Merge branch 'r8152-adjust-flow-for-power-cut'

Hayes Wang says:

====================
r8152: adjust flow for power cut

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.
====================

Link: https://lore.kernel.org/r/1394712342-15778-398-Taiwan-albertk@realtek.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

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);
@@ -3205,8 +3209,6 @@ 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);
 
@@ -3214,31 +3216,20 @@ 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);
 		}
 	}
 }
@@ -3468,59 +3459,76 @@ 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);
 
@@ -4005,7 +4013,7 @@ 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;
@@ -4036,12 +4044,11 @@ 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);
@@ -4246,7 +4253,7 @@ 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);
@@ -4528,7 +4535,7 @@ 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);
@@ -4596,13 +4603,37 @@ 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);
+	/* 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));
 
@@ -4643,7 +4674,7 @@ 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);
@@ -4660,7 +4691,7 @@ 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)
@@ -5528,9 +5559,6 @@ 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);