Commit graph

2103 commits

Author SHA1 Message Date
YuheiOKAWA
d91953cb53 ramips: add support for YUKAI Engineering Inc. BOCCO
BOCCO is a communication robot provided by YUKAI Engineering Inc.

SoC: MT7620A
MEM: 256MB
Flash: 8MB
NAND: 512MB (non support)
Include Sound DAC and AMP.
No Wired Ethernet.

Signed-off-by: YuheiOKAWA <tochiro.srchack@gmail.com>
2018-05-18 11:19:00 +02:00
Koen Vandeputte
e2aa0c3f8b kernel: bump 4.14 to 4.14.41
Refreshed all patches

Dropped upstreamed patches:
522-PCI-aardvark-fix-logic-in-PCI-configuration-read-write-functions.patch
523-PCI-aardvark-set-PIO_ADDR_LS-correctly-in-advk_pcie_rd_conf.patch
525-PCI-aardvark-use-isr1-instead-of-isr0-interrupt-in-legacy-irq-mode.patch
527-PCI-aardvark-fix-PCIe-max-read-request-size-setting.patch

updated patches:
524-PCI-aardvark-set-host-and-device-to-the-same-MAX-payload-size.patch
030-USB-serial-option-fix-dwm-158-3g-modem-interface.patch

Added new ARM64 symbol: CONFIG_ARM64_ERRATUM_1024718

Compile-tested on: cns3xxx, imx6, mvebu (arm64), x86_64
Runtime-tested on: cns3xxx, imx6, x86_64

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
2018-05-18 09:10:46 +02:00
Rosen Penev
fec205f654 ramips: mmc: Sync with staging driver
Mostly whitespace cleanups. Some unneeded code was removed.

MMC init was also moved to the probe function as in
6069bdd

The cleanup commits are over 100, making it hard to do them individually.

Tested on GnuBee PC1 with an SD card being used as swap.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
v2: Fixed compile issue with mt7620
2018-05-18 08:49:52 +02:00
Mathias Kresin
0e9e8d8323 kernel: dwc2: add support for host mode external vbus supply
Backport patch adding support for the vbus-supply devicetree property,
which allows to specific GPIOs (via fixed regulators) to enable
vbus/usb power.

Signed-off-by: Mathias Kresin <dev@kresin.me>
2018-05-17 07:40:19 +02:00
John Crispin
7e15e21766 Revert "ramips: mmc: Sync with staging drivers"
This reverts commit 2d401925b9.

Signed-off-by: John Crispin <john@phrozen.org>
2018-05-15 12:42:40 +02:00
Wei Yongjun
87c254c87e staging: mt7621-eth: fix return value check in mt7621_gsw_probe()
In case of error, the function devm_ioremap_resource() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Fixes: f079b6406348 ("staging: mt7621-eth: add gigabit switch driver (GSW)")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-15 06:46:08 +02:00
Wei Yongjun
edec251870 staging: mt7621-eth: fix return value check in mtk_connect_phy_node()
In case of error, the function of_phy_connect() returns NULL pointer not
ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.

Fixes: e3cbf478f846 ("staging: mt7621-eth: add the drivers core files")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-15 06:45:53 +02:00
Wei Yongjun
c4ae54dfab staging: mt7621-eth: fix return value check in mtk_probe()
In case of error, the function devm_ioremap_resource() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Fixes: e3cbf478f846 ("staging: mt7621-eth: add the drivers core files")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-15 06:45:34 +02:00
Rosen Penev
e07baec9fa ramips: pci: sync with staging driver
This is an amagalmation of two upstream commits dealing with whitespace
and dead code removal. I'm synching instead of having two separate commits
as they go out of order compared to previous commits here.

Tested on GnuBee PC1.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
2018-05-15 06:45:07 +02:00
Rosen Penev
2d401925b9 ramips: mmc: Sync with staging drivers
Mostly whitespace cleanups. Some unneeded code was removed.

