這一篇是紀錄，不是要上什麼pr什麼的。感謝Openwrt論譠上的討論，一些東西讓我可以比較有根據的去驗證。
更新 2025-02-21
1. 看了一堆有的沒有的資料並且邊驗證邊試出來M32的藍芽是在MT7915AN的晶片上，經由UART3的TXD/RXD/CTS/RTS與MT7622B互連。
1a. MT7622B自己也有藍芽但線路上是用0Ohm接地掉了，沒有拉天線出來使用。
1b. 除了UART3的訊號外還有一個GPIO61會在Bootloader階段拉High。
1c. 官方的M32的DTS與我手邊機器有些地方不一樣，在原始M32的討論篇中也有人提出來。所以改了也不少。參考連結Support for DLink M32 Mesh System and R32 Router
2. Openwrt論譠上有人提供了Unifi 6 Lite的Bluetooth Patch。幫助很大但也有限，後面再說明。參考連結 UART3 Bluetooth in UniFi 6 Lite
3. mt7915_patch_e2_hdr.bin這個檔案就自己想辦法了，不確定同平台的能不能通用。
4. 經過一連串的嘗試錯誤後的組合結果如下，不太會用diff與patch，打不進去的話再自己修改一下。
5. Build完後在目標機器上跑的時候需要先安裝WIFI Driver，接著安裝完btmtkuart後"必須"把/etc/modules.d/btmtkuart刪除，並在/etc/rc.local加入sleep 5;insmod btmtkuart;。
5a. 因為MT7915的WIFI與BT的Reset控制是一起的，目前試出來的結論是由WIFI Driver控制。這樣在Software Reboot時才能正常。
5b. 目前驗證的結論是要晚一點載入btmtkuart，才會正常的跑完Firmware Patch；否則隨機性的掉Frame後失敗。雖然可以寫進btmtkuart.c當中啦…但想想還是算了。
5c. 順利的話開機會花9秒左右完成初始化，之後使用hciconfig hci0 up與hcitool -i hci0 lescan。
--- a/drivers/bluetooth/btmtkuart.c 2024-09-12 17:07:53.000000000 +0800
+++ b/drivers/bluetooth/btmtkuart.c 2025-02-20 14:58:49.174506937 +0800
@@ -21,6 +21,7 @@
#include <linux/pinctrl/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
+#include <linux/nvmem-consumer.h>
#include <linux/serdev.h>
#include <linux/skbuff.h>
@@ -34,6 +35,7 @@
#define FIRMWARE_MT7622 "mediatek/mt7622pr2h.bin"
#define FIRMWARE_MT7663 "mediatek/mt7663pr2h.bin"
#define FIRMWARE_MT7668 "mediatek/mt7668pr2h.bin"
+#define FIRMWARE_MT7915 "mediatek/mt7915_patch_e2_hdr.bin"
#define MTK_STP_TLR_SIZE 2
@@ -43,6 +45,7 @@
#define BTMTKUART_REQUIRED_WAKEUP 4
#define BTMTKUART_FLAG_STANDALONE_HW BIT(0)
+#define BTMTKUART_FLAG_USE_FLOW_CONTROL BIT(1)
enum {
MTK_WMT_PATCH_DWNLD = 0x1,
@@ -138,13 +141,27 @@
u8 stp_cursor;
u16 stp_dlen;
+ int have_bdaddr;
+ bdaddr_t bdaddr;
+ bool is_ble_stp;
+
const struct btmtkuart_data *data;
};
+struct btmtk_patch_header {
+ u8 datetime[16];
+ u8 platform[4];
+ __le16 hwver;
+ __le16 swver;
+ __le32 patchver;
+} __packed;
+
#define btmtkuart_is_standalone(bdev) \
((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW)
#define btmtkuart_is_builtin_soc(bdev) \
!((bdev)->data->flags & BTMTKUART_FLAG_STANDALONE_HW)
+#define btmtkuart_use_flow_control(bdev) \
+ !!((bdev)->data->flags & BTMTKUART_FLAG_USE_FLOW_CONTROL)
static int mtk_hci_wmt_sync(struct hci_dev *hdev,
struct btmtk_hci_wmt_params *wmt_params)
@@ -158,6 +175,7 @@
int err;
hlen = sizeof(*hdr) + wmt_params->dlen;
+
if (hlen > 255) {
err = -EINVAL;
goto err_free_skb;
@@ -239,9 +257,12 @@
return err;
}
+
+
static int mtk_setup_firmware(struct hci_dev *hdev, const char *fwname)
