MIPS: AR9331: OKUD Max9331

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@@ -0,0 +1,144 @@
+OKUD MAX9331
+==============
+
+The USELESS Board seems useless
+
+  * Atheros ar9331 SoC(MIPS24Kc, 400MHz, 32bit);
+  * 64 MiB SDRAM;
+  * 16 MiB NOR type SPI Flash Memory;
+  * 3.3V TTL UART;
+  * 4 GiB USB Nand Flash Disk;
+  * 3 RJ45 Ports;
+  *   IEEE 802.11b/g;
+  * 3 User LEDs;
+  * 1 GPIO Button;
+
+The useless board always shiped with the lastest barebox and kernel. OpenWRT
+is supported too.
+
+Perparing Hardware
+------------------
+
+solder the board in the back, use a TTL dongle connect to JP1.
+
+::
+
+	TP2 -- TP3
+	TP1 -- TP4
+
+	+--|PWR|---|wan|---|lan1|---|lan2|-----|ANT|---+
+	|                                              |
+	|                                              |
+	|                                              |
+	|                                              |
+	|                                              |
+	|                          TP2                 |
+	|                           O  O TP1           |
+	|      TP3                                     |
+	|       O                                      |
+	| TP4 O                                        |
+	|     o o o                                    |
+	+----------------------------------------------+
+	    Tx Rx GND
+
+
+Running barebox
+---------------
+
+Barebox can be program to the board with:
+
+ * run by u-boot from tftp server
+ * run barebox from RAM or burn to flash by barebox
+ * run from spi flash
+
+Barebox can be started from U-Boot using tftp.
+To convert barebox.bin to u-boot uImage format:
+
+.. code-block:: sh
+
+  $ mkimage -A mips -O linux -T kernel -C none -a a0060000 -e a0060000 -n 'Barebox uImage' -d images/barebox-okud-max9331.img uImage
+  $ cp uImage /var/lib/tftpboot
+
+connect your board to your tftp-server network via Ethernet.
+next, setup network on MAX9331 and run:
+
+.. code-block:: console
+
+  hornet> set ipaddr 192.168.31.17
+  hornet> set serverip 192.168.31.40
+  hornet> tftpboot 0x81000000 uImage
+
+run from ram:
+
+.. code-block:: console
+
+  hornet> bootm 0x81000000
+
+or burn to flash, replace the 0x40000 to your uImage real size,
+
+.. code-block:: console
+
+  hornet> erase 0x9f020000 +0x40000
+  hornet> cp.b 0x81000000 0x9f020000 0x40000
+  hornet> reset
+
+if your board preinstalled with barebox:
+
+run barebox from ram by barebox
+
+copy the image to tftp server folder
+
+.. code-block:: sh
+
+  $ cp images/barebox-okud-max9331.img /var/lib/tftpboot/none-barebox-max9331
+
+enable dhcp service on the network
+
+.. code-block:: console
+
+   global net.server=10.1.1.72
+   boot bnet
+
+if you want to make it valid next boot
+
+.. code-block:: console
+
+   nv net.server=10.1.1.72
+   boot bnet
+
+update barebox by barebox
+
+.. code-block:: console
+
+   barebox_update /mnt/tftp/none-barebox-max9331
+
+run from spi flash
+
+max9331 has 16MiB spi flash on board, layout is like this
+
+.. code-block:: text
+
+   | boot0 | ... | barebox | ... | art |
+
+by default, the barebox bootloader is not located in the begginning of flash,
+instead we have a so called program boot0, it is a very simple program,
+it jump to 0x9f020000 where the first instruction of barebox.
+This is usefull when debug with jtag or choosing different bootloaders.
+or even boot kernel without bootloader.
+
+.. code-block:: assembly
+
+ lui  ra, 0x9f02
+ jr   ra
+ nop
+
+ b    .
+ nop
+
+Links
+-----
+
+See also
+
+  * http://www.eeboard.com/wp-content/uploads/downloads/2013/08/AR9331.pdf
+  * http://squonk42.github.io/TL-WR703N/

index e85647a..5f9b61e 100644
@@ -4,6 +4,7 @@ obj-$(CONFIG_BOARD_CI20) += img-ci20/
 obj-$(CONFIG_BOARD_DLINK_DIR320) += dlink-dir-320/
 obj-$(CONFIG_BOARD_DPTECHNICS_DPT_MODULE) += dptechnics-dpt-module/
 obj-$(CONFIG_BOARD_OPENEMBEDED_SOM9331) += openembed-som9331/
+obj-$(CONFIG_BOARD_OKUD_MAX9331) += okud-max9331/
 obj-$(CONFIG_BOARD_LOONGSON_TECH_LS1B) += loongson-ls1b/
 obj-$(CONFIG_BOARD_NETGEAR_WG102) += netgear-wg102/
 obj-$(CONFIG_BOARD_QEMU_MALTA) += qemu-malta/

