[PATCH net-next 0/2] r8152: adjust flow for power cut

[PATCH net-next 0/2] r8152: adjust flow for power cut

[Hayes Wang]

The two patches are used to adjust the flow about resuming from
the state of power cut. For the purpose, some functions have to
be updated first.

Hayes Wang (2):
  r8152: replace several functions about phy patch request
  r8152: adjust the flow of power cut for RTL8153B

 drivers/net/usb/r8152.c | 150 ++++++++++++++++++++++++----------------
 1 file changed, 89 insertions(+), 61 deletions(-)

-- 
2.26.2

[PATCH net-next 1/2] r8152: replace several functions about phy patch request

[Hayes Wang]

Replace r8153_patch_request() with rtl_phy_patch_request().
Replace r8153_pre_ram_code() with rtl_pre_ram_code().
Replace r8153_post_ram_code() with rtl_post_ram_code().
Add rtl_patch_key_set().

The new functions have an additional parameter. It is used to wait
the patch request command finished. When the PHY is resumed from
the state of power cut, the PHY is at a safe mode and the
OCP_PHY_PATCH_STAT wouldn't be updated. For this situation, it is
safe to set patch request command without waiting OCP_PHY_PATCH_STAT.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
---
 drivers/net/usb/r8152.c | 84 ++++++++++++++++++++++++-----------------
 1 file changed, 50 insertions(+), 34 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 67cd6986634f..e792c1c69f14 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -3470,59 +3470,76 @@ static void rtl_clear_bp(struct r8152 *tp, u16 type)
 	ocp_write_word(tp, type, PLA_BP_BA, 0);
 }
 
-static int r8153_patch_request(struct r8152 *tp, bool request)
+static int rtl_phy_patch_request(struct r8152 *tp, bool request, bool wait)
 {
-	u16 data;
+	u16 data, check;
 	int i;
 
 	data = ocp_reg_read(tp, OCP_PHY_PATCH_CMD);
-	if (request)
+	if (request) {
 		data |= PATCH_REQUEST;
-	else
+		check = 0;
+	} else {
 		data &= ~PATCH_REQUEST;
+		check = PATCH_READY;
+	}
 	ocp_reg_write(tp, OCP_PHY_PATCH_CMD, data);
 
-	for (i = 0; request && i < 5000; i++) {
+	for (i = 0; wait && i < 5000; i++) {
+		u32 ocp_data;
+
 		usleep_range(1000, 2000);
-		if (ocp_reg_read(tp, OCP_PHY_PATCH_STAT) & PATCH_READY)
+		ocp_data = ocp_reg_read(tp, OCP_PHY_PATCH_STAT);
+		if ((ocp_data & PATCH_READY) ^ check)
 			break;
 	}
 
-	if (request && !(ocp_reg_read(tp, OCP_PHY_PATCH_STAT) & PATCH_READY)) {
-		netif_err(tp, drv, tp->netdev, "patch request fail\n");
-		r8153_patch_request(tp, false);
+	if (request && wait &&
+	    !(ocp_reg_read(tp, OCP_PHY_PATCH_STAT) & PATCH_READY)) {
+		dev_err(&tp->intf->dev, "PHY patch request fail\n");
+		rtl_phy_patch_request(tp, false, false);
 		return -ETIME;
 	} else {
 		return 0;
 	}
 }
 
-static int r8153_pre_ram_code(struct r8152 *tp, u16 key_addr, u16 patch_key)
+static void rtl_patch_key_set(struct r8152 *tp, u16 key_addr, u16 patch_key)
 {
-	if (r8153_patch_request(tp, true)) {
-		dev_err(&tp->intf->dev, "patch request fail\n");
-		return -ETIME;
-	}
+	if (patch_key && key_addr) {
+		sram_write(tp, key_addr, patch_key);
+		sram_write(tp, SRAM_PHY_LOCK, PHY_PATCH_LOCK);
+	} else if (key_addr) {
+		u16 data;
 