{
struct btmtk_hci_wmt_params wmt_params;
+ struct btmtk_patch_header *hdr;
const struct firmware *fw;
const u8 *fw_ptr;
size_t fw_size;
@@ -256,6 +277,10 @@
fw_ptr = fw->data;
fw_size = fw->size;
+ hdr = (struct btmtk_patch_header *)fw_ptr;
+
+ bt_dev_info(hdev, "HW/SW Version: 0x%04x%04x, Build Time: %s",
+ be16_to_cpu(hdr->hwver), be16_to_cpu(hdr->swver), hdr->datetime);
/* The size of patch header is 30 bytes, should be skip */
if (fw_size < 30) {
@@ -478,7 +503,7 @@
int sz_left = count, sz_h4, adv;
int err;
- while (sz_left > 0) {
+ while (bdev->is_ble_stp && sz_left > 0) {
/* The serial data received from MT7622 BT controller is
* at all time padded around with the STP header and tailer.
*
@@ -516,6 +541,18 @@
sz_left -= sz_h4;
p_left += sz_h4;
}
+ if(!bdev->is_ble_stp) {
+ bdev->rx_skb = h4_recv_buf(bdev->hdev, bdev->rx_skb, data,
+ count, mtk_recv_pkts,
+ ARRAY_SIZE(mtk_recv_pkts));
+ if (IS_ERR(bdev->rx_skb)) {
+ err = PTR_ERR(bdev->rx_skb);
+ bt_dev_err(bdev->hdev,
+ "btmtkuart_recv non-stp ERR(%d)", err);
+ bdev->rx_skb = NULL;
+ return;
+ }
+ }
}
static int btmtkuart_receive_buf(struct serdev_device *serdev, const u8 *data,
@@ -569,7 +606,7 @@
goto err_serdev_close;
}
- serdev_device_set_flow_control(bdev->serdev, false);
+ serdev_device_set_flow_control(bdev->serdev, btmtkuart_use_flow_control(bdev));
}
bdev->stp_cursor = 2;
@@ -687,7 +724,7 @@
return err;
}
- serdev_device_set_flow_control(bdev->serdev, false);
+ serdev_device_set_flow_control(bdev->serdev, btmtkuart_use_flow_control(bdev));
/* Send a dummy byte 0xff to activate the new baudrate */
param = 0xff;
@@ -719,6 +756,25 @@
return 0;
}
+static int btmtkuart_set_bdaddr(struct hci_dev *hdev)
+{
+ struct btmtkuart_dev *bdev = hci_get_drvdata(hdev);
+ struct sk_buff *skb = 0;
+
+
+ if (!bdev->have_bdaddr) {
+ set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
+ }
+ else {
+ skb = __hci_cmd_sync(hdev, 0xfc1a, sizeof(bdaddr_t),
+ &bdev->bdaddr, HCI_INIT_TIMEOUT);
+ }
+ if (!IS_ERR(skb))
+ kfree_skb(skb);
+
+ return PTR_ERR_OR_ZERO(skb);
+}
+
static int btmtkuart_setup(struct hci_dev *hdev)
{
struct btmtkuart_dev *bdev = hci_get_drvdata(hdev);
@@ -751,9 +807,13 @@
clear_bit(BTMTKUART_REQUIRED_WAKEUP, &bdev->tx_state);
}
+ if (err < 0)
+ return err;
+
if (btmtkuart_is_standalone(bdev))
btmtkuart_change_baudrate(hdev);
+
/* Query whether the firmware is already download */
wmt_params.op = MTK_WMT_SEMAPHORE;
wmt_params.flag = 1;
@@ -825,6 +885,10 @@
}
kfree_skb(skb);
+ err = btmtkuart_set_bdaddr(hdev);
+ if (err)
+ return err;
+
