Linux-USB Archive on lore.kernel.org
 help / color / Atom feed
* [PATCH v3] r8152: Add macpassthru support for ThinkPad Thunderbolt 3 Dock Gen 2
@ 2019-11-05 11:24 Kai-Heng Feng
  2019-11-05 11:52 ` Hayes Wang
  2019-11-06  2:30 ` David Miller
  0 siblings, 2 replies; 3+ messages in thread
From: Kai-Heng Feng @ 2019-11-05 11:24 UTC (permalink / raw)
  To: davem, oliver; +Cc: hayeswang, linux-usb, netdev, linux-kernel, Kai-Heng Feng

ThinkPad Thunderbolt 3 Dock Gen 2 is another docking station that uses
RTL8153 based USB ethernet.

The device supports macpassthru, but it failed to pass the test of -AD,
-BND and -BD. Simply bypass these tests since the device supports this
feature just fine.

Also the ACPI objects have some differences between Dell's and Lenovo's,
so make those ACPI infos no longer hardcoded.

BugLink: https://bugs.launchpad.net/bugs/1827961
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
---
v3:
- Simplify the logic of bypassing macpassthru test.
v2:
- Use idVendor and idProduct directly.

 drivers/net/usb/cdc_ether.c |  7 +++++
 drivers/net/usb/r8152.c     | 58 +++++++++++++++++++++++++------------
 2 files changed, 46 insertions(+), 19 deletions(-)

diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c
index fe630438f67b..0cdb2ce47645 100644
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -766,6 +766,13 @@ static const struct usb_device_id	products[] = {
 	.driver_info = 0,
 },
 
+/* ThinkPad Thunderbolt 3 Dock Gen 2 (based on Realtek RTL8153) */
+{
+	USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x3082, USB_CLASS_COMM,
+			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
+	.driver_info = 0,
+},
+
 /* Lenovo Thinkpad USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
 {
 	USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x7205, USB_CLASS_COMM,
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index b9f526ed0d30..ac079395c8d4 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -670,6 +670,7 @@ enum rtl8152_flags {
 	SCHEDULE_TASKLET,
 	GREEN_ETHERNET,
 	DELL_TB_RX_AGG_BUG,
+	LENOVO_MACPASSTHRU,
 };
 
 /* Define these values to match your device */
@@ -1408,38 +1409,52 @@ static int vendor_mac_passthru_addr_read(struct r8152 *tp, struct sockaddr *sa)
 	int ret = -EINVAL;
 	u32 ocp_data;
 	unsigned char buf[6];
-
-	/* test for -AD variant of RTL8153 */
-	ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_MISC_0);
-	if ((ocp_data & AD_MASK) == 0x1000) {
-		/* test for MAC address pass-through bit */
-		ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, EFUSE);
-		if ((ocp_data & PASS_THRU_MASK) != 1) {
-			netif_dbg(tp, probe, tp->netdev,
-				  "No efuse for RTL8153-AD MAC pass through\n");
-			return -ENODEV;
-		}
+	char *mac_obj_name;
+	acpi_object_type mac_obj_type;
+	int mac_strlen;
+
+	if (test_bit(LENOVO_MACPASSTHRU, &tp->flags)) {
+		mac_obj_name = "\\MACA";
+		mac_obj_type = ACPI_TYPE_STRING;
+		mac_strlen = 0x16;
 	} else {
-		/* test for RTL8153-BND and RTL8153-BD */
-		ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_MISC_1);
-		if ((ocp_data & BND_MASK) == 0 && (ocp_data & BD_MASK) == 0) {
-			netif_dbg(tp, probe, tp->netdev,
-				  "Invalid variant for MAC pass through\n");
-			return -ENODEV;
+		/* test for -AD variant of RTL8153 */
+		ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_MISC_0);
+		if ((ocp_data & AD_MASK) == 0x1000) {
+			/* test for MAC address pass-through bit */
+			ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, EFUSE);
+			if ((ocp_data & PASS_THRU_MASK) != 1) {
+				netif_dbg(tp, probe, tp->netdev,
+						"No efuse for RTL8153-AD MAC pass through\n");
+				return -ENODEV;
+			}
+		} else {
+			/* test for RTL8153-BND and RTL8153-BD */
+			ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_MISC_1);
+			if ((ocp_data & BND_MASK) == 0 && (ocp_data & BD_MASK) == 0) {
+				netif_dbg(tp, probe, tp->netdev,
+						"Invalid variant for MAC pass through\n");
+				return -ENODEV;
+			}
 		}
+
+		mac_obj_name = "\\_SB.AMAC";
+		mac_obj_type = ACPI_TYPE_BUFFER;
+		mac_strlen = 0x17;
 	}
 
