diff options
| author |   Hayes Wang <hayeswang@realtek.com> | 2020-01-22 16:02:09 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-01-23 11:20:57 +0100 |
| commit | 08997b5eec08a2c29367f19a74abdea54b299406 (patch) | |
| tree | 581c525fb40feb146959251ea59f591b299710d2 /drivers/net/usb | |
| parent | r8152: disable U2P3 for RTL8153B (diff) | |
| download | linux-dev-08997b5eec08a2c29367f19a74abdea54b299406.tar.xz linux-dev-08997b5eec08a2c29367f19a74abdea54b299406.zip | |
r8152: Disable PLA MCU clock speed down
PLA MCU clock speed down could only be enabled when tx/rx are disabled.
Otherwise, the packet loss may occur.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb')
| -rw-r--r-- | drivers/net/usb/r8152.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index bc6b2f8aaa7e..1fb85c79bd33 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -324,6 +324,7 @@ #define MAC_CLK_SPDWN_EN BIT(15) /* PLA_MAC_PWR_CTRL3 */ +#define PLA_MCU_SPDWN_EN BIT(14) #define PKT_AVAIL_SPDWN_EN 0x0100 #define SUSPEND_SPDWN_EN 0x0004 #define U1U2_SPDWN_EN 0x0002 @@ -5005,6 +5006,8 @@ static void rtl8153_down(struct r8152 *tp) static void rtl8153b_up(struct r8152 *tp) { + u32 ocp_data; + if (test_bit(RTL8152_UNPLUG, &tp->flags)) return; @@ -5015,17 +5018,27 @@ static void rtl8153b_up(struct r8152 *tp) r8153_first_init(tp); ocp_write_dword(tp, MCU_TYPE_USB, USB_RX_BUF_TH, RX_THR_B); + ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3); + ocp_data &= ~PLA_MCU_SPDWN_EN; + ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3, ocp_data); + r8153_aldps_en(tp, true); r8153b_u1u2en(tp, true); } static void rtl8153b_down(struct r8152 *tp) { + u32 ocp_data; + if (test_bit(RTL8152_UNPLUG, &tp->flags)) { rtl_drop_queued_tx(tp); return; } + ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3); + ocp_data |= PLA_MCU_SPDWN_EN; + ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3, ocp_data); + r8153b_u1u2en(tp, false); r8153_u2p3en(tp, false); r8153b_power_cut_en(tp, false); @@ -5521,6 +5534,10 @@ static void r8153b_init(struct r8152 *tp) ocp_data |= MAC_CLK_SPDWN_EN; ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL2, ocp_data); + ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3); + ocp_data &= ~PLA_MCU_SPDWN_EN; + ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3, ocp_data); + set_bit(GREEN_ETHERNET, &tp->flags); /* rx aggregation */ |