what device it is. Overwrite the drive, writing your
distro ISO to it with dd. For example:

    $ sudo dd if=install60.fs of=/dev/sdX bs=8M; sync
    # dd if=install60.fs of=/dev/sdX bs=8M; sync

You should now be able to boot the installer from your USB drive.
Continue reading, for information about how to do that.

Installing OpenBSD without full disk encryption
-----------------------------------------------

Press C in GRUB to access the command line:

    grub> kopenbsd (usb0,openbsd1)/6.0/amd64/bsd.rd
    grub> boot

It will start booting into the OpenBSD installer. Follow the normal
process for installing OpenBSD.

Installing OpenBSD with full disk encryption
--------------------------------------------

Not working. You can modify the above procedure (installation w/o
encryption) to install OpenBSD using full disk encryption, and it
appears to work, except that its not yet clear how to actually *boot* an
OpenBSD+FDE installation using libreboot+Grub2. If you get it working,
please let us know.

If booting in text mode (framebuffer mode might also work), it might be
possible to chainload the OpenBSD or LibertyBSD bootloader from the MBR
section on the internal storage device. This way, it would be possible
to boot with an encrypted OpenBSD or LibertyBSD installation. Please let
us know (contact details are on the libreboot homepage) if you get it
working this way.

Alternatively, it would be good to port OpenBSD either natively as a
coreboot payload, or port it to libpayload (payload library in coreboot;
it has a basic C library and a few functions for certain operations e.g.
text/bitmap). **This would be ideal, because then it would be possible
to boot a truly fully encrypted OpenBSD or LibertyBSD installation, by
putting everything in the flash chip.**

Alternatively, modifying GRUB to support booting fully encrypted OpenBSD
installations would be possible, but probably not feasible; it's an
alien codebase to the OpenBSD project, not tightly integrated and the
OpenBSD bootloader already works.

Booting
-------

Press C in GRUB to access the command line:

    grub> kopenbsd -r sd0a (ahci0,openbsd1)/bsd
    grub> boot

OpenBSD will start booting. Yay!

Configuring Grub
----------------

If you don't want to drop to the GRUB command line and type in a
command to boot OpenBSD every time, you can create a GRUB configuration
that's aware of your OpenBSD installation and that will automatically
be used by libreboot.

On your OpenBSD root partition, create the **/grub** directory and add
the file **libreboot\_grub.cfg** to it. Inside the
**libreboot\_grub.cfg** add these lines:

**default=0 timeout=3 menuentry "OpenBSD" {\
    kopenbsd -r sd0a (ahci0,openbsd1)/bsd\
}\
**

The next time you boot, you'll see the old Grub menu for a few seconds,
then you'll see the a new menu with only OpenBSD on the list. After 3
seconds OpenBSD will boot, or you can hit enter to boot.

Troubleshooting
===============

Most of these issues occur when using libreboot with coreboot's 'text
mode' instead of the coreboot framebuffer. This mode is useful for
booting payloads like memtest86+ which expect text-mode, but for OpenBSD
it can be problematic when they are trying to switch to a framebuffer
because it doesn't exist.

In most cases, you should use the vesafb ROM images. Example filename:
libreboot\_ukdvorak\_vesafb.rom.

won't boot\...something about file not found
---------------------------------------------

Your device names (i.e. usb0, usb1, sd0, sd1, wd0, ahci0, hd0, etc) and
numbers may differ. Use TAB completion.

Copyright © 2016 Scott Bonds <scott@ggr.com>\
Copyright © 2016 Leah Rowe <info@minifree.org>\
This page is available under the [CC BY SA 4.0](../cc-by-sa-4.0.txt)


code:
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code:
---
title: Depthcharge payload
...

This section relates to the depthcharge payload used in libreboot.