 	/* returns _AUXMAC_#AABBCCDDEEFF# */
-	status = acpi_evaluate_object(NULL, "\\_SB.AMAC", NULL, &buffer);
+	status = acpi_evaluate_object(NULL, mac_obj_name, NULL, &buffer);
 	obj = (union acpi_object *)buffer.pointer;
 	if (!ACPI_SUCCESS(status))
 		return -ENODEV;
-	if (obj->type != ACPI_TYPE_BUFFER || obj->string.length != 0x17) {
+	if (obj->type != mac_obj_type || obj->string.length != mac_strlen) {
 		netif_warn(tp, probe, tp->netdev,
 			   "Invalid buffer for pass-thru MAC addr: (%d, %d)\n",
 			   obj->type, obj->string.length);
 		goto amacout;
 	}
+
 	if (strncmp(obj->string.pointer, "_AUXMAC_#", 9) != 0 ||
 	    strncmp(obj->string.pointer + 0x15, "#", 1) != 0) {
 		netif_warn(tp, probe, tp->netdev,
@@ -6629,6 +6644,10 @@ static int rtl8152_probe(struct usb_interface *intf,
 		netdev->hw_features &= ~NETIF_F_RXCSUM;
 	}
 
+	if (le16_to_cpu(udev->descriptor.idVendor) == VENDOR_ID_LENOVO &&
+	    le16_to_cpu(udev->descriptor.idProduct) == 0x3082)
+		set_bit(LENOVO_MACPASSTHRU, &tp->flags);
+
 	if (le16_to_cpu(udev->descriptor.bcdDevice) == 0x3011 && udev->serial &&
 	    (!strcmp(udev->serial, "000001000000") ||
 	     !strcmp(udev->serial, "000002000000"))) {
@@ -6755,6 +6774,7 @@ static const struct usb_device_id rtl8152_table[] = {
 	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x304f)},
 	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x3062)},
 	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x3069)},
+	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x3082)},
 	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x7205)},
 	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x720c)},
 	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x7214)},
-- 
2.17.1


^ permalink raw reply	[flat|nested] 3+ messages in thread

* RE: [PATCH v3] r8152: Add macpassthru support for ThinkPad Thunderbolt 3 Dock Gen 2
  2019-11-05 11:24 [PATCH v3] r8152: Add macpassthru support for ThinkPad Thunderbolt 3 Dock Gen 2 Kai-Heng Feng
@ 2019-11-05 11:52 ` Hayes Wang
  2019-11-06  2:30 ` David Miller
  1 sibling, 0 replies; 3+ messages in thread
From: Hayes Wang @ 2019-11-05 11:52 UTC (permalink / raw)
  To: Kai-Heng Feng, davem, oliver; +Cc: linux-usb, netdev, linux-kernel

Kai-Heng Feng [mailto:kai.heng.feng@canonical.com]
> Sent: Tuesday, November 05, 2019 7:25 PM
> To: davem@davemloft.net; oliver@neukum.org
> Cc: Hayes Wang; linux-usb@vger.kernel.org; netdev@vger.kernel.org;
> linux-kernel@vger.kernel.org; Kai-Heng Feng
> Subject: [PATCH v3] r8152: Add macpassthru support for ThinkPad Thunderbolt
> 3 Dock Gen 2
> 
> ThinkPad Thunderbolt 3 Dock Gen 2 is another docking station that uses
> RTL8153 based USB ethernet.
> 
> The device supports macpassthru, but it failed to pass the test of -AD,
> -BND and -BD. Simply bypass these tests since the device supports this
> feature just fine.
> 
> Also the ACPI objects have some differences between Dell's and Lenovo's,
> so make those ACPI infos no longer hardcoded.
> 
> BugLink: https://bugs.launchpad.net/bugs/1827961
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
> ---

Acked-by: Hayes Wang <hayeswang@realtek.com>

Best Regards,
Hayes



^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH v3] r8152: Add macpassthru support for ThinkPad Thunderbolt 3 Dock Gen 2
  2019-11-05 11:24 [PATCH v3] r8152: Add macpassthru support for ThinkPad Thunderbolt 3 Dock Gen 2 Kai-Heng Feng
  2019-11-05 11:52 ` Hayes Wang
@ 2019-11-06  2:30 ` David Miller
  1 sibling, 0 replies; 3+ messages in thread
From: David Miller @ 2019-11-06  2:30 UTC (permalink / raw)
  To: kai.heng.feng; +Cc: oliver, hayeswang, linux-usb, netdev, linux-kernel

From: Kai-Heng Feng <kai.heng.feng@canonical.com>
Date: Tue,  5 Nov 2019 19:24:52 +0800

> ThinkPad Thunderbolt 3 Dock Gen 2 is another docking station that uses
> RTL8153 based USB ethernet.
> 
> The device supports macpassthru, but it failed to pass the test of -AD,
> -BND and -BD. Simply bypass these tests since the device supports this
> feature just fine.
> 
> Also the ACPI objects have some differences between Dell's and Lenovo's,
> so make those ACPI infos no longer hardcoded.
> 
> BugLink: https://bugs.launchpad.net/bugs/1827961
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
> ---
> v3:
> - Simplify the logic of bypassing macpassthru test.
> v2:
> - Use idVendor and idProduct directly.

Applied to net-next, thank you.

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, back to index

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-11-05 11:24 [PATCH v3] r8152: Add macpassthru support for ThinkPad Thunderbolt 3 Dock Gen 2 Kai-Heng Feng
2019-11-05 11:52 ` Hayes Wang
2019-11-06  2:30 ` David Miller

Linux-USB Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-usb/0 linux-usb/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-usb linux-usb/ https://lore.kernel.org/linux-usb \
		linux-usb@vger.kernel.org
	public-inbox-index linux-usb

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-usb


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git