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1// SPDX-License-Identifier: GPL-2.02/* Copyright Sunplus Technology Co., Ltd.3 *       All rights reserved.4 */5 6#include <linux/platform_device.h>7#include <linux/netdevice.h>8#include <linux/bitfield.h>9#include <linux/of_mdio.h>10 11#include "spl2sw_register.h"12#include "spl2sw_define.h"13#include "spl2sw_desc.h"14#include "spl2sw_mac.h"15 16void spl2sw_mac_hw_stop(struct spl2sw_common *comm)17{18	u32 reg;19 20	if (comm->enable == 0) {21		/* Mask and clear all interrupts. */22		writel(0xffffffff, comm->l2sw_reg_base + L2SW_SW_INT_MASK_0);23		writel(0xffffffff, comm->l2sw_reg_base + L2SW_SW_INT_STATUS_0);24 25		/* Disable cpu 0 and cpu 1. */26		reg = readl(comm->l2sw_reg_base + L2SW_CPU_CNTL);27		reg |= MAC_DIS_SOC1_CPU | MAC_DIS_SOC0_CPU;28		writel(reg, comm->l2sw_reg_base + L2SW_CPU_CNTL);29	}30 31	/* Disable LAN ports. */32	reg = readl(comm->l2sw_reg_base + L2SW_PORT_CNTL0);33	reg |= FIELD_PREP(MAC_DIS_PORT, ~comm->enable);34	writel(reg, comm->l2sw_reg_base + L2SW_PORT_CNTL0);35}36 37void spl2sw_mac_hw_start(struct spl2sw_common *comm)38{39	u32 reg;40 41	/* Enable cpu port 0 (6) & CRC padding (8) */42	reg = readl(comm->l2sw_reg_base + L2SW_CPU_CNTL);43	reg &= ~MAC_DIS_SOC0_CPU;44	reg |= MAC_EN_CRC_SOC0;45	writel(reg, comm->l2sw_reg_base + L2SW_CPU_CNTL);46 47	/* Enable port 0 & port 1 */48	reg = readl(comm->l2sw_reg_base + L2SW_PORT_CNTL0);49	reg &= FIELD_PREP(MAC_DIS_PORT, ~comm->enable) | ~MAC_DIS_PORT;50	writel(reg, comm->l2sw_reg_base + L2SW_PORT_CNTL0);51}52 53int spl2sw_mac_addr_add(struct spl2sw_mac *mac)54{55	struct spl2sw_common *comm = mac->comm;56	u32 reg;57	int ret;58 59	/* Write 6-octet MAC address. */60	writel((mac->mac_addr[0] << 0) + (mac->mac_addr[1] << 8),61	       comm->l2sw_reg_base + L2SW_W_MAC_15_0);62	writel((mac->mac_addr[2] << 0) + (mac->mac_addr[3] << 8) +63	       (mac->mac_addr[4] << 16) + (mac->mac_addr[5] << 24),64	       comm->l2sw_reg_base + L2SW_W_MAC_47_16);65 66	/* Set learn port = cpu_port, aging = 1 */67	reg = MAC_W_CPU_PORT_0 | FIELD_PREP(MAC_W_VID, mac->vlan_id) |68	      FIELD_PREP(MAC_W_AGE, 1) | MAC_W_MAC_CMD;69	writel(reg, comm->l2sw_reg_base + L2SW_WT_MAC_AD0);70 71	/* Wait for completing. */72	ret = read_poll_timeout(readl, reg, reg & MAC_W_MAC_DONE, 1, 200, true,73				comm->l2sw_reg_base + L2SW_WT_MAC_AD0);74	if (ret) {75		netdev_err(mac->ndev, "Failed to add address to table!