-   [CrOS security model](#cros_security_model)
-   [Developer mode screen](#developer_mode_screen)
    -   Holding the developer mode screen
    -   Booting normally
    -   Booting from different mediums
    -   Showing device information
    -   Warnings

-   [Recovery mode screen](#recovery_mode_screen)
    -   [Recovering from a bad state](#recovering_bad_state)
    -   [Enabling developer mode](#enabling_developer_mode)
-   [Configuring verified boot
    parameters](#configuring_verified_boot_parameters)

CrOS security model {#cros_security_model}
===================

CrOS (Chromium OS/Chrome OS) devices such as Chromebooks implement a
strict security model to ensure that these devices do not become
compromised, that is implemented as the verified boot (vboot) reference,
most of which is executed within depthcharge. A detailed overview of the
CrOS security model is available on the dedicated page.

In spite of the CrOS security model, depthcharge won't allow booting
kernels without verifying their signature and booting from external
media or legacy payload unless explicitly allowed: see [configuring
verified boot parameters](#configuring_verified_boot_parameters).

Developer mode screen {#developer_mode_screen}
=====================

The developer mode screen can be accessed in depthcharge when developer
mode is enabled.\
Developer mode can be enabled from the [recovery mode
screen](#recovery_mode_screen).

It allows booting normally, booting from internal storage, booting from
external media (when enabled), booting from legacy payload (when
enabled), showing information about the device and disabling developer
mode.

Holding the developer mode screen {#holding_developer_mode_screen}
---------------------------------

As instructed on the developer mode screen, the screen can be held by
pressing **Ctrl + H** in the first 3 seconds after the screen is shown.
After that delay, depthcharge will resume booting normally.

Booting normally {#booting_normally}
----------------

As instructed on the developer mode screen, a regular boot will happen
after **3 seconds** (if developer mode screen is not held).\
The default boot medium (internal storage, external media, legacy
payload) is shown on screen.

Booting from different mediums {#booting_different_mediums}
------------------------------

Depthcharge allows booting from different mediums, when they are allowed
(see [configuring verified boot
parameters](#configuring_verified_boot_parameters) to enable or disable
boot mediums).\
As instructed on the developer mode screen, booting from various mediums
can be triggered by pressing various key combinations:

-   Internal storage: **Ctrl + D**
-   External media: **Ctrl + U** (when enabled)
-   Legacy payload: **Ctrl + L** (when enabled)

Showing device information {#showing_device_information}
--------------------------

As instructed on the developer mode screen, showing device information
can be triggered by pressing **Ctrl + I** or **Tab**.\
Various information is shown, including vboot non-volatile data, TPM
status, GBB flags and key hashes.\

Warnings
--------

The developer mode screen will show warnings when:

-   Booting kernels without verifying their signature is enabled
-   Booting from external media is enabled
-   Booting legacy payloads is enabled

Recovery mode screen {#recovery_mode_screen}
====================

The recovery mode screen can be accessed in depthcharge, by pressing
**Escape + Refresh + Power** when the device is off.

It allows recovering the device from a bad state by booting from a
trusted recovery media. When accessed with the device in a good state,
it also allows enabling developer mode.

Recovering from a bad state {#recovering_bad_state}
---------------------------

When the device fails to verify the signature of a piece of the boot
software or when an error occurs, it is considered to be in a bad state
and will instruct the user to reboot to recovery mode.\
Recovery mode boots using only software located in write-protected
memory, that is considered to be trusted and safe.

Recovery mode then allows recovering the device by booting from a
trusted recovery media, that is automatically detected when recovery
mode starts. When no external media is found or when the recovery media
is invalid, instructions are shown on screen.\
Trusted recovery media are external media (USB drives, SD cards, etc)
that hold a kernel signed with the recovery key.

Google provides images of such recovery media for Chrome OS (which are
not advised to users as they contain proprietary software).\
They are signed with Google's recovery keys, that are pre-installed on
the device when it ships.

When replacing the full flash of the device, the pre-installed keys are
replaced. When the recovery private key is available (e.g. when using
self-generated keys), it can be used to sign a kernel for recovery
purposes.

Enabling developer mode {#enabling_developer_mode}
-----------------------

As instructed on the recovery mode screen, developer mode can be enabled
by pressing **Ctrl + D**.\
Instructions to confirm enabling developer mode are then shown on
screen.

Configuring verified boot parameters {#configuring_verified_boot_parameters}
====================================

Depthcharge's behavior relies on the verified boot (vboot) reference
implementation, that can be configured with parameters stored in the
verified boot non-volatile storage.\
These parameters can be modified with the **crossystem** tool, that
requires sufficient privileges to access the verified boot non-volatile
storage.