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
duration = (unsigned long long)ktime_to_ns(delta) >> 10;
@@ -865,24 +929,26 @@
/* Prepend skb with frame type */
memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1);
- /* Make sure that there is enough rooms for STP header and trailer */
- if (unlikely(skb_headroom(skb) < sizeof(*shdr)) ||
- (skb_tailroom(skb) < MTK_STP_TLR_SIZE)) {
- err = pskb_expand_head(skb, sizeof(*shdr), MTK_STP_TLR_SIZE,
- GFP_ATOMIC);
- if (err < 0)
- return err;
- }
+ if (bdev->is_ble_stp) {
+ /* Make sure that there is enough rooms for STP header and trailer */
+ if (unlikely(skb_headroom(skb) < sizeof(*shdr)) ||
+ (skb_tailroom(skb) < MTK_STP_TLR_SIZE)) {
+ err = pskb_expand_head(skb, sizeof(*shdr), MTK_STP_TLR_SIZE,
+ GFP_ATOMIC);
+ if (err < 0)
+ return err;
+ }
- /* Add the STP header */
- dlen = skb->len;
- shdr = skb_push(skb, sizeof(*shdr));
- shdr->prefix = 0x80;
- shdr->dlen = cpu_to_be16((dlen & 0x0fff) | (type << 12));
- shdr->cs = 0; /* MT7622 doesn't care about checksum value */
+ /* Add the STP header */
+ dlen = skb->len;
+ shdr = skb_push(skb, sizeof(*shdr));
+ shdr->prefix = 0x80;
+ shdr->dlen = cpu_to_be16((dlen & 0x0fff) | (type << 12));
+ shdr->cs = 0; /* MT7622 doesn't care about checksum value */
- /* Add the STP trailer */
- skb_put_zero(skb, MTK_STP_TLR_SIZE);
+ /* Add the STP trailer */
+ skb_put_zero(skb, MTK_STP_TLR_SIZE);
+ }
skb_queue_tail(&bdev->txq, skb);
@@ -895,6 +961,7 @@
struct btmtkuart_dev *bdev = serdev_device_get_drvdata(serdev);
struct device_node *node = serdev->dev.of_node;
u32 speed = 921600;
+ struct nvmem_cell *bdaddr_cell;
int err;
if (btmtkuart_is_standalone(bdev)) {
@@ -902,6 +969,10 @@
bdev->desired_speed = speed;
+ bdev->is_ble_stp = true;
+ if (of_property_read_bool(node, "not-stp"))
+ bdev->is_ble_stp = false;
+
bdev->vcc = devm_regulator_get(&serdev->dev, "vcc");
if (IS_ERR(bdev->vcc)) {
err = PTR_ERR(bdev->vcc);
@@ -955,6 +1026,32 @@
return PTR_ERR(bdev->clk);
}
+ bdaddr_cell = nvmem_cell_get(&serdev->dev, "bd-address");
+ if (!IS_ERR(bdaddr_cell)) {
+ bdaddr_t *bdaddr;
+ size_t len;
+
+ bdaddr = nvmem_cell_read(bdaddr_cell, &len);
+ nvmem_cell_put(bdaddr_cell);
+ if (IS_ERR(bdaddr)) {
+ dev_err(&serdev->dev, "Failed to read nvmem bd-address\n");
+ return PTR_ERR(bdaddr);
+ }
+ if (len != sizeof(bdaddr_t)) {
+ dev_err(&serdev->dev, "Invalid nvmem bd-address length\n");
+ kfree(bdaddr);
+ return -EINVAL;
+ }
+
+ /* As per the device tree bindings, the value from nvmem is
+ * expected to be MSB first, but in the kernel it is expected
+ * that bdaddr_t is LSB first.
