bnx2x: Supporting BCM8726 PHY

Also adding the ability to recognize the optic module and disable it if it is
not authorized for safety reasons - since this feature might upset some users
which are willing to take the risk, it is optional and can be disabled by
setting an nvram bit (or a trivial driver patch to set this bit).
This dual port PHY requires special handling if the ports are swapped.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bnx2x_hsi.h

@@ -245,7 +245,7 @@ struct port_hw_cfg {			    /* port 0: 0x12c  port 1: 0x2bc */
 #define PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8073	    0x00000300
 #define PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8705	    0x00000400
 #define PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8706	    0x00000500
-#define PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8276	    0x00000600
+#define PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8726	    0x00000600
 #define PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8481	    0x00000700
 #define PORT_HW_CFG_XGXS_EXT_PHY_TYPE_SFX7101	    0x00000800
 #define PORT_HW_CFG_XGXS_EXT_PHY_TYPE_FAILURE	    0x0000fd00
@@ -299,6 +299,12 @@ struct shared_feat_cfg {				 /* NVRAM Offset */
 
 	u32 config;						/* 0x450 */
 #define SHARED_FEATURE_BMC_ECHO_MODE_EN 	    0x00000001
+
+	/*  Use the values from options 47 and 48 instead of the HW default
+	  values */
+#define SHARED_FEAT_CFG_OVERRIDE_PREEMPHASIS_CFG_DISABLED     0x00000000
+#define SHARED_FEAT_CFG_OVERRIDE_PREEMPHASIS_CFG_ENABLED      0x00000002
+
 #define SHARED_FEATURE_MF_MODE_DISABLED 	    0x00000100
 
 };
@@ -352,6 +358,11 @@ struct port_feat_cfg {			    /* port 0: 0x454  port 1: 0x4c8 */
 #define PORT_FEATURE_MBA_ENABLED		    0x02000000
 #define PORT_FEATURE_MFW_ENABLED		    0x04000000
 
+	/*  Check the optic vendor via i2c before allowing it to be used by
+	  SW */
+#define PORT_FEAT_CFG_OPT_MDL_ENFRCMNT_DISABLED 	      0x00000000
+#define PORT_FEAT_CFG_OPT_MDL_ENFRCMNT_ENABLED		      0x08000000
+
 	u32 wol_config;
 	/* Default is used when driver sets to "auto" mode */
 #define PORT_FEATURE_WOL_DEFAULT_MASK		    0x00000003

drivers/net/bnx2x_link.h

@@ -89,6 +89,9 @@ struct link_params {
 
 	/* phy_addr populated by the CLC */
 	u8 phy_addr;
+	u32 feature_config_flags;
+#define FEATURE_CONFIG_OVERRIDE_PREEMPHASIS_ENABLED (1<<0)
+#define FEATURE_CONFIG_MODULE_ENFORCMENT_ENABLED	(2<<0)
 	/* Device pointer passed to all callback functions */
 	struct bnx2x *bp;
 };
@@ -125,8 +128,11 @@ struct link_vars {
 /* Initialize the phy */
 u8 bnx2x_phy_init(struct link_params *input, struct link_vars *output);
 
-/* Reset the link. Should be called when driver or interface goes down */
-u8 bnx2x_link_reset(struct link_params *params, struct link_vars *vars);
+/* Reset the link. Should be called when driver or interface goes down
+   Before calling phy firmware upgrade, the reset_ext_phy should be set
+   to 0 */
+u8 bnx2x_link_reset(struct link_params *params, struct link_vars *vars,
+		  u8 reset_ext_phy);
 