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@@ -0,0 +1,2 @@
+lwl-y += lowlevel.o
+lwl-y += lowlevel_boot0.o

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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2017 Oleksij Rempel <[email protected]>
+ * Copyright (C) 2019 Du Huanpeng <[email protected]>
+ */
+
+#define BOARD_PBL_START start_okud_max9331
+
+#include <mach/debug_ll.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <asm/asm.h>
+#include <asm/pbl_macros.h>
+#include <mach/pbl_macros.h>
+#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
+
+ENTRY_FUNCTION(BOARD_PBL_START)
+
+	ar9331_pbl_generic_start
+
+ENTRY_FUNCTION_END(BOARD_PBL_START, ar9331_okud_max9331, SZ_64M)

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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2018 Oleksij Rempel <[email protected]>
+ * Copyright (C) 2019 Du Huanpeng <[email protected]>
+ */
+
+#define BOARD_PBL_START start_okud_max9331_boot0
+
+#include <mach/debug_ll.h>
+#include <asm/asm.h>
+#include <asm/pbl_macros.h>
+#include <mach/pbl_macros.h>
+#include <asm/pbl_nmon.h>
+
+ENTRY_FUNCTION(BOARD_PBL_START)
+
+        li      ra, 0xbfc20000
+        jr      ra
+	nop
+
+
+STOP_WITH_DEBUG_EVENT

index ab68f12..64321ce 100644
@@ -2,6 +2,7 @@ CONFIG_MACH_MIPS_ATH79=y
 CONFIG_BOARD_8DEVICES_LIMA=y
 CONFIG_BOARD_DPTECHNICS_DPT_MODULE=y
 CONFIG_BOARD_OPENEMBEDED_SOM9331=y
+CONFIG_BOARD_OKUD_MAX9331=y
 CONFIG_BOARD_TPLINK_MR3020=y
 CONFIG_BOARD_TPLINK_WDR4300=y
 CONFIG_BOARD_BLACK_SWIFT=y

index b0ad25e..e5900c9 100644
@@ -8,6 +8,7 @@ pbl-$(CONFIG_BOARD_BLACK_SWIFT) += black-swift.dtb.o
 pbl-$(CONFIG_BOARD_CI20) += img-ci20.dtb.o
 pbl-$(CONFIG_BOARD_DLINK_DIR320) += dlink-dir-320.dtb.o
 pbl-$(CONFIG_BOARD_DPTECHNICS_DPT_MODULE) += ar9331-dptechnics-dpt-module.dtb.o
+pbl-$(CONFIG_BOARD_OKUD_MAX9331) += ar9331-okud-max9331.dtb.o
 pbl-$(CONFIG_BOARD_OPENEMBEDED_SOM9331) += ar9331-openembed-som9331-board.dtb.o
 pbl-$(CONFIG_BOARD_LOONGSON_TECH_LS1B) += loongson-ls1b.dtb.o
 pbl-$(CONFIG_BOARD_QEMU_MALTA) += qemu-malta.dtb.o

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index 9dab5fc..2dfe0e5 100644
@@ -43,6 +43,13 @@ config BOARD_OPENEMBEDED_SOM9331
 	select HAVE_IMAGE_COMPRESSION
 	select HAS_NMON
 
+config BOARD_OKUD_MAX9331
+	bool "The Useless Board Max9331"
+	select SOC_QCA_AR9331
+	select HAVE_PBL_IMAGE
+	select HAVE_IMAGE_COMPRESSION
+	select HAS_NMON
+
 config BOARD_TPLINK_MR3020
 	bool "TP-LINK MR3020"
 	select SOC_QCA_AR9331

index 95c1001..072062b 100644
@@ -22,6 +22,14 @@ pblb-$(CONFIG_BOARD_OPENEMBEDED_SOM9331) += start_openembed_som9331_board
 FILE_barebox-openembed-som9331-board.img = start_openembed_som9331_board.pblb
 image-$(CONFIG_BOARD_OPENEMBEDED_SOM9331) += barebox-openembed-som9331-board.img
 
+pblb-$(CONFIG_BOARD_OKUD_MAX9331) += start_okud_max9331
+FILE_barebox-okud-max9331.img = start_okud_max9331.pblb
+image-$(CONFIG_BOARD_OKUD_MAX9331) += barebox-okud-max9331.img
+
+pblb-$(CONFIG_BOARD_OKUD_MAX9331) += start_okud_max9331_boot0
+FILE_barebox-okud-max9331-boot0.img = start_okud_max9331_boot0.pblb
+image-$(CONFIG_BOARD_OKUD_MAX9331) += barebox-okud-max9331-boot0.img
+
 pblb-$(CONFIG_BOARD_TPLINK_MR3020) += start_tplink_mr3020
 FILE_barebox-tplink-mr3020.img = start_tplink_mr3020.pblb
 image-$(CONFIG_BOARD_TPLINK_MR3020) += barebox-tplink-mr3020.img