MMC init was also moved to the probe function as in
6069bdd087

The cleanup commits are over 100, making it hard to do them individually.

Tested on GnuBee PC1 with an SD card being used as swap.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
2018-05-15 06:44:48 +02:00
Matthias Badaire
a0685deec4 ramips: Add i2c support for mt7620n
I2c is supported on mt7620n like on mt7620a when checking the datasheet

Signed-off-by: Matthias Badaire <mbadaire@gmail.com>
2018-05-15 06:39:46 +02:00
NeilBrown
edea934799 ramips: remove unnecessary resource details.
These resources are extracted from devicetree, so they aren't
needed here.

Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-14 16:24:07 +02:00
NeilBrown
1f78625714 ramips: remove conditional compilation.
Code currently defines:

and then compiles code only if they are defined.
We might want to disable some of these via devicetree one
day, but for now just remove the #defines and the
conditions - all the code for different ports is
easy to identify.

Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-14 16:24:04 +02:00
NeilBrown
5f7396ebef ramips: improve interrupt mapping
As the Interrupts for the PCI adapters are listed in
devicetree we shouldn't need to have them explicit in the code.

The simplest way to do this is to use of_irq_parse_and_map_pci()
and specify an interrupt-map which identifies the different
PCI hosts by bus/slot numbers.
This has the advantage that the hwirq number are mapped to virq
numbers for us, so the ugly hack can go.

Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-14 16:23:59 +02:00
Christian Lütke-Stetzkamp
2ad4daf579 ramips: Remove redundant owner assignment
Remove the owner assignment form the platform driver as
platform_driver_register() already initializes the owner.
Found using coccinelle.

Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-14 16:23:36 +02:00
Rosen Penev
a098a78a33 ramips: Move PCI driver to files directory
This will make it easier to port upstream code.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
2018-05-14 15:55:17 +02:00
Felix Fietkau
6069bdd087 ramips: move mtk-mmc init to probe function to avoid breaking NAND flash
The driver messes with the pin control settings - MMC and NAND are
mutually exclusive

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-05-08 17:56:04 +02:00
Felix Fietkau
f95a4aa565 ramips: clean up the mt7621 nand flash driver hacks, add support for the xiaomi mir3g flash chip
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-05-08 17:56:04 +02:00
Davide Ammirata
004cc22e4e ramips: add support for mqmaker witi 512mb version
Splitted out the dts file and create the new dts for the 256 MByte RAM and
the 512 MB RAM version.

Migrate both versions to the common board detection.

The install the 512 MByte Version on a board running the 256 MByte image,
a forceful sysupgrade with the -F flag is required.

Signed-off-by: Davide Ammirata <list@davidea.it>
2018-05-07 18:54:23 +02:00
Matthias Badaire
5ef79af4f8 ramips: add support for Ravpower WD03
The RavPower WD03 is a battery powered SD card reader and a USB port.

Specifications:
SOC:     MediaTek MT7620N
BATTERY: 6000mah
WLAN:    802.11bgn
LAN:     1x 10/100 Mbps Ethernet
USB:     1x USB 2.0 (Type-A)
RAM:     PM Tech PMD708416CTR-5CN 32 MB
FLASH:   Holtek HT66F40 - 8 MB Flash
LED:     Power button and 4 leds to indicate power level of the
         battery (could not get control of that)
INPUT:   Power, reset button
OTHER:   USB SD-Card reader with card detect on GPIO#42

Tested and working:
 - Ethernet
 - 2.4 GHz WiFi (Correct MAC-address)
 - installation from tftp
 - OpenWRT sysupgrade (Preserving and non-preserving)
 - LEDs
 - Buttons

Installation:
 - Download the sysupgrade image
 - Place it in the root of a clean TFTP server running on your computer.
 - Rename the image to "kernel" — be sure there is no file extension.
 - Plug the WD03 into your computer via ethernet.
 - Set your computer to use 10.10.10.254 as its IP address.
 - With your WD03 shut down, hold down the power button until the first
   white LED lights up.
 - Push and hold the reset button and release the power button. Continue
   holding the reset button for 30 seconds or until it begins searching
   for files on your TFTP server, whichever comes first.
 - The WD03 (10.10.10.128) will look for your computer at 10.10.10.254
   and install the kernel file. Once it has finished installation of the
   kernel file, it will search for a (nonexistent) rootfs file — when it
   begins searching for this file, shut down the WD03 by holding the
   power button normally.
 - Start up your WD03 normally.