\n");76		return ret;77	}78 79	netdev_dbg(mac->ndev, "mac_ad0 = %08x, mac_ad = %08x%04x\n",80		   readl(comm->l2sw_reg_base + L2SW_WT_MAC_AD0),81		   (u32)FIELD_GET(MAC_W_MAC_47_16,82		   readl(comm->l2sw_reg_base + L2SW_W_MAC_47_16)),83		   (u32)FIELD_GET(MAC_W_MAC_15_0,84		   readl(comm->l2sw_reg_base + L2SW_W_MAC_15_0)));85	return 0;86}87 88int spl2sw_mac_addr_del(struct spl2sw_mac *mac)89{90	struct spl2sw_common *comm = mac->comm;91	u32 reg;92	int ret;93 94	/* Write 6-octet MAC address. */95	writel((mac->mac_addr[0] << 0) + (mac->mac_addr[1] << 8),96	       comm->l2sw_reg_base + L2SW_W_MAC_15_0);97	writel((mac->mac_addr[2] << 0) + (mac->mac_addr[3] << 8) +98	       (mac->mac_addr[4] << 16) + (mac->mac_addr[5] << 24),99	       comm->l2sw_reg_base + L2SW_W_MAC_47_16);100 101	/* Set learn port = lan_port0 and aging = 0102	 * to wipe (age) out the entry.103	 */104	reg = MAC_W_LAN_PORT_0 | FIELD_PREP(MAC_W_VID, mac->vlan_id) | MAC_W_MAC_CMD;105	writel(reg, comm->l2sw_reg_base + L2SW_WT_MAC_AD0);106 107	/* Wait for completing. */108	ret = read_poll_timeout(readl, reg, reg & MAC_W_MAC_DONE, 1, 200, true,109				comm->l2sw_reg_base + L2SW_WT_MAC_AD0);110	if (ret) {111		netdev_err(mac->ndev, "Failed to delete address from table!\n");112		return ret;113	}114 115	netdev_dbg(mac->ndev, "mac_ad0 = %08x, mac_ad = %08x%04x\n",116		   readl(comm->l2sw_reg_base + L2SW_WT_MAC_AD0),117		   (u32)FIELD_GET(MAC_W_MAC_47_16,118		   readl(comm->l2sw_reg_base + L2SW_W_MAC_47_16)),119		   (u32)FIELD_GET(MAC_W_MAC_15_0,120		   readl(comm->l2sw_reg_base + L2SW_W_MAC_15_0)));121	return 0;122}123 124void spl2sw_mac_hw_init(struct spl2sw_common *comm)125{126	u32 reg;127 128	/* Disable cpu0 and cpu 1 port. */129	reg = readl(comm->l2sw_reg_base + L2SW_CPU_CNTL);130	reg |= MAC_DIS_SOC1_CPU | MAC_DIS_SOC0_CPU;131	writel(reg, comm->l2sw_reg_base + L2SW_CPU_CNTL);132 133	/* Set base addresses of TX and RX queues. */134	writel(comm->desc_dma, comm->l2sw_reg_base + L2SW_TX_LBASE_ADDR_0);135	writel(comm->desc_dma + sizeof(struct spl2sw_mac_desc) * TX_DESC_NUM,136	       comm->l2sw_reg_base + L2SW_TX_HBASE_ADDR_0);137	writel(comm->desc_dma + sizeof(struct spl2sw_mac_desc) * (TX_DESC_NUM +138	       MAC_GUARD_DESC_NUM), comm->l2sw_reg_base + L2SW_RX_HBASE_ADDR_0);139	writel(comm->desc_dma + sizeof(struct spl2sw_mac_desc) * (TX_DESC_NUM +140	       MAC_GUARD_DESC_NUM + RX_QUEUE0_DESC_NUM),141	       