**crossystem** relies on **mosys**, that is used to access the verified
boot non-volatile storage on some devices. **crossystem** and **mosys**
are both free software and their source code is made available by
Google:
[crossystem](https://chromium.googlesource.com/chromiumos/platform/vboot_reference/).
[mosys](https://chromium.googlesource.com/chromiumos/platform/mosys/).\
These tools are not distributed along with Libreboot yet. However, they
are preinstalled on the device, with ChromeOS.

Some of these parameters have the potential of **weakening the security
of the device**. In particular, disabling kernels signature
verification, external media boot and legacy payload boot can weaken the
security of the device.

The following parameters can be configured:

-   Kernels signature verification:
    -   Enabled with:

        \# **crossystem dev\_boot\_signed\_only=1**
    -   Disabled with:

        \# **crossystem dev\_boot\_signed\_only=0**
-   External media boot:
    -   Enabled with:

        \# **crossystem dev\_boot\_usb=1**
    -   Disabled with:

        \# **crossystem dev\_boot\_usb=0**
-   Legacy payload boot:
    -   Enabled with:

        \# **crossystem dev\_boot\_legacy=1**
    -   Disabled with:

        \# **crossystem dev\_boot\_legacy=0**
-   Default boot medium:
    -   Internal storage:

        \# **crossystem dev\_default\_boot=disk**
    -   External media:

        \# **crossystem dev\_default\_boot=usb**
    -   Legacy payload:

        \# **crossystem dev\_default\_boot=legacy**

Copyright © 2015 Paul Kocialkowski <contact@paulk.fr>\
This page is available under the [CC BY SA 4.0](../cc-by-sa-4.0.txt)


code:
diff --git a/src/mainboard/apple/macbook21/mainboard.c b/src/mainboard/apple/macbook21/mainboard.c
index 9a025dd..a2adb76 100644
--- a/src/mainboard/apple/macbook21/mainboard.c
+++ b/src/mainboard/apple/macbook21/mainboard.c
@@ -40,6 +40,12 @@
 extern const u32 *cim_verb_data;
 extern u32 cim_verb_data_size;

+static acpi_cstate_t cst_entries[] = {
+        { 1,  1, 1000, { 0x7f, 1, 2, { 0 }, 1, 0 } },
+        { 2,  1,  500, { 0x01, 8, 0, { 0 }, DEFAULT_PMBASE + LV2, 0 } },
+        { 2, 17,  250, { 0x01, 8, 0, { 0 }, DEFAULT_PMBASE + LV3, 0 } },
+};
+
 #if CONFIG_PCI_OPTION_ROM_RUN_YABEL || CONFIG_PCI_OPTION_ROM_RUN_REALMODE
 static int int15_handler(void)
 {
@@ -73,7 +79,8 @@ static int int15_handler(void)

 int get_cst_entries(acpi_cstate_t **entries)
 {
-       return 0;
+        *entries = cst_entries;
+        return ARRAY_SIZE(cst_entries);
 }

 static void mainboard_init(device_t dev)


code:
/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2008-2009 coresystems GmbH
 *
 * 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.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <console/console.h>
#include <bootmode.h>
#include <delay.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <pc80/mc146818rtc.h>
#include "i945.h"
#include "chip.h"
#include <edid.h>
#include <drivers/intel/gma/edid.h>
#include <drivers/intel/gma/i915.h>
#include <string.h>

#define GDRST 0xc0

#define  LVDS_CLOCK_A_POWERUP_ALL	(3 << 8)
#define  LVDS_CLOCK_B_POWERUP_ALL	(3 << 4)
#define  LVDS_CLOCK_BOTH_POWERUP_ALL	(3 << 2)
#define   DISPPLANE_BGRX888			(0x6<<26)
#define   DPLLB_LVDS_P2_CLOCK_DIV_7	(1 << 24) /* i915 */

#define   DPLL_INTEGRATED_CRI_CLK_VLV	(1<<14)