+ */
+ bdev->have_bdaddr = 1;
+ baswap(&bdev->bdaddr, bdaddr);
+ kfree(bdaddr);
+ }
+
return 0;
}
@@ -1101,11 +1198,18 @@
.fwname = FIRMWARE_MT7668,
};
+static const struct btmtkuart_data mt7915_data = {
+ .flags = BTMTKUART_FLAG_STANDALONE_HW | BTMTKUART_FLAG_USE_FLOW_CONTROL,
+ .fwname = FIRMWARE_MT7915,
+};
+
+
#ifdef CONFIG_OF
static const struct of_device_id mtk_of_match_table[] = {
{ .compatible = "mediatek,mt7622-bluetooth", .data = &mt7622_data},
{ .compatible = "mediatek,mt7663u-bluetooth", .data = &mt7663_data},
{ .compatible = "mediatek,mt7668u-bluetooth", .data = &mt7668_data},
+ { .compatible = "mediatek,mt7915-bluetooth", .data = &mt7915_data},
{ }
};
MODULE_DEVICE_TABLE(of, mtk_of_match_table);
--- a/target/linux/mediatek/dts/mt7622-dlink-eagle-pro-ai-ax3200-a1.dtsi 2024-09-24 06:53:33.000000000 +0800+++ b/target/linux/mediatek/dts/mt7622-dlink-eagle-pro-ai-ax3200-a1.dtsi 2025-02-04 16:44:41.211442072 +0800@@ -54,10 +54,6 @@status = "okay";};-&btif {- status = "okay";-};-ð {pinctrl-names = "default";pinctrl-0 = <ð_pins>;@@ -119,12 +115,6 @@status = "okay";};-&pcie1 {- pinctrl-names = "default";- pinctrl-0 = <&pcie1_pins>;- status = "okay";-};-&pio {epa_elna_pins: epa-elna-pins {mux {@@ -146,18 +136,7 @@pcie0_pins: pcie0-pins {mux {function = "pcie";- groups = "pcie0_pad_perst",- "pcie0_1_waken",- "pcie0_1_clkreq";- };- };-- pcie1_pins: pcie1-pins {- mux {- function = "pcie";- groups = "pcie1_pad_perst",- "pcie1_0_waken",- "pcie1_0_clkreq";+ groups = "pcie0_pad_perst";};};@@ -219,133 +198,6 @@};};-&snfi {- pinctrl-names = "default";- pinctrl-0 = <&serial_nand_pins>;- status = "okay";-- snand: flash@0 {- compatible = "spi-nand";- mediatek,bmt-table-size = <0x1000>;- mediatek,bmt-v2;- nand-ecc-engine = <&snfi>;- reg = <0>;- spi-rx-bus-width = <4>;- spi-tx-bus-width = <4>;-- partitions {- compatible = "fixed-partitions";- #address-cells = <1>;- #size-cells = <1>;-- partition@0 {- label = "Preloader";- reg = <0x00000000 0x00080000>;- read-only;- };-- partition@80000 {- label = "ATF";- reg = <0x00080000 0x00040000>;- read-only;- };-- partition@C0000 {- label = "Bootloader";- reg = <0x000C0000 0x00080000>;- read-only;- };-- partition@140000 {- label = "BootConfig";- reg = <0x00140000 0x00040000>;- };-- partition@180000 {- label = "Odm";- reg = <0x00180000 0x00040000>;- read-only;- odm_partition: nvmem-layout {- compatible = "fixed-layout";- };- };-- config1: partition@1C0000 {- compatible = "nvmem-cells";- label = "Config1";- reg = <0x001C0000 0x00080000>;- read-only;- };-- partition@240000 {- label = "Config2";- reg = <0x00240000 0x00080000>;- read-only;- };-- partition@2C0000 {- label = "Kernel1";- reg = <0x002C0000 0x02D00000>;-- compatible = "denx,fit";- openwrt,cmdline-match = "boot_part=Kernel1";- partition@0 {- label = "kernel";- reg = <0x00000000 0x00800000>;- };-- partition@800000 {- label = "ubi";- reg = <0x00800000 0x02500000>;- };- };-- partition@2FC0000 {- label = "Kernel2";- reg = <0x02FC0000 0x02D00000>;-- compatible = "denx,fit";- openwrt,cmdline-match = "boot_part=Kernel2";- partition@0 {- label = "kernel";- reg = <0x00000000 0x00800000>;- };-- partition@800000 {- label = "ubi";- reg = <0x00800000 0x02500000>;- };- };-- factory: partition@5CC0000 {- label = "Factory";- reg = <0x05CC0000 0x00100000>;- read-only;- };-- partition@5DC0000 {- label = "Mydlink";- reg = <0x05DC0000 0x00200000>;- read-only;- };-- partition@5FC0000 {- label = "Storage";- reg = <0x05FC0000 0x00300000>;- read-only;- };- };- };-};--&ssusb {- status = "disabled";-};--&u3phy {- status = "disabled";-};-&uart0 {pinctrl-names = "default";pinctrl-0 = <&uart0_pins>;--- a/target/linux/mediatek/dts/mt7622-dlink-eagle-pro-ai-m32-a1.dts 2024-09-24 06:53:33.000000000 +0800+++ b/target/linux/mediatek/dts/mt7622-dlink-eagle-pro-ai-m32-a1.dts 2025-02-20 11:27:42.130339133 +0800@@ -53,10 +53,215 @@};};+&pio {++ //uart1 for mgm210p+ uart1_pins: uart1-pins {+ mux {+ function = "uart";+ groups = "uart1_0_tx_rx",+ "uart1_0_rts_cts";+ };+ };++ //uart2 for J1+ uart2_pins: uart2-pins {+ mux {+ function = "uart";+ groups = "uart2_1_tx_rx";+ };+ };++ //uart3 for MT7915 bluetooth+ uart3_pins: uart3-pins {+ mux {+ function = "uart";+ groups = "uart3_1_tx_rx",+ "uart3_1_rts_cts";+ };+ };++ //i2c0 for J1+ i2c0_pins: i2c-pins {+ mux {+ function = "i2c";+ groups = "i2c0";+ };+ };++};++&snfi {+ pinctrl-names = "default";+ pinctrl-0 = <&serial_nand_pins>;+ status = "okay";++ snand: flash@0 {+ compatible = "spi-nand";+ mediatek,bmt-table-size = <0x1000>;+ mediatek,bmt-v2;+ nand-ecc-engine = <&snfi>;+ reg = <0>;+ spi-rx-bus-width = <4>;+ spi-tx-bus-width = <4>;++ partitions {+ compatible = "fixed-partitions";+ #address-cells = <1>;+ #size-cells = <1>;++ partition@0 {+ label = "Preloader";+ reg = <0x00000000 0x00080000>;+ read-only;+ };++ partition@80000 {+ label = "ATF";+ reg = <0x00080000 0x00040000>;+ read-only;+ };++ partition@C0000 {+ label = "Bootloader";+ reg = <0x000C0000 0x00080000>;+ read-only;+ };++ partition@140000 {+ label = "BootConfig";+ reg = <0x00140000 0x00040000>;+ };++ partition@180000 {+ label = "Odm";+ reg = <0x00180000 0x00040000>;+ read-only;+ odm_partition: nvmem-layout {+ compatible = "fixed-layout";+ };+ };++ config1: partition@1C0000 {+ compatible = "nvmem-cells";+ label = "Config1";+ reg = <0x001C0000 0x00080000>;+ read-only;+ };++ partition@240000 {+ label = "Config2";+ reg = <0x00240000 0x00080000>;+ read-only;+ };++ partition@2C0000 {+ label = "Kernel1";+ reg = <0x002C0000 0x05A00000>;++ compatible = "denx,fit";+ openwrt,cmdline-match = "boot_part=Kernel1";+ partition@0 {+ label = "kernel";+ reg = <0x00000000 0x00800000>;+ };++ partition@800000 {+ label = "ubi";+ reg = <0x00800000 