Signed-off-by: Matthias Badaire <mbadaire@gmail.com>
2018-05-07 18:54:23 +02:00
John Crispin
6e0ae87a98 ramips: disable spi full duplex on mt7621
Signed-off-by: John Crispin <john@phrozen.org>
2018-05-05 08:25:18 +02:00
Mathias Kresin
91e11bec74 ramips: fix mt7628 eval board pinmux
There is no pinmux group "jtag" for mt7628 and the pinmux driver fails
to load due to the use of the not existing group.

Fixes: FS#1515

Signed-off-by: Mathias Kresin <dev@kresin.me>
2018-04-25 20:33:27 +02:00
Mathias Kresin
d089a5d773 ramips: create image for mt7628 evb board
The image for the EVB board got lost with the merge of the mt7628 and
mt7688 subtargets.

Signed-off-by: Mathias Kresin <dev@kresin.me>
2018-04-23 22:07:22 +02:00
Tobias Wolf
3d800f14a9 ramips: use patch-dtb for F5D8235 V1
The old DTB method (OWRTDTB) is not recognized by the boot process
anymore with 4.9/4.14.

This patch reuses KERNEL_DTB to get a valid DTB applied to the kernel
image.

Signed-off-by: Tobias Wolf <github-NTEO@vplace.de>
2018-04-23 22:07:22 +02:00
Mathias Kresin
74a0d8cd92 build: consolidate fake uImage header build commands
Merge the two existing functions and use a parameter for the type
header field.

It updates the syntax of the former mpc85xx fake ramdisk header
command to be compatible with mkimage from u-boot 2018.03 and fixes the
build error spotted by the build bot.

Signed-off-by: Mathias Kresin <dev@kresin.me>
2018-04-20 20:58:52 +02:00
Felix Fietkau
173d93ea23 ramips: fix locking issues in the ethernet driver
The stats update needs to protect against being interrupted by a tasklet
The u64 stats seqlock needs to be initialized

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-04-17 11:29:31 +02:00
Mathias Kresin
e988b0fe0d ramips: mt7620: fix double use of pins
The pins are used as (LED) GPIOs and can't be used at the same time as
hardware controlled ephy (LED) pins.

Fixes: FS#1500

Signed-off-by: Mathias Kresin <dev@kresin.me>
2018-04-17 08:40:56 +02:00
Stijn Tintel
ec1d7b9461 kernel: bump 4.14 to 4.14.34
Refresh patches.
Update patches that no longer apply:
- backport/313-netfilter-remove-defensive-check-on-malformed-packet.patch
- pending/642-net-8021q-support-hardware-flow-table-offload.patch

Compile-tested: x86/64.
Runtime-tested: x86/64.

Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
2018-04-16 00:22:57 +03:00
Felix Fietkau
31a6ee0219 ramips: remove broken and bogus spinlock in the SPI driver
Based on patch by Neil Brown

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-04-14 20:12:32 +02:00
Felix Fietkau
ceff5d8c82 ramips: add missing unlock in fe_phy_link_adjust
Based on patch by Neil Brown

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-04-14 20:12:32 +02:00
Felix Fietkau
07b4e49abb ramips: fix usb phy compatible string (should fix FS#1489)
In the new USB phy driver, it checks the compatible string before
attempting to iomap its mem resource and do the extra PHY init

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-04-13 13:13:53 +02:00
Mathias Kresin
dda5d9b786 ramips: rename pwm kernel module
With kernel 4.14 the OpenWrt specific module name collides with the
upstream added module for Mediatek ARM Socs.