-	sram_write(tp, key_addr, patch_key);
-	sram_write(tp, SRAM_PHY_LOCK, PHY_PATCH_LOCK);
+		sram_write(tp, 0x0000, 0x0000);
 
-	return 0;
+		data = ocp_reg_read(tp, OCP_PHY_LOCK);
+		data &= ~PATCH_LOCK;
+		ocp_reg_write(tp, OCP_PHY_LOCK, data);
+
+		sram_write(tp, key_addr, 0x0000);
+	} else {
+		WARN_ON_ONCE(1);
+	}
 }
 
-static int r8153_post_ram_code(struct r8152 *tp, u16 key_addr)
+static int
+rtl_pre_ram_code(struct r8152 *tp, u16 key_addr, u16 patch_key, bool wait)
 {
-	u16 data;
+	if (rtl_phy_patch_request(tp, true, wait))
+		return -ETIME;
 
-	sram_write(tp, 0x0000, 0x0000);
+	rtl_patch_key_set(tp, key_addr, patch_key);
 
-	data = ocp_reg_read(tp, OCP_PHY_LOCK);
-	data &= ~PATCH_LOCK;
-	ocp_reg_write(tp, OCP_PHY_LOCK, data);
+	return 0;
+}
 
-	sram_write(tp, key_addr, 0x0000);
+static int rtl_post_ram_code(struct r8152 *tp, u16 key_addr, bool wait)
+{
+	rtl_patch_key_set(tp, key_addr, 0);
 
-	r8153_patch_request(tp, false);
+	rtl_phy_patch_request(tp, false, wait);
 
 	ocp_write_word(tp, MCU_TYPE_PLA, PLA_OCP_GPHY_BASE, tp->ocp_base);
 
@@ -4007,7 +4024,7 @@ static void rtl8152_fw_mac_apply(struct r8152 *tp, struct fw_mac *mac)
 	dev_dbg(&tp->intf->dev, "successfully applied %s\n", mac->info);
 }
 
-static void rtl8152_apply_firmware(struct r8152 *tp)
+static void rtl8152_apply_firmware(struct r8152 *tp, bool power_cut)
 {
 	struct rtl_fw *rtl_fw = &tp->rtl_fw;
 	const struct firmware *fw;
@@ -4038,12 +4055,11 @@ static void rtl8152_apply_firmware(struct r8152 *tp)
 		case RTL_FW_PHY_START:
 			key = (struct fw_phy_patch_key *)block;
 			key_addr = __le16_to_cpu(key->key_reg);
-			r8153_pre_ram_code(tp, key_addr,
-					   __le16_to_cpu(key->key_data));
+			rtl_pre_ram_code(tp, key_addr, __le16_to_cpu(key->key_data), !power_cut);
 			break;
 		case RTL_FW_PHY_STOP:
 			WARN_ON(!key_addr);
-			r8153_post_ram_code(tp, key_addr);
+			rtl_post_ram_code(tp, key_addr, !power_cut);
 			break;
 		case RTL_FW_PHY_NC:
 			rtl8152_fw_phy_nc_apply(tp, (struct fw_phy_nc *)block);
@@ -4248,7 +4264,7 @@ static void rtl8152_disable(struct r8152 *tp)
 
 static void r8152b_hw_phy_cfg(struct r8152 *tp)
 {
-	rtl8152_apply_firmware(tp);
+	rtl8152_apply_firmware(tp, false);
 	rtl_eee_enable(tp, tp->eee_en);
 	r8152_aldps_en(tp, true);
 	r8152b_enable_fc(tp);
@@ -4530,7 +4546,7 @@ static void r8153_hw_phy_cfg(struct r8152 *tp)
 	/* disable EEE before updating the PHY parameters */
 	rtl_eee_enable(tp, false);
 
-	rtl8152_apply_firmware(tp);
+	rtl8152_apply_firmware(tp, false);
 
 	if (tp->version == RTL_VER_03) {
 		data = ocp_reg_read(tp, OCP_EEE_CFG);
@@ -4604,7 +4620,7 @@ static void r8153b_hw_phy_cfg(struct r8152 *tp)
 	/* disable EEE before updating the PHY parameters */
 	rtl_eee_enable(tp, false);
 
