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r8152: Add support for MAC address pass through on RTL8153-BND

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All previous docks and dongles that have supported this feature use
the RTL8153-AD chip.

RTL8153-BND is a new chip that will be used in upcoming Dell type-C docks.
It should be added to the whitelist of devices to activate MAC address
pass through.

Per confirming with Realtek all devices containing RTL8153-BND should
activate MAC pass through and there won't use pass through bit on efuse
like in RTL8153-AD.

Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mario Limonciello 2018-12-11 08:16:14 -06:00 committed by David S. Miller
parent 0c3a16be70
commit 9c27369f4a
1 changed files with 22 additions and 11 deletions
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33
drivers/net/usb/r8152.c
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@ -129,6 +129,7 @@
#define USB_UPS_CTRL 0xd800
#define USB_POWER_CUT 0xd80a
#define USB_MISC_0 0xd81a
#define USB_MISC_1 0xd81f
#define USB_AFE_CTRL2 0xd824
#define USB_UPS_CFG 0xd842
#define USB_UPS_FLAGS 0xd848
@ -555,6 +556,7 @@ enum spd_duplex {
/* MAC PASSTHRU */
#define AD_MASK 0xfee0
#define BND_MASK 0x0004
#define EFUSE 0xcfdb
#define PASS_THRU_MASK 0x1
@ -1150,7 +1152,7 @@ out1:
return ret;
}
/* Devices containing RTL8153-AD can support a persistent
/* Devices containing proper chips can support a persistent
* host system provided MAC address.
* Examples of this are Dell TB15 and Dell WD15 docks
*/
@ -1165,13 +1167,23 @@ static int vendor_mac_passthru_addr_read(struct r8152 *tp, struct sockaddr *sa)
/* test for -AD variant of RTL8153 */
ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_MISC_0);
if ((ocp_data & AD_MASK) != 0x1000)
return -ENODEV;
/* test for MAC address pass-through bit */
ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, EFUSE);
if ((ocp_data & PASS_THRU_MASK) != 1)
return -ENODEV;
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 */
ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_MISC_1);
if ((ocp_data & BND_MASK) == 0) {
netif_dbg(tp, probe, tp->netdev,
"Invalid variant for MAC pass through\n");
return -ENODEV;
}
}
/* returns _AUXMAC_#AABBCCDDEEFF# */
status = acpi_evaluate_object(NULL, "\\_SB.AMAC", NULL, &buffer);
@ -1217,9 +1229,8 @@ static int set_ethernet_addr(struct r8152 *tp)
if (tp->version == RTL_VER_01) {
ret = pla_ocp_read(tp, PLA_IDR, 8, sa.sa_data);
} else {
/* if this is not an RTL8153-AD, no eFuse mac pass thru set,
* or system doesn't provide valid _SB.AMAC this will be
* be expected to non-zero
/* if device doesn't support MAC pass through this will
* be expected to be non-zero
*/
ret = vendor_mac_passthru_addr_read(tp, &sa);
if (ret < 0)