#define PGETBL_CTL	0x2020
#define PGETBL_ENABLED	0x00000001

#define BASE_FREQUENCY 120000

#if CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT

static int gtt_setup(unsigned int mmiobase)
{
	unsigned long PGETBL_save;

	PGETBL_save = read32(mmiobase + PGETBL_CTL) & ~PGETBL_ENABLED;
	PGETBL_save |= PGETBL_ENABLED;

	PGETBL_save |= pci_read_config32(dev_find_slot(0, PCI_DEVFN(2,0)), 0x5c) & 0xfffff000;
	PGETBL_save |= 2; /* set GTT to 256kb */

	// hack!!!
	PGETBL_save += 0x7c0000; // ugly hack. from 5927/3. Must calculate it properly!
	/// hack!!!

	write32(mmiobase + GFX_FLSH_CNTL, 0);

	write32(mmiobase + PGETBL_CTL, PGETBL_save);

	/* verify */
/* // old
	if (read32(mmiobase + PGETBL_CTL) & PGETBL_ENABLED) {
		printk(BIOS_DEBUG, "gtt_setup is enabled.\n");
*/
	// Hack. Must do properly later:
	PGETBL_save = read32(mmiobase + PGETBL_CTL);
	if (PGETBL_save & PGETBL_ENABLED) {
		printk(BIOS_DEBUG, "gtt_setup is enabled: GTT PGETLB_CTL register: 0x%lx\n", PGETBL_save);
	// end hack
	} else {
		printk(BIOS_DEBUG, "gtt_setup failed!!!\n");
		return 1;
	}
	write32(mmiobase + GFX_FLSH_CNTL, 0);

	return 0;
}

static int intel_gma_init(struct northbridge_intel_i945_config *conf,
			  unsigned int pphysbase, unsigned int piobase,
			  unsigned int pmmio, unsigned int pgfx)
{
	struct edid edid;
	u8 edid_data[128];
	unsigned long temp;
	int hpolarity, vpolarity;
	u32 candp1, candn;
	u32 best_delta = 0xffffffff;
	u32 target_frequency;
	u32 pixel_p1 = 1;
	u32 pixel_n = 1;
	u32 pixel_m1 = 1;
	u32 pixel_m2 = 1;
	u32 hactive, vactive, right_border, bottom_border;
	u32 vsync, hsync, vblank, hblank, hfront_porch, vfront_porch;
	u32 i, j;

	pphysbase += 0x20000;

	printk(BIOS_SPEW,
	       "i915lightup: graphics %p mmio %08x addrport %04x physbase %08x\n",
	       (void *)pgfx, pmmio, piobase, pphysbase);

	intel_gmbus_read_edid(pmmio + GMBUS0, 3, 0x50, edid_data, 128);
	decode_edid(edid_data, sizeof(edid_data), &edid);

	hpolarity = (edid.phsync == '-');
	vpolarity = (edid.pvsync == '-');
	hactive = edid.x_resolution;
	vactive = edid.y_resolution;
	right_border = edid.hborder;
	bottom_border = edid.vborder;
	vblank = edid.vbl;
	hblank = edid.hbl;
	vsync = edid.vspw;
	hsync = edid.hspw;
	hfront_porch = edid.hso;
	vfront_porch = edid.vso;

	for (i = 0; i < 2; i++)
		for (j = 0; j < 0x100; j++)
			/* R=j, G=j, B=j.  */
			write32(pmmio + PALETTE(i) + 4 * j, 0x10101 * j);

	write32(pmmio + PCH_PP_CONTROL, PANEL_UNLOCK_REGS
		| (read32(pmmio + PCH_PP_CONTROL) & ~PANEL_UNLOCK_MASK));

	write32(pmmio + MI_ARB_STATE, MI_ARB_C3_LP_WRITE_ENABLE | (1 << 27));
	/* Clean registers.  */
	for (i = 0; i < 0x20; i += 4)
		write32(pmmio + RENDER_RING_BASE + i, 0);
	for (i = 0; i < 0x20; i += 4)
		write32(pmmio + FENCE_REG_965_0 + i, 0);
	write32(pmmio + PP_ON_DELAYS, 0);
	write32(pmmio + PP_OFF_DELAYS, 0);