-	rtl8152_apply_firmware(tp);
+	rtl8152_apply_firmware(tp, false);
 
 	r8153b_green_en(tp, test_bit(GREEN_ETHERNET, &tp->flags));
 
@@ -4645,7 +4661,7 @@ static void r8153b_hw_phy_cfg(struct r8152 *tp)
 	ocp_write_word(tp, MCU_TYPE_PLA, PLA_PHY_PWR, ocp_data);
 
 	/* Advnace EEE */
-	if (!r8153_patch_request(tp, true)) {
+	if (!rtl_phy_patch_request(tp, true, true)) {
 		data = ocp_reg_read(tp, OCP_POWER_CFG);
 		data |= EEE_CLKDIV_EN;
 		ocp_reg_write(tp, OCP_POWER_CFG, data);
@@ -4662,7 +4678,7 @@ static void r8153b_hw_phy_cfg(struct r8152 *tp)
 		ocp_reg_write(tp, OCP_SYSCLK_CFG, clk_div_expo(5));
 		tp->ups_info._250m_ckdiv = true;
 
-		r8153_patch_request(tp, false);
+		rtl_phy_patch_request(tp, false, true);
 	}
 
 	if (tp->eee_en)
-- 
2.26.2

[PATCH net-next 2/2] r8152: adjust the flow of power cut for RTL8153B

[Hayes Wang]

For runtime resuming, the RTL8153B may be resumed from the state
of power cut, when enabling the feature of UPS. Then, the PHY
would be reset, so it is necessary to be initailized again.

Besides, the USB_U1U2_TIMER also has to be set again, so I move
it from r8153b_init() to r8153b_hw_phy_cfg().

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
---
 drivers/net/usb/r8152.c | 68 ++++++++++++++++++++++++-----------------
 1 file changed, 40 insertions(+), 28 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index e792c1c69f14..d0048ebc114a 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1371,6 +1371,10 @@ void write_mii_word(struct net_device *netdev, int phy_id, int reg, int val)
 static int
 r8152_submit_rx(struct r8152 *tp, struct rx_agg *agg, gfp_t mem_flags);
 
+static int
+rtl8152_set_speed(struct r8152 *tp, u8 autoneg, u32 speed, u8 duplex,
+		  u32 advertising);
+
 static int rtl8152_set_mac_address(struct net_device *netdev, void *p)
 {
 	struct r8152 *tp = netdev_priv(netdev);
@@ -3207,8 +3211,6 @@ static void r8153b_ups_en(struct r8152 *tp, bool enable)
 		ocp_data |= BIT(0);
 		ocp_write_byte(tp, MCU_TYPE_USB, 0xcfff, ocp_data);
 	} else {
-		u16 data;
-
 		ocp_data &= ~(UPS_EN | USP_PREWAKE);
 		ocp_write_byte(tp, MCU_TYPE_USB, USB_POWER_CUT, ocp_data);
 
@@ -3216,31 +3218,20 @@ static void r8153b_ups_en(struct r8152 *tp, bool enable)
 		ocp_data &= ~BIT(0);
 		ocp_write_byte(tp, MCU_TYPE_USB, 0xcfff, ocp_data);
 
-		ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_MISC_0);
-		ocp_data &= ~PCUT_STATUS;
-		ocp_write_word(tp, MCU_TYPE_USB, USB_MISC_0, ocp_data);
-
-		data = r8153_phy_status(tp, 0);
-
-		switch (data) {
-		case PHY_STAT_PWRDN:
-		case PHY_STAT_EXT_INIT:
-			r8153b_green_en(tp,
-					test_bit(GREEN_ETHERNET, &tp->flags));
+		if (ocp_read_word(tp, MCU_TYPE_USB, USB_MISC_0) & PCUT_STATUS) {
+			int i;
 
