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r8152: fix the force speed doesn't work for RTL8156

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It needs to set mdio force mode. Otherwise, link off always occurs when
setting force speed.

Fixes: 195aae321c ("r8152: support new chips")
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Hayes Wang 2021-12-23 17:27:01 +08:00 committed by Jakub Kicinski
parent d95a56207c
commit 45bf944e67
1 changed files with 17 additions and 0 deletions
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17
drivers/net/usb/r8152.c
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@ -6584,6 +6584,21 @@ static bool rtl8153_in_nway(struct r8152 *tp)
return true;
}
static void r8156_mdio_force_mode(struct r8152 *tp)
{
u16 data;
/* Select force mode through 0xa5b4 bit 15
* 0: MDIO force mode
* 1: MMD force mode
*/
data = ocp_reg_read(tp, 0xa5b4);
if (data & BIT(15)) {
data &= ~BIT(15);
ocp_reg_write(tp, 0xa5b4, data);
}
}
static void set_carrier(struct r8152 *tp)
{
struct net_device *netdev = tp->netdev;
@ -8016,6 +8031,7 @@ static void r8156_init(struct r8152 *tp)
ocp_data |= ACT_ODMA;
ocp_write_byte(tp, MCU_TYPE_USB, USB_BMU_CONFIG, ocp_data);
r8156_mdio_force_mode(tp);
rtl_tally_reset(tp);
tp->coalesce = 15000; /* 15 us */
@ -8145,6 +8161,7 @@ static void r8156b_init(struct r8152 *tp)
ocp_data &= ~(RX_AGG_DISABLE | RX_ZERO_EN);
ocp_write_word(tp, MCU_TYPE_USB, USB_USB_CTRL, ocp_data);
r8156_mdio_force_mode(tp);
rtl_tally_reset(tp);
tp->coalesce = 15000; /* 15 us */