 /* bnx2x_link_update should be called upon link interrupt */
 u8 bnx2x_link_update(struct link_params *input, struct link_vars *output);
@@ -163,6 +169,10 @@ u8 bnx2x_override_led_value(struct bnx2x *bp, u8 port, u32 led_idx, u32 value);
 
 u8 bnx2x_flash_download(struct bnx2x *bp, u8 port, u32 ext_phy_config,
 		      u8 driver_loaded, char data[], u32 size);
+/* bnx2x_handle_module_detect_int should be called upon module detection
+   interrupt */
+void bnx2x_handle_module_detect_int(struct link_params *params);
+
 /* Get the actual link status. In case it returns 0, link is up,
 	otherwise link is down*/
 u8 bnx2x_test_link(struct link_params *input, struct link_vars *vars);

drivers/net/bnx2x_main.c

@@ -2112,7 +2112,7 @@ static void bnx2x__link_reset(struct bnx2x *bp)
 {
 	if (!BP_NOMCP(bp)) {
 		bnx2x_acquire_phy_lock(bp);
-		bnx2x_link_reset(&bp->link_params, &bp->link_vars);
+		bnx2x_link_reset(&bp->link_params, &bp->link_vars, 1);
 		bnx2x_release_phy_lock(bp);
 	} else
 		BNX2X_ERR("Bootcode is missing -not resetting link\n");
@@ -2613,6 +2613,13 @@ static inline void bnx2x_attn_int_deasserted0(struct bnx2x *bp, u32 attn)
 		}
 	}
 
+	if (attn & (AEU_INPUTS_ATTN_BITS_GPIO3_FUNCTION_0 |
+		    AEU_INPUTS_ATTN_BITS_GPIO3_FUNCTION_1)) {
+		bnx2x_acquire_phy_lock(bp);
+		bnx2x_handle_module_detect_int(&bp->link_params);
+		bnx2x_release_phy_lock(bp);
+	}
+
 	if (attn & HW_INTERRUT_ASSERT_SET_0) {
 
 		val = REG_RD(bp, reg_offset);
@@ -5905,6 +5912,37 @@ static int bnx2x_init_port(struct bnx2x *bp)
 	/* Port DMAE comes here */
 
 	switch (XGXS_EXT_PHY_TYPE(bp->link_params.ext_phy_config)) {
+	case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8726:
+		{
+		u32 swap_val, swap_override, aeu_gpio_mask, offset;
+
+		bnx2x_set_gpio(bp, MISC_REGISTERS_GPIO_3,
+			       MISC_REGISTERS_GPIO_INPUT_HI_Z, port);
+
+		/* The GPIO should be swapped if the swap register is
+		   set and active */
+		swap_val = REG_RD(bp, NIG_REG_PORT_SWAP);
+		swap_override = REG_RD(bp, NIG_REG_STRAP_OVERRIDE);
+
+		/* Select function upon port-swap configuration */
+		if (port == 0) {
+			offset = MISC_REG_AEU_ENABLE1_FUNC_0_OUT_0;
+			aeu_gpio_mask = (swap_val && swap_override) ?
+				AEU_INPUTS_ATTN_BITS_GPIO3_FUNCTION_1 :
+				AEU_INPUTS_ATTN_BITS_GPIO3_FUNCTION_0;
+		} else {
+			offset = MISC_REG_AEU_ENABLE1_FUNC_1_OUT_0;
+			aeu_gpio_mask = (swap_val && swap_override) ?
+				AEU_INPUTS_ATTN_BITS_GPIO3_FUNCTION_0 :
+				AEU_INPUTS_ATTN_BITS_GPIO3_FUNCTION_1;
+		}
+		val = REG_RD(bp, offset);
+		/* add GPIO3 to group */
+		val |= aeu_gpio_mask;
+		REG_WR(bp, offset, val);
+		}
+		break;
+
 	case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_SFX7101:
 		/* add SPIO 5 to group 0 */
 		val = REG_RD(bp, MISC_REG_AEU_ENABLE1_FUNC_0_OUT_0);
@@ -7623,48 +7661,60 @@ static void __devinit bnx2x_link_settings_supported(struct bnx2x *bp,
 					       SUPPORTED_Asym_Pause);
 			break;
 