-			data = r8152_mdio_read(tp, MII_BMCR);
-			data &= ~BMCR_PDOWN;
-			data |= BMCR_RESET;
-			r8152_mdio_write(tp, MII_BMCR, data);
+			for (i = 0; i < 500; i++) {
+				if (ocp_read_word(tp, MCU_TYPE_PLA, PLA_BOOT_CTRL) &
+				    AUTOLOAD_DONE)
+					break;
+				msleep(20);
+			}
 
-			data = r8153_phy_status(tp, PHY_STAT_LAN_ON);
-			fallthrough;
+			tp->rtl_ops.hw_phy_cfg(tp);
 
-		default:
-			if (data != PHY_STAT_LAN_ON)
-				netif_warn(tp, link, tp->netdev,
-					   "PHY not ready");
-			break;
+			rtl8152_set_speed(tp, tp->autoneg, tp->speed,
+					  tp->duplex, tp->advertising);
 		}
 	}
 }
@@ -4614,13 +4605,37 @@ static void r8153b_hw_phy_cfg(struct r8152 *tp)
 	u32 ocp_data;
 	u16 data;
 
+	ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_MISC_0);
+	if (ocp_data & PCUT_STATUS) {
+		ocp_data &= ~PCUT_STATUS;
+		ocp_write_word(tp, MCU_TYPE_USB, USB_MISC_0, ocp_data);
+	}
+
 	/* disable ALDPS before updating the PHY parameters */
 	r8153_aldps_en(tp, false);
 
 	/* disable EEE before updating the PHY parameters */
 	rtl_eee_enable(tp, false);
 
-	rtl8152_apply_firmware(tp, false);
+	/* U1/U2/L1 idle timer. 500 us */
+	ocp_write_word(tp, MCU_TYPE_USB, USB_U1U2_TIMER, 500);
+
+	data = r8153_phy_status(tp, 0);
+
+	switch (data) {
+	case PHY_STAT_PWRDN:
+	case PHY_STAT_EXT_INIT:
+		rtl8152_apply_firmware(tp, true);
+
+		data = r8152_mdio_read(tp, MII_BMCR);
+		data &= ~BMCR_PDOWN;
+		r8152_mdio_write(tp, MII_BMCR, data);
+		break;
+	case PHY_STAT_LAN_ON:
+	default:
+		rtl8152_apply_firmware(tp, false);
+		break;
+	}
 
 	r8153b_green_en(tp, test_bit(GREEN_ETHERNET, &tp->flags));
 
@@ -5546,9 +5561,6 @@ static void r8153b_init(struct r8152 *tp)
 	/* MSC timer = 0xfff * 8ms = 32760 ms */
 	ocp_write_word(tp, MCU_TYPE_USB, USB_MSC_TIMER, 0x0fff);
 
-	/* U1/U2/L1 idle timer. 500 us */
-	ocp_write_word(tp, MCU_TYPE_USB, USB_U1U2_TIMER, 500);
-
 	r8153b_power_cut_en(tp, false);
 	r8153b_ups_en(tp, false);
 	r8153_queue_wake(tp, false);
-- 
2.26.2

Re: [PATCH net-next 0/2] r8152: adjust flow for power cut

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (refs/heads/master):

On Wed, 3 Feb 2021 17:14:27 +0800 you wrote:
> The two patches are used to adjust the flow about resuming from
> the state of power cut. For the purpose, some functions have to
> be updated first.
> 
> Hayes Wang (2):
>   r8152: replace several functions about phy patch request
>   r8152: adjust the flow of power cut for RTL8153B
> 
> [...]

Here is the summary with links:
  - [net-next,1/2] r8152: replace several functions about phy patch request
    https://git.kernel.org/netdev/net-next/c/a08c0d309d8c
  - [net-next,2/2] r8152: adjust the flow of power cut for RTL8153B
    https://git.kernel.org/netdev/net-next/c/80fd850b31f0

You are awesome, thank you!
--
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