During addition of preliminary support for kernel 4.14, the config
symbol used by the out of tree driver was already renamed but the ramips
kernel package wasn't updated.

Fix the build error by updating the config and kernel module name for
the kernel package.

Signed-off-by: Mathias Kresin <dev@kresin.me>
2018-04-08 12:35:33 +02:00
Vianney le Clément de Saint-Marcq
bcf2125142 ramips: add support for Zorlik ZL5900V2
The Zorlik ZL5900V2 is an unbranded clone of HAME MPR-A1/2.  It is
marketed as "3G Wi-Fi Router".  Only the PCB has the model name
"ZL5900V2" printed on it.

Specifications:
- Ralink RT5350F (360 MHz)
- 32 MB RAM
- 8 MB Flash
- 802.11bgn 1T1R
- 1x 10/100 Mbps Ethernet
- 1x USB 2.0 (Type-A)
- 5200 mAh battery

The ramdisk image (not the squashfs sysupgrade image) can be flashed
through the web interface (named "GoAhead") of the factory firmware.
However, as the factory firmware does not cleanly unmount the rootfs
before flashing, the device may hang instead of rebooting after
successful write.  Power cycling the device gets you in OpenWrt where
the squashfs image may be flashed through normal sysupgrade procedure.

Signed-off-by: Vianney le Clément de Saint-Marcq <code@quartic.eu>
2018-04-08 09:53:50 +02:00
Zheng Qian
80a94aacaf ramips: add support for the YouHua WR1200JS
YouHua tech WR1200JS is an AC1200 router with 5 1Gb ports (4 Lan, 1 Wan)
and 1 USB 2.0 port.

Devices is base on MediaTek MT7621AT + MT7603E + MT7612E.

Specification:

- MT7612AT (880 MHz)
- 128 MB of RAM
- 16 MB of FLASH (SPI NOR)
- 5x 10/100/1000 Mbps Ethernet
- 2T2R 2.4 GHz (MT7603E)
- 2T2R 5 GHz (MT7612E)
- 1x USB 2.0
- 10x LED (Power 2G 5G WPS Internet LAN4-1 USB)
- 3x button (reset wifi wps)
- DC jack for main power input (12V)

Installation:

1.) Press reset key 5 sec and restore the factory default
2.) Login webUI and change username to root and set a
    new password
3.) Visit http://192.168.2.254/adm/telnetd.shtml and
    turn on the telnet service
4.) Copy openwrt-ramips-mt7621-youhua_wr1200js-initramfs-kernel.bin
    to a usb pan
5.) Plug the usb pan to the router, telnet to the router
    and login by root
6.) cd /media/sda1 and check the initramfs file is there
7.) exec command:
    mtd_write write openwrt-ramips-mt7621-youhua_wr1200js-initramfs-kernel.bin Kernel
8.) reboot and visit 192.168.1.1

Signed-off-by: Zheng Qian <sotux82@gmail.com>
2018-04-08 09:52:48 +02:00
Giuseppe Lippolis
1680ae7eae ramips: add dwr-512 jboot firmware configuration
The previous fw version require the replacement of the stock bootloader
with u-boot. This prevent an easy stock restore of the original fw.

Now a proper fw util has been developed to manage the stock jboot
bootloader. Therefore make sense have a fw image for the stock
bootloader.

The old fw configuration (u-boot) is not compatible with the new one
and will not be supported anymore.

So at the end 2 image can be generated:

1) factory image with jboot bootloader
     openwrt-ramips-rt305x-dwr-512-b-squashfs-factory.bin
2) sysupgrade image with jboot bootloader
     openwrt-ramips-rt305x-dwr-512-b-squashfs-sysupgrade.bin

Signed-off-by: Giuseppe Lippolis <giu.lippolis@gmail.com>
2018-04-08 09:51:06 +02:00
Vianney le Clément de Saint-Marcq
eda27d7557 ramips: fix usbphy DT nodes on linux 4.14
The Ralink USB PHY driver merged into mainline has a slightly different
device tree binding than the patch that was used with linux 4.9.
The new driver requires a `ralink,sysctl` node pointing to the `syscon`
node.

