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Subject[PATCH net] r8152: restore hw settings
Date
There is a capability which let the hw could change the settings
automatically when the power change to ON. However, the USB reset
would reset the settings to the hw default, so the driver has to
restore the relative settings. Otherwise, it would influence the
functions of the hw, and the compatibility for the USB hub and
USB host controller.

The relative settings are as following.
- set the power down scale to 96.
- enable the power saving function of USB 2.0.
- disable the ALDPS of ECM mode.
- set burst mode depending on the burst size.
- enable the flow control of endpoint full.
- set fifo empty boundary to 32448 bytes.
- enable the function of exiting LPM when Rx OK occurs.
- set the connect timer to 1.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
---
drivers/net/usb/r8152.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 57 insertions(+), 2 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 5980ac6..438fc6b 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -40,6 +40,7 @@
#define PLA_RXFIFO_CTRL0 0xc0a0
#define PLA_RXFIFO_CTRL1 0xc0a4
#define PLA_RXFIFO_CTRL2 0xc0a8
+#define PLA_DMY_REG0 0xc0b0
#define PLA_FMC 0xc0b4
#define PLA_CFG_WOL 0xc0b6
#define PLA_TEREDO_CFG 0xc0bc
@@ -90,8 +91,14 @@
#define PLA_BP_7 0xfc36
#define PLA_BP_EN 0xfc38

+#define USB_USB2PHY 0xb41e
+#define USB_SSPHYLINK2 0xb428
#define USB_U2P3_CTRL 0xb460
+#define USB_CSR_DUMMY1 0xb464
+#define USB_CSR_DUMMY2 0xb466
#define USB_DEV_STAT 0xb808
+#define USB_CONNECT_TIMER 0xcbf8
+#define USB_BURST_SIZE 0xcfc0
#define USB_USB_CTRL 0xd406
#define USB_PHY_CTRL 0xd408
#define USB_TX_AGG 0xd40a
@@ -170,6 +177,9 @@
#define TXFIFO_THR_NORMAL 0x00400008
#define TXFIFO_THR_NORMAL2 0x01000008

+/* PLA_DMY_REG0 */
+#define ECM_ALDPS 0x0002
+
/* PLA_FMC */
#define FMC_FCR_MCU_EN 0x0001

@@ -289,6 +299,20 @@
/* PLA_BOOT_CTRL */
#define AUTOLOAD_DONE 0x0002

+/* USB_USB2PHY */
+#define USB2PHY_SUSPEND 0x0001
+#define USB2PHY_L1 0x0002
+
+/* USB_SSPHYLINK2 */
+#define pwd_dn_scale_mask 0x3ffe
+#define pwd_dn_scale(x) ((x) << 1)
+
+/* USB_CSR_DUMMY1 */
+#define DYNAMIC_BURST 0x0001
+
+/* USB_CSR_DUMMY2 */
+#define EP4_FULL_FC 0x0001
+
/* USB_DEV_STAT */
#define STAT_SPEED_MASK 0x0006
#define STAT_SPEED_HIGH 0x0000
@@ -334,9 +358,13 @@
#define TIMER11_EN 0x0001

/* USB_LPM_CTRL */
+/* bit 4 ~ 5: fifo empty boundary */
+#define FIFO_EMPTY_1FB 0x30 /* 0x1fb * 64 = 32448 bytes */
+/* bit 2 ~ 3: LMP timer */
#define LPM_TIMER_MASK 0x0c
#define LPM_TIMER_500MS 0x04 /* 500 ms */
#define LPM_TIMER_500US 0x0c /* 500 us */
+#define ROK_EXIT_LPM 0x02

/* USB_AFE_CTRL2 */
#define SEN_VAL_MASK 0xf800
@@ -3230,6 +3258,32 @@ static void r8153_init(struct r8152 *tp)

r8153_u2p3en(tp, false);

+ if (tp->version == RTL_VER_04) {
+ ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_SSPHYLINK2);
+ ocp_data &= ~pwd_dn_scale_mask;
+ ocp_data |= pwd_dn_scale(96);
+ ocp_write_word(tp, MCU_TYPE_USB, USB_SSPHYLINK2, ocp_data);
+
+ ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_USB2PHY);
+ ocp_data |= USB2PHY_L1 | USB2PHY_SUSPEND;
+ ocp_write_byte(tp, MCU_TYPE_USB, USB_USB2PHY, ocp_data);
+ } else if (tp->version == RTL_VER_05) {
+ ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_DMY_REG0);
+ ocp_data &= ~ECM_ALDPS;
+ ocp_write_byte(tp, MCU_TYPE_PLA, PLA_DMY_REG0, ocp_data);
+
+ ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_CSR_DUMMY1);
+ if (ocp_read_word(tp, MCU_TYPE_USB, USB_BURST_SIZE) == 0)
+ ocp_data &= ~DYNAMIC_BURST;
+ else
+ ocp_data |= DYNAMIC_BURST;
+ ocp_write_byte(tp, MCU_TYPE_USB, USB_CSR_DUMMY1, ocp_data);
+ }
+
+ ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_CSR_DUMMY2);
+ ocp_data |= EP4_FULL_FC;
+ ocp_write_byte(tp, MCU_TYPE_USB, USB_CSR_DUMMY2, ocp_data);
+
ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_WDT11_CTRL);
ocp_data &= ~TIMER11_EN;
ocp_write_word(tp, MCU_TYPE_USB, USB_WDT11_CTRL, ocp_data);
@@ -3238,8 +3292,7 @@ static void r8153_init(struct r8152 *tp)
ocp_data &= ~LED_MODE_MASK;
ocp_write_word(tp, MCU_TYPE_PLA, PLA_LED_FEATURE, ocp_data);

- ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_LPM_CTRL);
- ocp_data &= ~LPM_TIMER_MASK;
+ ocp_data = FIFO_EMPTY_1FB | ROK_EXIT_LPM;
if (tp->version == RTL_VER_04 && tp->udev->speed != USB_SPEED_SUPER)
ocp_data |= LPM_TIMER_500MS;
else
@@ -3251,6 +3304,8 @@ static void r8153_init(struct r8152 *tp)
ocp_data |= SEN_VAL_NORMAL | SEL_RXIDLE;
ocp_write_word(tp, MCU_TYPE_USB, USB_AFE_CTRL2, ocp_data);

+ ocp_write_word(tp, MCU_TYPE_USB, USB_CONNECT_TIMER, 0x0001);
+
r8153_power_cut_en(tp, false);
r8153_u1u2en(tp, true);

--
2.1.0


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