openwrtv4/target/linux/ipq40xx/files-4.14/arch/arm/boot/dts/qcom-ipq4018-a42.dts
Sven Eckelmann 71ed9f10a3 ipq40xx: Use detailed reserved memory for A42
The APPSBL and anything after that it not allowed to touch some of the
memory regions which are used by other components. Still trying to write to
the memory can lead to sudden device restarts

  (IPQ40xx) # mw 87e80000 0
  data abort
  pc : [<873149f8>]          lr : [<87308578>]
  sp : 86edfc28  ip : 86ef4412     fp : 00000000
  r10: 00000000  r9 : 00000000     r8 : 86edff68
  r7 : 00000003  r6 : 8737e624     r5 : 86ef4420  r4 : 8736c154
  r3 : 00000000  r2 : 00000010     r1 : 00000000  r0 : 00000000
  Flags: nZCv  IRQs off  FIQs off  Mode SVC_32
  Resetting CPU ...

The device manufacturer only provided a very rough list of regions:

* rsvd1:     0x87000000 0x500000
* wifi_dump: 0x87500000 0x600000
* rsvd2:     0x87b00000 0x500000

A more detailed list for devices using the AP.DK reference design memory
maps was provided by Roman Yeryomin <roman@advem.lv> in commit 56f2df879fd
("ipq806x: ipq4019: add ap-dk01.1-c1 board support"):

* apps_bl:          0x87000000 0x400000
* sbl:              0x87400000 0x100000
* cnss_debug:       0x87500000 0x600000
* cpu_context_dump: 0x87b00000 0x080000
* tz_apps:          0x87b80000 0x280000
* smem:             0x87e00000 0x080000
* tz:               0x87e80000 0x180000

The u-boot function ipq_fdt_mem_rsvd_fixup seems to suggest that only the
rsvd2 (tz_apps, smem, tz) should be protected. All other regions would have
been removed by it when CONFIG_QCA_APPSBL_DLOAD is not enabled. This allows
to reduce the 16MB reserved memory region to only 4.5MB.

Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
2018-03-23 20:31:49 +01:00

237 lines
4.5 KiB
Text

/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
* Copyright (c) 2017, Sven Eckelmann <sven.eckelmann@openmesh.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND 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, DIRECT, 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.
*
*/
#include "qcom-ipq4019.dtsi"
#include "qcom-ipq4019-bus.dtsi"
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>
#include <dt-bindings/soc/qcom,tcsr.h>
/ {
model = "OpenMesh A42";
compatible = "openmesh,a42", "qcom,ipq4019";
reserved-memory {
#address-cells = <0x1>;
#size-cells = <0x1>;
ranges;
tz_apps@87b80000 {
reg = <0x87b80000 0x280000>;
no-map;
};
smem@87e00000 {
reg = <0x87e00000 0x080000>;
no-map;
};
tz@87e80000 {
reg = <0x87e80000 0x180000>;
no-map;
};
};
soc {
mdio@90000 {
status = "okay";
};
ess-psgmii@98000 {
status = "okay";
};
tcsr@194b000 {
/* select hostmode */
compatible = "qcom,tcsr";
reg = <0x194b000 0x100>;
qcom,usb-hsphy-mode-select = <TCSR_USB_HSPHY_HOST_MODE>;
status = "okay";
};
tcsr@1949000 {
compatible = "qcom,tcsr";
reg = <0x1949000 0x100>;
qcom,wifi_glb_cfg = <TCSR_WIFI_GLB_CFG>;
};
ess_tcsr@1953000 {
compatible = "qcom,tcsr";
reg = <0x1953000 0x1000>;
qcom,ess-interface-select = <TCSR_ESS_PSGMII>;
};
tcsr@1957000 {
compatible = "qcom,tcsr";
reg = <0x1957000 0x100>;
qcom,wifi_noc_memtype_m0_m2 = <TCSR_WIFI_NOC_MEMTYPE_M0_M2>;
};
usb2: usb2@60f8800 {
status = "okay";
};
serial@78af000 {
pinctrl-0 = <&serial_pins>;
pinctrl-names = "default";
status = "okay";
};
crypto@8e3a000 {
status = "okay";
};
watchdog@b017000 {
status = "okay";
};
ess-switch@c000000 {
status = "okay";
};
edma@c080000 {
status = "okay";
};
};
gpio-keys {
compatible = "gpio-keys";
reset {
label = "reset";
gpios = <&tlmm 59 GPIO_ACTIVE_LOW>;
linux,code = <KEY_RESTART>;
};
};
aliases {
led-boot = &power;
led-failsafe = &power;
led-running = &power;
led-upgrade = &power;
};
gpio-leds {
compatible = "gpio-leds";
red {
label = "a42:red:status";
gpios = <&tlmm 0 GPIO_ACTIVE_HIGH>;
linux,default-trigger = "default-off";
};
power: green {
label = "a42:green:status";
gpios = <&tlmm 1 GPIO_ACTIVE_HIGH>;
};
blue {
label = "a42:blue:status";
gpios = <&tlmm 2 GPIO_ACTIVE_HIGH>;
linux,default-trigger = "default-off";
};
};
watchdog {
compatible = "linux,wdt-gpio";
gpios = <&tlmm 5 GPIO_ACTIVE_LOW>;
hw_algo = "toggle";
/* hw_margin_ms is actually 300s but driver limits it to 60s */
hw_margin_ms = <60000>;
always-running;
};
};
&tlmm {
serial_pins: serial_pinmux {
mux {
pins = "gpio60", "gpio61";
function = "blsp_uart0";
bias-disable;
};
};
spi_0_pins: spi_0_pinmux {
pin {
function = "blsp_spi0";
pins = "gpio55", "gpio56", "gpio57";
drive-strength = <12>;
bias-disable;
};
pin_cs {
function = "gpio";
pins = "gpio54";
drive-strength = <2>;
bias-disable;
output-high;
};
};
};
&blsp_dma {
status = "okay";
};
&spi_0 {
pinctrl-0 = <&spi_0_pins>;
pinctrl-names = "default";
status = "okay";
cs-gpios = <&tlmm 54 GPIO_ACTIVE_HIGH>;
m25p80@0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <24000000>;
/* partitions are passed via bootloader */
};
};
&cryptobam {
status = "okay";
};
&gmac0 {
qcom,phy_mdio_addr = <4>;
qcom,poll_required = <1>;
qcom,forced_speed = <1000>;
qcom,forced_duplex = <1>;
vlan_tag = <2 0x20>;
};
&gmac1 {
qcom,phy_mdio_addr = <3>;
qcom,poll_required = <1>;
qcom,forced_speed = <1000>;
qcom,forced_duplex = <1>;
vlan_tag = <1 0x10>;
};
&usb2_hs_phy {
status = "okay";
};
&wifi0 {
status = "okay";
qcom,ath10k-calibration-variant = "OM-A42";
};
&wifi1 {
status = "okay";
qcom,ath10k-calibration-variant = "OM-A42";
};