This patch also sets `#phy-cells` to 0, as recommended by the mainline
documentation [1].

[1] Documentation/devicetree/bindings/phy/ralink-usb-phy.txt

Signed-off-by: Vianney le Clément de Saint-Marcq <code@quartic.eu>
2018-04-07 17:53:34 +02:00
Piotr Dymacz
10ea53f900 ramips: add U-Boot env support for ALFA Network AC1200RM
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
2018-04-06 23:11:00 +02:00
Piotr Dymacz
68dcec7e16 ramips: image: drop redundant SUPPORTED_DEVICES
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
2018-04-06 23:11:00 +02:00
John Crispin
bfed382540 ramips: fix build error caused by missing ifdef guard in hwnat code
Signed-off-by: John Crispin <john@phrozen.org>
2018-04-06 21:33:35 +02:00
John Crispin
424a9ae128 ramips: implement hardware NAT offload for MT7621
Supports IPv4 flow offloading on MT7621 for Routing, SNAT and DNAT

Supported are regular ethernet->ethernet connections, including one
802.1q VLAN and/or PPPoE encapsulation

Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-04-06 19:37:53 +02:00
Felix Fietkau
dea9922acd ramips: drop linux 4.9 support
4.14 has been tested a lot by a number of users, and we want to use it
for the release.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-04-06 18:21:45 +02:00
Felix Fietkau
804952e7ef ramips: switch to linux 4.14
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-04-06 18:07:43 +02:00
NeilBrown
f27336e115 ramips: mtk-mmc: don't advertise highmem support.
of_dma_configure() sets a default ->dma_mask of
DMA_BIT_MASK(32), claiming devices can DMA from
the full 32bit address space.
The mtk-mmc driver does not support access to
highmem pages, so it is really limited to the
bottom 512M (actually 448M due to 64M of IO space).
Setting ->dma_mask to NULL causes mmc_setup_queue()
to fall-back to using BLK_BOUNCE_HIGH to tell the
block layer to use a bounce-buffer for any highmem
pages requiring IO.

Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-04-05 19:48:47 +02:00
Felix Fietkau
6a621f4bd9 ramips: fix BUG_ON on mtk-mmc driver probe
Our .dts files only have one device defined and this is unlikely to
change, so statically initialize host->id to 0.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-04-05 18:12:30 +02:00
Felix Fietkau
f9b2d369a6 ramips: move mtk-mmc driver code out of patches-*/ and into files-*/
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2018-04-05 18:12:30 +02:00
Pawel Dembicki
8db84cc0ee ramips: add support for DLINK DWR-921-C3
The DWR-921-C3 Wireless Routers with LTE embedded modem is based on the
MT7620N SoC.

Specification:

  * MediaTek MT7620N (580 Mhz)
  * 64 MB of RAM
  * 16 MB of FLASH
  * 802.11bgn radio
  * 5x 10/100 Mbps Ethernet (1 WAN and 4 LAN)
  * 2x external, detachable (LTE) antennas
  * UART header on PCB (57600 8n1)
  * 6x LED (GPIO-controlled)
  * 1x bi-color Signal Strength LED (GPIO-controlled)
  * 2x button
  * JBOOT bootloader

Installation:
Apply factory image via d-link http web-gui.

How to revert to OEM firmware:
1.) Push the reset button and turn on the power. Wait until LED start
    blinking (~10sec.)
2.) Upload original factory image via JBOOT http (IP: 192.168.123.254)
3.) If http doesn't work, it can be done with curl command:
    curl -F FN=@XXXXX.bin http://192.168.123.254/upg
    where XXXXX.bin is name of firmware file.