	/* Disable VGA.  */
	write32(pmmio + VGACNTRL, VGA_DISP_DISABLE);

	/* Disable pipes.  */
	write32(pmmio + PIPECONF(0), 0);
	write32(pmmio + PIPECONF(1), 0);

	/* Init PRB0.  */
	write32(pmmio + HWS_PGA, 0x352d2000);
	write32(pmmio + PRB0_CTL, 0);
	write32(pmmio + PRB0_HEAD, 0);
	write32(pmmio + PRB0_TAIL, 0);
	write32(pmmio + PRB0_START, 0);
	write32(pmmio + PRB0_CTL, 0x0001f001);

	write32(pmmio + D_STATE, DSTATE_PLL_D3_OFF
		| DSTATE_GFX_CLOCK_GATING | DSTATE_DOT_CLOCK_GATING);
	write32(pmmio + ECOSKPD, 0x00010000);
	write32(pmmio + HWSTAM, 0xeffe);
	write32(pmmio + PORT_HOTPLUG_EN, conf->gpu_hotplug);
	write32(pmmio + INSTPM, 0x08000000 | INSTPM_AGPBUSY_DIS);

	target_frequency = conf->gpu_lvds_is_dual_channel ? edid.pixel_clock
		: (2 * edid.pixel_clock);

	/* Find suitable divisors.  */
	for (candp1 = 1; candp1 <= 8; candp1++) {
		for (candn = 5; candn <= 10; candn++) {
			u32 cur_frequency;
			u32 m; /* 77 - 131.  */
			u32 denom; /* 35 - 560.  */
			u32 current_delta;

			denom = candn * candp1 * 7;
			/* Doesnt overflow for up to
			   5000000 kHz = 5 GHz.  */
			m = (target_frequency * denom
			     + BASE_FREQUENCY / 2) / BASE_FREQUENCY;

			if (m < 77 || m > 131)
				continue;

			cur_frequency = (BASE_FREQUENCY * m) / denom;
			if (target_frequency > cur_frequency)
				current_delta = target_frequency - cur_frequency;
			else
				current_delta = cur_frequency - target_frequency;

			if (best_delta > current_delta) {
				best_delta = current_delta;
				pixel_n = candn;
				pixel_p1 = candp1;
				pixel_m2 = ((m + 3) % 5) + 7;
				pixel_m1 = (m - pixel_m2) / 5;
			}
		}
	}

	if (best_delta == 0xffffffff) {
		printk (BIOS_ERR, "Couldn't find GFX clock divisors\n");
		return -1;
	}

	printk(BIOS_INFO, "bringing up panel at resolution %d x %d\n",
	       hactive, vactive);
	printk(BIOS_DEBUG, "Borders %d x %d\n", right_border, bottom_border);
	printk(BIOS_DEBUG, "Blank %d x %d\n", hblank, vblank);
	printk(BIOS_DEBUG, "Sync %d x %d\n", hsync, vsync);
	printk(BIOS_DEBUG, "Front porch %d x %d\n", hfront_porch, vfront_porch);
	printk(BIOS_DEBUG, (conf->gpu_lvds_use_spread_spectrum_clock
			    ? "Spread spectrum clock\n"
			    : "DREF clock\n"));
	printk(BIOS_DEBUG, (conf->gpu_lvds_is_dual_channel
			    ? "Dual channel\n"
			    : "Single channel\n"));
	printk(BIOS_DEBUG, "Polarities %d, %d\n",
	       hpolarity, vpolarity);
	printk(BIOS_DEBUG, "Pixel N=%d, M1=%d, M2=%d, P1=%d\n",
	       pixel_n, pixel_m1, pixel_m2, pixel_p1);
	printk(BIOS_DEBUG, "Pixel clock %d kHz\n",
	       BASE_FREQUENCY * (5 * pixel_m1 + pixel_m2) / pixel_n
	       / (pixel_p1 * 7));

	write32(pmmio + DSPCNTR(0), DISPPLANE_BGRX888
		| DISPPLANE_SEL_PIPE_B | DISPPLANE_GAMMA_ENABLE);