-		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8705:
-			BNX2X_DEV_INFO("ext_phy_type 0x%x (8705)\n",
+		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8072:
+			BNX2X_DEV_INFO("ext_phy_type 0x%x (8072)\n",
 				       ext_phy_type);
 
 			bp->port.supported |= (SUPPORTED_10000baseT_Full |
+					       SUPPORTED_1000baseT_Full |
 					       SUPPORTED_FIBRE |
+					       SUPPORTED_Autoneg |
 					       SUPPORTED_Pause |
 					       SUPPORTED_Asym_Pause);
 			break;
 
-		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8706:
-			BNX2X_DEV_INFO("ext_phy_type 0x%x (8706)\n",
+		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8073:
+			BNX2X_DEV_INFO("ext_phy_type 0x%x (8073)\n",
 				       ext_phy_type);
 
 			bp->port.supported |= (SUPPORTED_10000baseT_Full |
+					       SUPPORTED_2500baseX_Full |
 					       SUPPORTED_1000baseT_Full |
+					       SUPPORTED_FIBRE |
+					       SUPPORTED_Autoneg |
+					       SUPPORTED_Pause |
+					       SUPPORTED_Asym_Pause);
+			break;
+
+		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8705:
+			BNX2X_DEV_INFO("ext_phy_type 0x%x (8705)\n",
+				       ext_phy_type);
+
+			bp->port.supported |= (SUPPORTED_10000baseT_Full |
 					       SUPPORTED_FIBRE |
 					       SUPPORTED_Pause |
 					       SUPPORTED_Asym_Pause);
 			break;
 
-		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8072:
-			BNX2X_DEV_INFO("ext_phy_type 0x%x (8072)\n",
+		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8706:
+			BNX2X_DEV_INFO("ext_phy_type 0x%x (8706)\n",
 				       ext_phy_type);
 
 			bp->port.supported |= (SUPPORTED_10000baseT_Full |
 					       SUPPORTED_1000baseT_Full |
 					       SUPPORTED_FIBRE |
-					       SUPPORTED_Autoneg |
 					       SUPPORTED_Pause |
 					       SUPPORTED_Asym_Pause);
 			break;
 
-		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8073:
-			BNX2X_DEV_INFO("ext_phy_type 0x%x (8073)\n",
+		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8726:
+			BNX2X_DEV_INFO("ext_phy_type 0x%x (8726)\n",
 				       ext_phy_type);
 
 			bp->port.supported |= (SUPPORTED_10000baseT_Full |
-					       SUPPORTED_2500baseX_Full |
 					       SUPPORTED_1000baseT_Full |
-					       SUPPORTED_FIBRE |
 					       SUPPORTED_Autoneg |
+					       SUPPORTED_FIBRE |
 					       SUPPORTED_Pause |
 					       SUPPORTED_Asym_Pause);
 			break;
@@ -7905,6 +7955,7 @@ static void __devinit bnx2x_get_port_hwinfo(struct bnx2x *bp)
 {
 	int port = BP_PORT(bp);
 	u32 val, val2;
+	u32 config;
 
 	bp->link_params.bp = bp;
 	bp->link_params.port = port;
@@ -7923,6 +7974,14 @@ static void __devinit bnx2x_get_port_hwinfo(struct bnx2x *bp)
 	bp->port.link_config =
 		SHMEM_RD(bp, dev_info.port_feature_config[port].link_config);
 
+	config = SHMEM_RD(bp, dev_info.port_feature_config[port].config);
+	if (config & PORT_FEAT_CFG_OPT_MDL_ENFRCMNT_ENABLED)
+		bp->link_params.feature_config_flags |=
+				FEATURE_CONFIG_MODULE_ENFORCMENT_ENABLED;
+	else
+		bp->link_params.feature_config_flags &=
+				~FEATURE_CONFIG_MODULE_ENFORCMENT_ENABLED;
+
 	BNX2X_DEV_INFO("serdes_config 0x%08x  lane_config 0x%08x\n"
 	     KERN_INFO "  ext_phy_config 0x%08x  speed_cap_mask 0x%08x"
 		       "  link_config 0x%08x\n",
@@ -8121,10 +8180,11 @@ static int bnx2x_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 
 		switch (ext_phy_type) {
 		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_DIRECT:
-		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8705:
-		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8706:
 		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8072:
 		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8073:
+		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8705:
+		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8706:
+		case PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8726:
 			cmd->port = PORT_FIBRE;
 			break;
 
