[PATCH 5.4 78/90] r8152: disable test IO for RTL8153B

Greg Kroah-Hartman
2020-02-03T16:36:50Z

From: Hayes Wang <hayeswang@realtek.com>

[ Upstream commit d7f1b59655efb5a285d227c8f9853a98eab5c2fd ]

For RTL8153B with QFN32, disable test IO. Otherwise, it may cause
abnormal behavior for the device randomly.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/usb/r8152.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 2d3374a373f83..1f61859baa531 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -298,6 +298,7 @@
/* PLA_PHY_PWR */
#define TX_10M_IDLE_EN 0x0080
#define PFM_PWM_SWITCH 0x0040
+#define TEST_IO_OFF BIT(4)

/* PLA_MAC_PWR_CTRL */
#define D3_CLK_GATED_EN 0x00004000
@@ -4540,6 +4541,15 @@ static void r8153b_init(struct r8152 *tp)
ocp_data &= ~PLA_MCU_SPDWN_EN;
ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3, ocp_data);

+ if (tp->version == RTL_VER_09) {
+ /* Disable Test IO for 32QFN */
+ if (ocp_read_byte(tp, MCU_TYPE_PLA, 0xdc00) & BIT(5)) {
+ ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_PHY_PWR);
+ ocp_data |= TEST_IO_OFF;
+ ocp_write_word(tp, MCU_TYPE_PLA, PLA_PHY_PWR, ocp_data);
+ }
+ }
+
set_bit(GREEN_ETHERNET, &tp->flags);

/* rx aggregation */
--
2.20.1