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
2018-04-04 08:42:46 +02:00
Giuseppe Lippolis
6525bffc0a ramips: add support for DLINK DWR-921-C1
The DWR-921-C1 Wireless Routers with LTE embedded modem is based on the
MT7620N SoC.

Specification:

  * MediaTek MT7620N (580 Mhz)
  * 64 MB of RAM
  * 16 MB of FLASH
  * 802.11bgn radio
  * 5x 10/100 Mbps Ethernet (1 WAN and 4 LAN)
  * 2x external, detachable (LTE) antennas
  * UART header on PCB (57600 8n1)
  * 6x LED (GPIO-controlled)
  * 1x bi-color Signal Strength LED (GPIO-controlled)
  * 2x button
  * JBOOT bootloader

The status led has been assigned to the dwr-921-c1:green:sigstrength (lte
signal strength) led. At the end of the boot it is switched off and is
available for lte operation. Work correctly also during sysupgrade
operation.

Installation:
Apply factory image via d-link http web-gui.

How to revert to OEM firmware:
1.) Push the reset button and turn on the power. Wait until LED start
    blinking (~10sec.)
2.) Upload original factory image via JBOOT http (IP: 192.168.123.254)
3.) If http doesn't work, it can be done with curl command:
    curl -F FN=@XXXXX.bin http://192.168.123.254/upg
    where XXXXX.bin is name of firmware file.

Signed-off-by: Giuseppe Lippolis <giu.lippolis@gmail.com>
2018-04-04 08:42:35 +02:00
André Draszik
cd75d6f7b3 ramips: mt7620: eMMC: fix compiler warnings in non-debug mode
drivers/mmc/host/mtk-mmc/dbg.c:51:13: warning: 'cmd_buf' defined but not used [-Wunused-variable]
 static char cmd_buf[256];
             ^~~~~~~

In addition, msdc_reg[] is completely unused, even in debug
mode.

Signed-off-by: André Draszik <git@andred.net>
2018-04-04 08:29:17 +02:00
André Draszik
584b2a26f5 ramips: mt7620: eMMC: remove unused variable
msdc_6575_host[] is unused, just remove it. Also, it
was the source of memory corruption up until the
previous fix to this driver.

Signed-off-by: André Draszik <git@andred.net>
2018-04-04 08:29:17 +02:00
André Draszik
ace1686200 ramips: mt7620: eMMC: stop invalid memory access if only one device is defined
pdev->id is -1 when only one device exists, and is used:
* as an index into drv_mode[] to determine whether to use
  PIO or DMA mode (via host->id)
* as an index into msdc_6575_host[], to store the
  mmc_priv() data.

Obviously, -1 is not a valid index in either case, causing
us to read invalid memory, and memory corruption,
respectively.

The invalid memory read is causing non-deterministic
behaviour, in particular in the v4.4 kernel it still
picked DMA mode, but in the v4.9 it now always picks
PIO mode.
Also, PIO mode doesn't work, causing the following:

/ # echo 3 > /proc/sys/vm/drop_caches
[ 3845.249237] sh (128): drop_caches: 3

/ # /root/usr/lib/libc.so
[ 3846.096070] do_page_fault(): sending SIGSEGV to libc.so for invalid read access from 7f9cb5a0
[ 3846.104758] epc = 779b0ea4 in libc.so[7792f000+c3000]
[ 3846.109907] ra  = 779a8004 in libc.so[7792f000+c3000]
Segmentation fault

/ # /root/usr/lib/libc.so
musl libc (mipsel-sf)
Version 1.1.16-git-40-g54807d47
Dynamic Program Loader
Usage: /root/usr/lib/libc.so [options] [--] pathname [args]

(i.e. initial page-in of any binary causes a segfault,
subsequent access works.)

While this change doesn't fix PIO mode, it at least makes
us deterministically use DMA (which works), and it also
stops us from corrupting memory.

Signed-off-by: André Draszik <git@andred.net>
2018-04-04 08:29:17 +02:00