@@ -8807,7 +8867,7 @@ static int bnx2x_set_eeprom(struct net_device *dev,
 			if ((bp->state == BNX2X_STATE_OPEN) ||
 			    (bp->state == BNX2X_STATE_DISABLED)) {
 				rc |= bnx2x_link_reset(&bp->link_params,
-						       &bp->link_vars);
+						       &bp->link_vars, 1);
 				rc |= bnx2x_phy_init(&bp->link_params,
 						     &bp->link_vars);
 			}

drivers/net/bnx2x_reg.h

@@ -5800,9 +5800,25 @@ Theotherbitsarereservedandshouldbezero*/
 #define MDIO_PMA_REG_ROM_VER2		0xca1a
 #define MDIO_PMA_REG_EDC_FFE_MAIN	0xca1b
 #define MDIO_PMA_REG_PLL_BANDWIDTH	0xca1d
+#define MDIO_PMA_REG_MISC_CTRL0 	0xca23
+#define MDIO_PMA_REG_LRM_MODE		0xca3f
 #define MDIO_PMA_REG_CDR_BANDWIDTH	0xca46
 #define MDIO_PMA_REG_MISC_CTRL1 	0xca85
 
+#define MDIO_PMA_REG_8726_TWO_WIRE_CTRL 	0x8000
+#define MDIO_PMA_REG_8726_TWO_WIRE_CTRL_STATUS_MASK	0x000c
+#define MDIO_PMA_REG_8726_TWO_WIRE_STATUS_IDLE		0x0000
+#define MDIO_PMA_REG_8726_TWO_WIRE_STATUS_COMPLETE	0x0004
+#define MDIO_PMA_REG_8726_TWO_WIRE_STATUS_IN_PROGRESS	0x0008
+#define MDIO_PMA_REG_8726_TWO_WIRE_STATUS_FAILED	0x000c
+#define MDIO_PMA_REG_8726_TWO_WIRE_BYTE_CNT	0x8002
+#define MDIO_PMA_REG_8726_TWO_WIRE_MEM_ADDR	0x8003
+#define MDIO_PMA_REG_8726_TWO_WIRE_DATA_BUF	0xc820
+#define MDIO_PMA_REG_8726_TWO_WIRE_DATA_MASK 0xff
+#define MDIO_PMA_REG_8726_TX_CTRL1		0xca01
+#define MDIO_PMA_REG_8726_TX_CTRL2		0xca05
+
+
 #define MDIO_PMA_REG_7101_RESET 	0xc000
 #define MDIO_PMA_REG_7107_LED_CNTL	0xc007
 #define MDIO_PMA_REG_7101_VER1		0xc026
@@ -5832,6 +5848,12 @@ Theotherbitsarereservedandshouldbezero*/
 #define MDIO_XS_PLL_SEQUENCER		0x8000
 #define MDIO_XS_SFX7101_XGXS_TEST1	0xc00a
 
+#define MDIO_XS_8706_REG_BANK_RX0	0x80bc
+#define MDIO_XS_8706_REG_BANK_RX1	0x80cc
+#define MDIO_XS_8706_REG_BANK_RX2	0x80dc
+#define MDIO_XS_8706_REG_BANK_RX3	0x80ec
+#define MDIO_XS_8706_REG_BANK_RXA	0x80fc
+
 #define MDIO_AN_DEVAD			0x7
 /*ieee*/
 #define MDIO_AN_REG_CTRL		0x0000