db410c: update wlan and bt mac addresses from firmware

The firmware that runs before u-boot modifies u-boot's device tree
adding the local-mac-address and local-bd-address properties for the
compatibles "qcom,wcnss-bt" and "qcom,wcnss-wlan".

This commit reads that firmware, retrieves the properties and fixups
the device tree that is passed to the kernel before booting.

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>

diff --git a/arch/arm/dts/dragonboard410c.dts b/arch/arm/dts/dragonboard410c.dts
index 7746622dda802e36bd0f56da88aeea96865a5953..25aeac46b132f408a26590797ff21ad972140c75 100644 (file)
--- a/arch/arm/dts/dragonboard410c.dts
+++ b/arch/arm/dts/dragonboard410c.dts
@@ -86,6 +86,16 @@
                        clock-frequency = <200000000>;
                };
 
+               wcnss {
+                       bt {
+                               compatible="qcom,wcnss-bt";
+                       };
+
+                       wifi {
+                               compatible="qcom,wcnss-wlan";
+                       };
+               };
+
                spmi@200f000 {
                        compatible = "qcom,spmi-pmic-arb";
                        reg = <0x200f800 0x200 0x2400000 0x400000 0x2c00000 0x400000>;

diff --git a/board/qualcomm/dragonboard410c/Makefile b/board/qualcomm/dragonboard410c/Makefile
index cd678088faf9a01107460254d4315cd6b98a11d2..5082383be4f64e43aa323079d69378da4daaf527 100644 (file)
--- a/board/qualcomm/dragonboard410c/Makefile
+++ b/board/qualcomm/dragonboard410c/Makefile
@@ -5,4 +5,5 @@
 #
 
 obj-y  := dragonboard410c.o
+obj-y  += lowlevel_init.o
 extra-y += head.o

diff --git a/board/qualcomm/dragonboard410c/dragonboard410c.c b/board/qualcomm/dragonboard410c/dragonboard410c.c
index 848e27848b743a3d7c31b43966b127e5064a2b4b..7daf7c8b52fb5f1fc18047487b622a0c3bdd52f6 100644 (file)
--- a/board/qualcomm/dragonboard410c/dragonboard410c.c
+++ b/board/qualcomm/dragonboard410c/dragonboard410c.c
@@ -10,9 +10,16 @@
 #include <dm.h>
 #include <usb.h>
 #include <asm/gpio.h>
+#include <fdt_support.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+/* pointer to the device tree ammended by the firmware */
+extern const void *fw_dtb;
+
+static char wlan_mac[ARP_HLEN];
+static char bt_mac[ARP_HLEN];
+
 int dram_init(void)
 {
        gd->ram_size = PHYS_SDRAM_1_SIZE;
@@ -27,7 +34,6 @@ int dram_init_banksize(void)
        return 0;
 }
 
-
 int board_prepare_usb(enum usb_init_type type)
 {
        static struct udevice *pmic_gpio;
@@ -96,11 +102,6 @@ int board_prepare_usb(enum usb_init_type type)
        return 0;
 }
 
-int board_init(void)
-{
-       return 0;
-}
-
 /* Check for vol- button - if pressed - stop autoboot */
 int misc_init_r(void)
 {
@@ -134,3 +135,39 @@ int misc_init_r(void)
 
        return 0;
 }
+
+int board_init(void)
+{
+       int offset, len;
+       const char *mac;
+
+       /* take a copy of the firmware information (the user could unknownly
+          overwrite that DDR via tftp or other means)  */
+
+       offset = fdt_node_offset_by_compatible(fw_dtb, -1, "qcom,wcnss-wlan");
+       if (offset >= 0) {
+               mac = fdt_getprop(fw_dtb, offset, "local-mac-address", &len);
+               if (mac)
+                       memcpy(wlan_mac, mac, ARP_HLEN);
+       }
+
+       offset = fdt_node_offset_by_compatible(fw_dtb, -1, "qcom,wcnss-bt");
+       if (offset >= 0) {
+               mac = fdt_getprop(fw_dtb, offset, "local-bd-address", &len);
+               if (mac)
+                       memcpy(bt_mac, mac, ARP_HLEN);
+       }
+
+       return 0;
+}
+
+int ft_board_setup(void *blob, bd_t *bd)
+{
+       do_fixup_by_compat(blob, "qcom,wcnss-wlan", "local-mac-address",
+                          wlan_mac, ARP_HLEN, 1);
+
+       do_fixup_by_compat(blob, "qcom,wcnss-bt", "local-bd-address",
+                          bt_mac, ARP_HLEN, 1);
+
+       return 0;
+}

diff --git a/board/qualcomm/dragonboard410c/lowlevel_init.S b/board/qualcomm/dragonboard410c/lowlevel_init.S
new file mode 100644 (file)
index 0000000..15b2d0c
--- /dev/null
+++ b/board/qualcomm/dragonboard410c/lowlevel_init.S
@@ -0,0 +1,28 @@
+/*
+ * (C) Copyright 2016
+ * Cédric Schieli <cschieli@gmail.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <config.h>
+
+.align 8
+.global fw_dtb
+fw_dtb:
+       .dword 0x0
+
+/*
+ * Routine: save_boot_params (called after reset from start.S)
+ * Description: save ATAG/FDT address provided by the firmware at boot time
+ */
+
+.global save_boot_params
+save_boot_params:
+
+       /* The firmware provided ATAG/FDT address can be found in r2/x0 */
+       adr     x8, fw_dtb
+       str     x0, [x8]
+
+       /* Returns */
+       b       save_boot_params_ret

diff --git a/configs/dragonboard410c_defconfig b/configs/dragonboard410c_defconfig
index b71bff7592650d59a27b83a97a79c445d858c8d5..cfe9be97f35be241c9420ca1d57cedb9a1ba38b4 100644 (file)
--- a/configs/dragonboard410c_defconfig
+++ b/configs/dragonboard410c_defconfig
@@ -44,3 +44,6 @@ CONFIG_USB_ETHER_ASIX88179=y
 CONFIG_USB_ETHER_MCS7830=y
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_OF_LIBFDT_OVERLAY=y
+CONFIG_OF_CONTROL=y
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_OF_BOARD_SETUP=y