	mdelay(1);
	write32(pmmio + PP_CONTROL, PANEL_UNLOCK_REGS
		| (read32(pmmio + PP_CONTROL) & ~PANEL_UNLOCK_MASK));
	write32(pmmio + FP0(1),
		((pixel_n - 2) << 16)
		| ((pixel_m1 - 2) << 8) | pixel_m2);
	write32(pmmio + DPLL(1),
		DPLL_VGA_MODE_DIS |
		DPLL_VCO_ENABLE | DPLLB_MODE_LVDS
		| (conf->gpu_lvds_is_dual_channel ? DPLLB_LVDS_P2_CLOCK_DIV_7
		   : DPLLB_LVDS_P2_CLOCK_DIV_14)
		| (conf->gpu_lvds_use_spread_spectrum_clock
		   ? DPLL_INTEGRATED_CLOCK_VLV | DPLL_INTEGRATED_CRI_CLK_VLV
		   : 0)
		| (pixel_p1 << 16)
		| (pixel_p1));
	mdelay(1);
	write32(pmmio + DPLL(1),
		DPLL_VGA_MODE_DIS |
		DPLL_VCO_ENABLE | DPLLB_MODE_LVDS
		| (conf->gpu_lvds_is_dual_channel ? DPLLB_LVDS_P2_CLOCK_DIV_7
		   : DPLLB_LVDS_P2_CLOCK_DIV_14)
		| ((conf->gpu_lvds_use_spread_spectrum_clock ? 3 : 0) << 13)
		| (pixel_p1 << 16)
		| (pixel_p1));
	mdelay(1);
	write32(pmmio + HTOTAL(1),
		((hactive + right_border + hblank - 1) << 16)
		| (hactive - 1));
	write32(pmmio + HBLANK(1),
		((hactive + right_border + hblank - 1) << 16)
		| (hactive + right_border - 1));
	write32(pmmio + HSYNC(1),
		((hactive + right_border + hfront_porch + hsync - 1) << 16)
		| (hactive + right_border + hfront_porch - 1));

	write32(pmmio + VTOTAL(1), ((vactive + bottom_border + vblank - 1) << 16)
		| (vactive - 1));
	write32(pmmio + VBLANK(1), ((vactive + bottom_border + vblank - 1) << 16)
		| (vactive + bottom_border - 1));
	write32(pmmio + VSYNC(1),
		(vactive + bottom_border + vfront_porch + vsync - 1)
		| (vactive + bottom_border + vfront_porch - 1));

	write32(pmmio + PIPESRC(1), ((hactive - 1) << 16) | (vactive - 1));

	/* Disable panel fitter (we're in native resolution).  */
	write32(pmmio + PF_CTL(0), 0);
	write32(pmmio + PF_WIN_SZ(0), 0);
	write32(pmmio + PF_WIN_POS(0), 0);
	write32(pmmio + PFIT_PGM_RATIOS, 0);
	write32(pmmio + PFIT_CONTROL, 0);

	mdelay(1);

	write32(pmmio + DSPSIZE(0), (hactive - 1) | ((vactive - 1) << 16));
	write32(pmmio + DSPPOS(0), 0);

	/* Backlight init. */
	write32(pmmio + FW_BLC_SELF, FW_BLC_SELF_EN_MASK);
	write32(pmmio + FW_BLC, 0x011d011a);
	write32(pmmio + FW_BLC2, 0x00000102);
	write32(pmmio + FW_BLC_SELF, FW_BLC_SELF_EN_MASK);
	write32(pmmio + FW_BLC_SELF, 0x0001003f);
	write32(pmmio + FW_BLC, 0x011d0109);
	write32(pmmio + FW_BLC2, 0x00000102);
	write32(pmmio + FW_BLC_SELF, FW_BLC_SELF_EN_MASK);
	write32(pmmio + BLC_PWM_CTL, conf->gpu_backlight);

	edid.bytes_per_line = (edid.bytes_per_line + 63) & ~63;
	write32(pmmio + DSPADDR(0), 0);
	write32(pmmio + DSPSURF(0), 0);
	write32(pmmio + DSPSTRIDE(0), edid.bytes_per_line);
	write32(pmmio + DSPCNTR(0), DISPLAY_PLANE_ENABLE | DISPPLANE_BGRX888
		| DISPPLANE_SEL_PIPE_B | DISPPLANE_GAMMA_ENABLE);
	mdelay(1);