0x05200000>;+ };+ };++ factory: partition@5CC0000 {+ label = "Factory";+ reg = <0x05CC0000 0x00100000>;+ read-only;+ };+ partition@5DC0000 {+ label = "Mydlink";+ reg = <0x05DC0000 0x00200000>;+ read-only;+ };++ partition@5FC0000 {+ label = "Storage";+ reg = <0x05FC0000 0x00300000>;+ read-only;+ };+ };+ };+};+&odm_partition {- macaddr_odm: macaddr@83 {- compatible = "mac-base";- reg = <0x83 0x6>;- #nvmem-cell-cells = <1>;+ macaddr_odm: macaddr@81 {+ compatible = "mac-base";+ reg = <0x81 0x6>;+ #nvmem-cell-cells = <1>;+ };+};++&uart1 {+ pinctrl-names = "default";+ pinctrl-0 = <&uart1_pins>;++ status = "okay";+};++&uart2 {+ pinctrl-names = "default";+ pinctrl-0 = <&uart2_pins>;++ status = "okay";+};++&i2c0 {+ pinctrl-names = "default";+ pinctrl-0 = <&i2c0_pins>;++ status = "okay";+};++&uart3 {++ /* The btmtkuart driver uses "runtime" not "default"+ * use runtime here so that there isn't a clash when+ * btmtkuart requests "runtime"+ */++ pinctrl-names = "runtime";+ pinctrl-0 = <&uart3_pins>;++ status = "okay";++ bluetooth {+ compatible = "mediatek,mt7915-bluetooth";++ current-speed = <921600>;++ pinctrl-names = "runtime";+ pinctrl-0 = <&uart3_pins>;+ not-stp;++ /* The bootloader uses this as the "boot" gpio+ * it doesn't appear to do anything when the system+ * is running, but omitting it causes the driver to+ * attempt the same using the serial lines as gpio+ * which causes pinctrl woe+ */+ boot-gpios=<&pio 61 GPIO_ACTIVE_LOW>;++ // Reset is shared between wifi and bt.+ // reset-gpios=<&gpio GPIO_ACTIVE_LOW>;++ nvmem-cells = <&macaddr_odm 0>;+ nvmem-cell-names = "bd-address";};};++&ssusb {+ status = "okay";+};++&u3phy {+ status = "okay";+};--- a/target/linux/mediatek/dts/mt7622-dlink-eagle-pro-ai-r32-a1.dts 2024-09-24 06:53:33.000000000 +0800+++ b/target/linux/mediatek/dts/mt7622-dlink-eagle-pro-ai-r32-a1.dts 2025-02-04 11:47:22.836414440 +0800@@ -68,11 +68,137 @@};};+&snfi {+ pinctrl-names = "default";+ pinctrl-0 = <&serial_nand_pins>;+ status = "okay";++ snand: flash@0 {+ compatible = "spi-nand";+ mediatek,bmt-table-size = <0x1000>;+ mediatek,bmt-v2;+ nand-ecc-engine = <&snfi>;+ reg = <0>;+ spi-rx-bus-width = <4>;+ spi-tx-bus-width = <4>;++ partitions {+ compatible = "fixed-partitions";+ #address-cells = <1>;+ #size-cells = <1>;++ partition@0 {+ label = "Preloader";+ reg = <0x00000000 0x00080000>;+ read-only;+ };++ partition@80000 {+ label = "ATF";+ reg = <0x00080000 0x00040000>;+ read-only;+ };++ partition@C0000 {+ label = "Bootloader";+ reg = <0x000C0000 0x00080000>;+ read-only;+ };++ partition@140000 {+ label = "BootConfig";+ reg = <0x00140000 0x00040000>;+ };++ partition@180000 {+ label = "Odm";+ reg = <0x00180000 0x00040000>;+ read-only;+ odm_partition: nvmem-layout {+ compatible = "fixed-layout";+ };+ };++ config1: partition@1C0000 {+ compatible = "nvmem-cells";+ label = "Config1";+ reg = <0x001C0000 0x00080000>;+ read-only;+ };++ partition@240000 {+ label = "Config2";+ reg = <0x00240000 0x00080000>;+ read-only;+ };++ partition@2C0000 {+ label = "Kernel1";+ reg = <0x002C0000 0x02D00000>;++ compatible = "denx,fit";+ openwrt,cmdline-match = "boot_part=Kernel1";+ partition@0 {+ label = "kernel";+ reg = <0x00000000 0x00800000>;+ };++ partition@800000 {+ label = "ubi";+ reg = <0x00800000 0x02500000>;+ };+ };++ partition@2FC0000 {+ label = "Kernel2";+ reg = <0x02FC0000 0x02D00000>;++ compatible = "denx,fit";+ openwrt,cmdline-match = "boot_part=Kernel2";+ partition@0 {+ label = "kernel";+ reg = <0x00000000 0x00800000>;+ };++ partition@800000 {+ label = "ubi";+ reg = <0x00800000 0x02500000>;+ };+ };++ factory: partition@5CC0000 {+ label = "Factory";+ reg = <0x05CC0000 0x00100000>;+ read-only;+ };++ partition@5DC0000 {+ label = "Mydlink";+ reg = <0x05DC0000 0x00200000>;+ read-only;+ };++ partition@5FC0000 {+ label = "Storage";+ reg = <0x05FC0000 0x00300000>;+ read-only;+ };+ };+ };+};+&odm_partition {- macaddr_odm: macaddr@81 {- compatible = "mac-base";- reg = <0x81 0x6>;- #nvmem-cell-cells = <1>;- };+ macaddr_odm: macaddr@81 {+ compatible = "mac-base";+ reg = <0x81 0x6>;+ #nvmem-cell-cells = <1>;+ };};+&ssusb {+ status = "disabled";+};++&u3phy {+ status = "disabled";+};
與官方的dts不同的是
1. M32有留了不少界面，經過驗證後就把定義寫進去。
2. 有一些IO定義與實際不符。
3. Partition將Kernel 1/2合併。
4. MAC Address的位置與官方的M32不同(但是與R32同…)
5. USB部份我有焊連接器與DC小板所以可以用。
與Unifi 6 BT那一篇不同的是
1. 經過驗證不需要加no-loopback-test那些
2. btmtkuart.c使用STP去包裝H4的Frame，而我實際驗證是MT7915AN回傳的不含STP。所以加了一些判斷跟修改source code。
3. MAC Address忘了先看，先用跟WIFI MAC。
2025-02-21 更新
後來想想還是寫進dts+btmtkuart.c裡…
實際上驗證要大約10秒才會正常，整體完成時間與寫進rc.local的差不多，都是在21~23秒時完成。
dts裡新增下面一行
current-speed = <921600>;
not-stp;
delay-load-fw = <10000>;
btmtkuart.c裡新增下面
struct btmtkuart_dev新增
int have_bdaddr;
bdaddr_t bdaddr;
bool is_ble_stp;
int delay_load_fw;
...
static int btmtkuart_setup(struct hci_dev *hdev)新增
if (status == BTMTK_WMT_PATCH_DONE) {
bt_dev_info(hdev, "Firmware already downloaded");
goto ignore_setup_fw;
}
/* Setup a firmware which the device definitely requires */
if (bdev->delay_load_fw > 0) {
bt_dev_info(hdev, "Delay patch firmware in %d ms.", bdev->delay_load_fw);
msleep(bdev->delay_load_fw);
}
err = mtk_setup_firmware(hdev, bdev->data->fwname);
if (err < 0)
...
static int btmtkuart_parse_dt(struct serdev_device *serdev)新增
struct nvmem_cell *bdaddr_cell;
int err, delayed_ms = 0;
if (btmtkuart_is_standalone(bdev)) {
of_property_read_u32(node, "current-speed", &speed);
bdev->desired_speed = speed;
bdev->is_ble_stp = true;
if (of_property_read_bool(node, "not-stp"))
bdev->is_ble_stp = false;
of_property_read_u32(node, "delay-load-fw", &delayed_ms);
bdev->delay_load_fw = delayed_ms;
bdev->vcc = devm_regulator_get(&serdev->dev, "vcc");
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