APPLIED(unstable): [Unstable] [PATCH 1/1] r8152: Add macpassthru support for ThinkPad Thunderbolt 3 Dock Gen 2
Andrea Righi
andrea.righi at canonical.com
Thu Nov 28 13:37:01 UTC 2019
On Wed, Nov 13, 2019 at 11:52:33AM +0800, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1827961
>
> 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 at canonical.com>
> Acked-by: Hayes Wang <hayeswang at realtek.com>
> Signed-off-by: David S. Miller <davem at davemloft.net>
> (cherry picked from commit 9647722befbedcd6735e00655ffec392c05f0c56 linux-next)
> Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
> ---
> 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 d4a95b50bda6..014655ca37f2 100644
> --- a/drivers/net/usb/r8152.c
> +++ b/drivers/net/usb/r8152.c
> @@ -622,6 +622,7 @@ enum rtl8152_flags {
> SCHEDULE_TASKLET,
> GREEN_ETHERNET,
> DELL_TB_RX_AGG_BUG,
> + LENOVO_MACPASSTHRU,
> };
>
> /* Define these values to match your device */
> @@ -1222,38 +1223,52 @@ 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,
> @@ -5632,6 +5647,10 @@ 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"))) {
> dev_info(&udev->dev, "Dell TB16 Dock, disable RX aggregation");
> @@ -5752,6 +5771,7 @@ 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
>
>
> --
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