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eth/r8152: reset bmu after disabling Tx/Rx

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Reset bmu after disabling Tx/Rx. This is used to clear the FIFO of
Tx/Rx. The remained data may be transferred after Tx/Rx is re-enabled.
And it results in garbage data.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
This commit is contained in:
Hayes Wang 2020-06-16 17:09:44 +08:00 committed by Marek Vasut
parent 23e333a5c0
commit d74a76234f
2 changed files with 20 additions and 1 deletions
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14
drivers/usb/eth/r8152.c
View file

@ -568,6 +568,17 @@ static void r8153_power_cut_en(struct r8152 *tp, bool enable)
ocp_write_word(tp, MCU_TYPE_USB, USB_MISC_0, ocp_data);
}
static void rtl_reset_bmu(struct r8152 *tp)
{
u8 ocp_data;
ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_BMU_RESET);
ocp_data &= ~(BMU_RESET_EP_IN | BMU_RESET_EP_OUT);
ocp_write_byte(tp, MCU_TYPE_USB, USB_BMU_RESET, ocp_data);
ocp_data |= BMU_RESET_EP_IN | BMU_RESET_EP_OUT;
ocp_write_byte(tp, MCU_TYPE_USB, USB_BMU_RESET, ocp_data);
}
static int r8152_read_mac(struct r8152 *tp, unsigned char *macaddr)
{
int ret;
@ -786,6 +797,7 @@ static void r8153_first_init(struct r8152 *tp)
r8153_hw_phy_cfg(tp);
rtl8152_nic_reset(tp);
rtl_reset_bmu(tp);
ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
ocp_data &= ~NOW_IS_OOB;
@ -832,6 +844,7 @@ static void r8153_enter_oob(struct r8152 *tp)
ocp_write_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL, ocp_data);
rtl_disable(tp);
rtl_reset_bmu(tp);
rtl8152_reinit_ll(tp);
@ -873,6 +886,7 @@ static void rtl8153_disable(struct r8152 *tp)
{
r8153_disable_aldps(tp);
rtl_disable(tp);
rtl_reset_bmu(tp);
}
static int rtl8152_set_speed(struct r8152 *tp, u8 autoneg, u16 speed, u8 duplex)

7
drivers/usb/eth/r8152.h
View file

@ -89,9 +89,10 @@
#define USB_TX_DMA 0xd434
#define USB_TOLERANCE 0xd490
#define USB_LPM_CTRL 0xd41a
#define USB_BMU_RESET 0xd4b0
#define USB_UPS_CTRL 0xd800
#define USB_MISC_0 0xd81a
#define USB_POWER_CUT 0xd80a
#define USB_MISC_0 0xd81a
#define USB_AFE_CTRL2 0xd824
#define USB_WDT11_CTRL 0xe43c
#define USB_BP_BA 0xfc26
@ -324,6 +325,10 @@
#define TEST_MODE_DISABLE 0x00000001
#define TX_SIZE_ADJUST1 0x00000100
/* USB_BMU_RESET */
#define BMU_RESET_EP_IN 0x01
#define BMU_RESET_EP_OUT 0x02
/* USB_UPS_CTRL */
#define POWER_CUT 0x0100