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Bluetooth: btusb: Add support Mediatek MT7925
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This patch is added support Mediatek MT7925.
1. The firmware location of MT7925 will set to
/lib/firmware/mediatek/mt7925
2. Add Mediatek private data in hdev
to record the device for handle MT7925 flow.
3. Use the recoreded dev_id to condition chip reset flow.

The information in /sys/kernel/debug/usb/devices about the MT7925U
Bluetooth device is listed as the below

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 27 Spd=480  MxCh= 0
D:  Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=0e8d ProdID=7925 Rev= 1.00
S:  Manufacturer=MediaTek Inc.
S:  Product=Wireless_Device
S:  SerialNumber=000000000
C:* #Ifs= 4 Cfg#= 1 Atr=e0 MxPwr=100mA
A:  FirstIf#= 0 IfCount= 3 Cls=e0(wlcon) Sub=01 Prot=01
I:* If#= 0 Alt= 0 #EPs= 5 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=125us
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=8f(I) Atr=03(Int.) MxPS=   2 Ivl=125us
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms
I:  If#= 1 Alt= 6 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=83(I) Atr=01(Isoc) MxPS=  63 Ivl=1ms
E:  Ad=03(O) Atr=01(Isoc) MxPS=  63 Ivl=1ms
I:* If#= 2 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E:  Ad=8a(I) Atr=03(Int.) MxPS=  64 Ivl=125us
E:  Ad=0a(O) Atr=03(Int.) MxPS=  64 Ivl=125us
I:  If#= 2 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E:  Ad=8a(I) Atr=03(Int.) MxPS= 512 Ivl=125us
E:  Ad=0a(O) Atr=03(Int.) MxPS= 512 Ivl=125us
I:* If#= 3 Alt= 0 #EPs= 9 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=08(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=06(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=07(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=09(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=86(I) Atr=03(Int.) MxPS=   2 Ivl=125us

Signed-off-by: Peter Tsao <peter.tsao@mediatek.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
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@Vudentz
Peter Tsao authored and Vudentz committed Aug 11, 2023
1 parent 8f0a378 commit 4c92ae7
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Showing 3 changed files with 64 additions and 20 deletions.
1 change: 1 addition & 0 deletions drivers/bluetooth/btmtk.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -289,3 +289,4 @@ MODULE_FIRMWARE(FIRMWARE_MT7622);
MODULE_FIRMWARE(FIRMWARE_MT7663);
MODULE_FIRMWARE(FIRMWARE_MT7668);
MODULE_FIRMWARE(FIRMWARE_MT7961);
MODULE_FIRMWARE(FIRMWARE_MT7925);
5 changes: 5 additions & 0 deletions drivers/bluetooth/btmtk.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
#define FIRMWARE_MT7663 "mediatek/mt7663pr2h.bin"
#define FIRMWARE_MT7668 "mediatek/mt7668pr2h.bin"
#define FIRMWARE_MT7961 "mediatek/BT_RAM_CODE_MT7961_1_2_hdr.bin"
#define FIRMWARE_MT7925 "mediatek/mt7925/BT_RAM_CODE_MT7925_1_1_hdr.bin"

#define HCI_EV_WMT 0xe4
#define HCI_WMT_MAX_EVENT_SIZE 64
Expand Down Expand Up @@ -119,6 +120,10 @@ struct btmtk_hci_wmt_params {
u32 *status;
};

struct btmediatek_data {
u32 dev_id;
};

typedef int (*wmt_cmd_sync_func_t)(struct hci_dev *,
struct btmtk_hci_wmt_params *);

Expand Down
78 changes: 58 additions & 20 deletions drivers/bluetooth/btusb.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2659,6 +2659,9 @@ static int btusb_recv_event_realtek(struct hci_dev *hdev, struct sk_buff *skb)
#define MTK_BT_RST_DONE 0x00000100
#define MTK_BT_RESET_WAIT_MS 100
#define MTK_BT_RESET_NUM_TRIES 10
#define MTK_BT_RESET_REG_CONNV3 0x70028610
#define MTK_BT_READ_DEV_ID 0x70010200


static void btusb_mtk_wmt_recv(struct urb *urb)
{
Expand Down Expand Up @@ -3039,10 +3042,11 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
struct sk_buff *skb;
const char *fwname;
int err, status;
u32 dev_id;
u32 dev_id = 0;
char fw_bin_name[64];
u32 fw_version = 0;
u8 param;
struct btmediatek_data *mediatek;

calltime = ktime_get();