	write32(pmmio + PIPECONF(1), PIPECONF_ENABLE);
	write32(pmmio + LVDS, LVDS_ON
		| (hpolarity << 20) | (vpolarity << 21)
		| (conf->gpu_lvds_is_dual_channel ? LVDS_CLOCK_B_POWERUP_ALL
		   | LVDS_CLOCK_BOTH_POWERUP_ALL : 0)
		| LVDS_CLOCK_A_POWERUP_ALL
		| LVDS_PIPE(1));

	write32(pmmio + PP_CONTROL, PANEL_UNLOCK_REGS | PANEL_POWER_OFF);
	write32(pmmio + PP_CONTROL, PANEL_UNLOCK_REGS | PANEL_POWER_RESET);
	mdelay(1);
	write32(pmmio + PP_CONTROL, PANEL_UNLOCK_REGS
		| PANEL_POWER_ON | PANEL_POWER_RESET);

	printk (BIOS_DEBUG, "waiting for panel powerup\n");
	while (1) {
		u32 reg32;
		reg32 = read32(pmmio + PP_STATUS);
		if ((reg32 & PP_SEQUENCE_MASK) == PP_SEQUENCE_NONE)
			break;
	}
	printk (BIOS_DEBUG, "panel powered up\n");

	write32(pmmio + PP_CONTROL, PANEL_POWER_ON | PANEL_POWER_RESET);

	/* Clear interrupts. */
	write32(pmmio + DEIIR, 0xffffffff);
	write32(pmmio + SDEIIR, 0xffffffff);
	write32(pmmio + IIR, 0xffffffff);
	write32(pmmio + IMR, 0xffffffff);
	write32(pmmio + EIR, 0xffffffff);

	/* GTT is the Global Translation Table for the graphics pipeline.
	 * It is used to translate graphics addresses to physical
	 * memory addresses. As in the CPU, GTTs map 4K pages.
	 * There are 32 bits per pixel, or 4 bytes,
	 * which means 1024 pixels per page.
	 * There are 4250 GTTs on Link:
	 * 2650 (X) * 1700 (Y) pixels / 1024 pixels per page.
	 * The setgtt function adds a further bit of flexibility:
	 * it allows you to set a range (the first two parameters) to point
	 * to a physical address (third parameter);the physical address is
	 * incremented by a count (fourth parameter) for each GTT in the
	 * range.
	 * Why do it this way? For ultrafast startup,
	 * we can point all the GTT entries to point to one page,
	 * and set that page to 0s:
	 * memset(physbase, 0, 4096);
	 * setgtt(0, 4250, physbase, 0);
	 * this takes about 2 ms, and is a win because zeroing
	 * the page takes a up to 200 ms. We will be exploiting this
	 * trick in a later rev of this code.
	 * This call sets the GTT to point to a linear range of pages
	 * starting at physbase.
	 */

	if (gtt_setup(pmmio)) {
		printk(BIOS_ERR, "ERROR: GTT Setup Failed!!!\n");
		return 0;
	}

	/* Setup GTT.  */
	for (i = 0; i < 0x2000; i++)
	{
		outl((i << 2) | 1, piobase);
		outl(pphysbase + (i << 12) + 1, piobase + 4);
	}

	temp = read32(pmmio + PGETBL_CTL);
	printk(BIOS_INFO, "GTT PGETBL_CTL register: 0x%lx\n", temp);

	if (temp & 1)
		printk(BIOS_INFO, "GTT Enabled\n");
	else
		printk(BIOS_ERR, "ERROR: GTT is still Disabled!!!\n");

	printk(BIOS_SPEW, "memset %p to 0x00 for %d bytes\n",
	       (void *)pgfx, hactive * vactive * 4);
	memset((void *)pgfx, 0x00, hactive * vactive * 4);

	set_vbe_mode_info_valid(&edid, pgfx);

	return 0;
}
#endif

static void gma_func0_init(struct device *dev)
{
	u32 reg32;

