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r8152: reset the bmu 

Reset the BMU to clear the rx/tx fifo. This avoids that the unexpected
data remains in the hw.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
hayeswang 2016-06-16 10:55:18 +08:00 committed by David S. Miller
parent 4e384ac19b
commit 93fe9b1838
1 changed files with 19 additions and 0 deletions
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19
drivers/net/usb/r8152.c
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@ -116,6 +116,7 @@
#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
@ -338,6 +339,10 @@
#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
@ -2456,6 +2461,17 @@ static void r8153_teredo_off(struct r8152 *tp)
ocp_write_dword(tp, MCU_TYPE_PLA, PLA_TEREDO_TIMER, 0);
}
static void rtl_reset_bmu(struct r8152 *tp)
{
u32 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 void r8152_aldps_en(struct r8152 *tp, bool enable)
{
if (enable) {
@ -2681,6 +2697,7 @@ 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;
@ -2742,6 +2759,7 @@ 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);
for (i = 0; i < 1000; i++) {
ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_OOB_CTRL);
@ -2803,6 +2821,7 @@ static void rtl8153_disable(struct r8152 *tp)
{
r8153_aldps_en(tp, false);
rtl_disable(tp);
rtl_reset_bmu(tp);
r8153_aldps_en(tp, true);
usb_enable_lpm(tp->udev);
}