Expand All @@ -3052,7 +3056,7 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
return err;
}

if (!dev_id) {
if (!dev_id || dev_id != 0x7663) {
err = btusb_mtk_id_get(data, 0x70010200, &dev_id);
if (err < 0) {
bt_dev_err(hdev, "Failed to get device id (%d)", err);
Expand All @@ -3065,6 +3069,9 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
}
}

mediatek = hci_get_priv(hdev);
mediatek->dev_id = dev_id;

switch (dev_id) {
case 0x7663:
fwname = FIRMWARE_MT7663;
Expand All @@ -3074,9 +3081,16 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
break;
case 0x7922:
case 0x7961:
snprintf(fw_bin_name, sizeof(fw_bin_name),
"mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
dev_id & 0xffff, (fw_version & 0xff) + 1);
case 0x7925:
if (dev_id == 0x7925)
snprintf(fw_bin_name, sizeof(fw_bin_name),
"mediatek/mt%04x/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
dev_id & 0xffff, dev_id & 0xffff, (fw_version & 0xff) + 1);
else
snprintf(fw_bin_name, sizeof(fw_bin_name),
"mediatek/BT_RAM_CODE_MT%04x_1_%x_hdr.bin",
dev_id & 0xffff, (fw_version & 0xff) + 1);

err = btmtk_setup_firmware_79xx(hdev, fw_bin_name,
btusb_mtk_hci_wmt_sync);
if (err < 0) {
Expand Down Expand Up @@ -3219,6 +3233,7 @@ static void btusb_mtk_cmd_timeout(struct hci_dev *hdev)
struct btusb_data *data = hci_get_drvdata(hdev);
u32 val;
int err, retry = 0;
struct btmediatek_data *mediatek;

/* It's MediaTek specific bluetooth reset mechanism via USB */
if (test_and_set_bit(BTUSB_HW_RESET_ACTIVE, &data->flags)) {
Expand All @@ -3232,22 +3247,42 @@ static void btusb_mtk_cmd_timeout(struct hci_dev *hdev)

btusb_stop_traffic(data);
usb_kill_anchored_urbs(&data->tx_anchor);
mediatek = hci_get_priv(hdev);

if (mediatek->dev_id == 0x7925) {
btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
val |= (1 << 5);
btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
val &= 0xFFFF00FF;
val |= (1 << 13);
btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, 0x00010001);
btusb_mtk_uhw_reg_read(data, MTK_BT_RESET_REG_CONNV3, &val);
val |= (1 << 0);
btusb_mtk_uhw_reg_write(data, MTK_BT_RESET_REG_CONNV3, val);
btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
msleep(100);
} else {
/* It's Device EndPoint Reset Option Register */
bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
btusb_mtk_uhw_reg_read(data, MTK_BT_WDT_STATUS, &val);

/* It's Device EndPoint Reset Option Register */
bt_dev_dbg(hdev, "Initiating reset mechanism via uhw");
btusb_mtk_uhw_reg_write(data, MTK_EP_RST_OPT, MTK_EP_RST_IN_OUT_OPT);
btusb_mtk_uhw_reg_read(data, MTK_BT_WDT_STATUS, &val);

/* Reset the bluetooth chip via USB interface. */
btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 1);
btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
/* MT7921 need to delay 20ms between toggle reset bit */
msleep(20);
btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0);
btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
/* Reset the bluetooth chip via USB interface. */
btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 1);
btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT, 0x000000FF);
btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT, &val);
btusb_mtk_uhw_reg_write(data, MTK_UDMA_INT_STA_BT1, 0x000000FF);
btusb_mtk_uhw_reg_read(data, MTK_UDMA_INT_STA_BT1, &val);
/* MT7921 need to delay 20ms between toggle reset bit */
msleep(20);
btusb_mtk_uhw_reg_write(data, MTK_BT_SUBSYS_RST, 0);
btusb_mtk_uhw_reg_read(data, MTK_BT_SUBSYS_RST, &val);
}

/* Poll the register until reset is completed */
do {
Expand Down Expand Up @@ -4289,6 +4324,9 @@ static int btusb_probe(struct usb_interface *intf,
priv_size += sizeof(struct btrealtek_data);

data->recv_event = btusb_recv_event_realtek;
} else if (id->driver_info & BTUSB_MEDIATEK) {
/* Allocate extra space for Mediatek device */
priv_size += sizeof(struct btmediatek_data);
}

data->recv_acl = hci_recv_frame;
Expand Down

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