	/* Unconditionally reset graphics */
	pci_write_config8(dev, GDRST, 1);
	udelay(50);
	pci_write_config8(dev, GDRST, 0);
	/* wait for device to finish */
	while (pci_read_config8(dev, GDRST) & 1) { };

	/* IGD needs to be Bus Master */
	reg32 = pci_read_config32(dev, PCI_COMMAND);
	pci_write_config32(dev, PCI_COMMAND, reg32 | PCI_COMMAND_MASTER
		 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY);

#if !CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT
	/* PCI Init, will run VBIOS */
	pci_dev_init(dev);
#endif

#if CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT
	/* This should probably run before post VBIOS init. */
	printk(BIOS_SPEW, "Initializing VGA without OPROM.\n");
	u32 iobase, mmiobase, graphics_base;
	struct northbridge_intel_i945_config *conf = dev->chip_info;

	iobase = dev->resource_list[1].base;
	mmiobase = dev->resource_list[0].base;
	graphics_base = dev->resource_list[2].base;

	printk(BIOS_SPEW, "GMADR=0x%08x GTTADR=0x%08x\n",
		pci_read_config32(dev, 0x18),
		pci_read_config32(dev, 0x1c)
	);

		int err;
	err = intel_gma_init(conf, pci_read_config32(dev, 0x5c) & ~0xf,
			     iobase, mmiobase, graphics_base);
	if (err == 0)
		gfx_set_init_done(1);
#endif
}

/* This doesn't reclaim stolen UMA memory, but IGD could still
   be reenabled later. */
static void gma_func0_disable(struct device *dev)
{
	struct device *dev_host = dev_find_slot(0, PCI_DEVFN(0x0, 0));

	pci_write_config16(dev, GCFC, 0xa00);
	pci_write_config16(dev_host, GGC, (1 << 1));

	unsigned int reg32 = pci_read_config32(dev_host, DEVEN);
	reg32 &= ~(DEVEN_D2F0 | DEVEN_D2F1);
	pci_write_config32(dev_host, DEVEN, reg32);

	dev->enabled = 0;
}

static void gma_func1_init(struct device *dev)
{
	u32 reg32;
	u8 val;

	/* IGD needs to be Bus Master, also enable IO accesss */
	reg32 = pci_read_config32(dev, PCI_COMMAND);
	pci_write_config32(dev, PCI_COMMAND, reg32 |
			PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO);

	if (get_option(&val, "tft_brightness") == CB_SUCCESS)
		pci_write_config8(dev, 0xf4, val);
	else
		pci_write_config8(dev, 0xf4, 0xff);
}

static void gma_set_subsystem(device_t dev, unsigned vendor, unsigned device)
{
	if (!vendor || !device) {
		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
				pci_read_config32(dev, PCI_VENDOR_ID));
	} else {
		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
				((device & 0xffff) << 16) | (vendor & 0xffff));
	}
}

static struct pci_operations gma_pci_ops = {
	.set_subsystem    = gma_set_subsystem,
};

static struct device_operations gma_func0_ops = {
	.read_resources		= pci_dev_read_resources,
	.set_resources		= pci_dev_set_resources,
	.enable_resources	= pci_dev_enable_resources,
	.init			= gma_func0_init,
	.scan_bus		= 0,
	.enable			= 0,
	.disable		= gma_func0_disable,
	.ops_pci		= &gma_pci_ops,
};

static struct device_operations gma_func1_ops = {
	.read_resources		= pci_dev_read_resources,
	.set_resources		= pci_dev_set_resources,
	.enable_resources	= pci_dev_enable_resources,
	.init			= gma_func1_init,
	.scan_bus		= 0,
	.enable			= 0,
	.ops_pci		= &gma_pci_ops,
};

static const struct pci_driver i945_gma_func0_driver __pci_driver = {
	.ops	= &gma_func0_ops,
	.vendor	= PCI_VENDOR_ID_INTEL,
	.device	= 0x27a2,
};

static const struct pci_driver i945_gma_func1_driver __pci_driver = {
	.ops	= &gma_func1_ops,
	.vendor	= PCI_VENDOR_ID_INTEL,
	.device	= 0x27a6,
};