diff options
| author | Hayes Wang <hayeswang@realtek.com> | 2020-06-16 17:09:44 +0800 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2020-09-01 14:47:36 +0200 |
| commit | d74a76234f1bbbb9c6266ebe55ce53be99a6df19 (patch) | |
| tree | 5c33cad5161f198e86d4eb8fd7de7b8b9e43867a /drivers/usb | |
| parent | 23e333a5c083a000d0cabc53f7c0d261bae9e5ca (diff) | |
eth/r8152: reset bmu after disabling Tx/Rx
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/eth/r8152.c | 14 | ||||
| -rw-r--r-- | drivers/usb/eth/r8152.h | 7 |
2 files changed, 20 insertions, 1 deletions
diff --git a/drivers/usb/eth/r8152.c b/drivers/usb/eth/r8152.c index 1845d957f9..8cefacbd7e 100644 --- a/drivers/usb/eth/r8152.c +++ b/drivers/usb/eth/r8152.c @@ -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) diff --git a/drivers/usb/eth/r8152.h b/drivers/usb/eth/r8152.h index 10e0da8eb1..4daf4ee87d 100644 --- a/drivers/usb/eth/r8152.h +++ b/drivers/usb/eth/r8152.h @@ -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 |