comm->l2sw_reg_base + L2SW_RX_LBASE_ADDR_0);142 143	/* Fc_rls_th=0x4a, Fc_set_th=0x3a, Drop_rls_th=0x2d, Drop_set_th=0x1d */144	writel(0x4a3a2d1d, comm->l2sw_reg_base + L2SW_FL_CNTL_TH);145 146	/* Cpu_rls_th=0x4a, Cpu_set_th=0x3a, Cpu_th=0x12, Port_th=0x12 */147	writel(0x4a3a1212, comm->l2sw_reg_base + L2SW_CPU_FL_CNTL_TH);148 149	/* mtcc_lmt=0xf, Pri_th_l=6, Pri_th_h=6, weigh_8x_en=1 */150	writel(0xf6680000, comm->l2sw_reg_base + L2SW_PRI_FL_CNTL);151 152	/* High-active LED */153	reg = readl(comm->l2sw_reg_base + L2SW_LED_PORT0);154	reg |= MAC_LED_ACT_HI;155	writel(reg, comm->l2sw_reg_base + L2SW_LED_PORT0);156 157	/* Disable aging of cpu port 0 & 1.158	 * Disable SA learning of cpu port 0 & 1.159	 * Enable UC and MC packets160	 */161	reg = readl(comm->l2sw_reg_base + L2SW_CPU_CNTL);162	reg &= ~(MAC_EN_SOC1_AGING | MAC_EN_SOC0_AGING |163		 MAC_DIS_BC2CPU_P1 | MAC_DIS_BC2CPU_P0 |164		 MAC_DIS_MC2CPU_P1 | MAC_DIS_MC2CPU_P0);165	reg |= MAC_DIS_LRN_SOC1 | MAC_DIS_LRN_SOC0;166	writel(reg, comm->l2sw_reg_base + L2SW_CPU_CNTL);167 168	/* Enable RMC2CPU for port 0 & 1169	 * Enable Flow control for port 0 & 1170	 * Enable Back pressure for port 0 & 1171	 */172	reg = readl(comm->l2sw_reg_base + L2SW_PORT_CNTL0);173	reg &= ~(MAC_DIS_RMC2CPU_P1 | MAC_DIS_RMC2CPU_P0);174	reg |= MAC_EN_FLOW_CTL_P1 | MAC_EN_FLOW_CTL_P0 |175	       MAC_EN_BACK_PRESS_P1 | MAC_EN_BACK_PRESS_P0;176	writel(reg, comm->l2sw_reg_base + L2SW_PORT_CNTL0);177 178	/* Disable LAN port SA learning. */179	reg = readl(comm->l2sw_reg_base + L2SW_PORT_CNTL1);180	reg |= MAC_DIS_SA_LRN_P1 | MAC_DIS_SA_LRN_P0;181	writel(reg, comm->l2sw_reg_base + L2SW_PORT_CNTL1);182 183	/* Enable rmii force mode and184	 * set both external phy-address to 31.185	 */186	reg = readl(comm->l2sw_reg_base + L2SW_MAC_FORCE_MODE);187	reg &= ~(MAC_EXT_PHY1_ADDR | MAC_EXT_PHY0_ADDR);188	reg |= FIELD_PREP(MAC_EXT_PHY1_ADDR, 31) | FIELD_PREP(MAC_EXT_PHY0_ADDR, 31);189	reg |= MAC_FORCE_RMII_EN_1 | MAC_FORCE_RMII_EN_0;190	writel(reg, comm->l2sw_reg_base + L2SW_MAC_FORCE_MODE);191 192	/* Port 0: VLAN group 0193	 * Port 1: VLAN group 1194	 */195	reg = FIELD_PREP(MAC_P1_PVID, 1) | FIELD_PREP(MAC_P0_PVID, 0);196	writel(reg, comm->l2sw_reg_base + L2SW_PVID_CONFIG0);197 198	/* VLAN group 0: cpu0 (bit3) + port0 (bit0) = 1001 = 0x9199	 * VLAN group 1: cpu0 (bit3) + port1 (bit1) = 1010 = 0xa200	 */201	reg = FIELD_PREP(MAC_VLAN_MEMSET_1, 0xa) | FIELD_PREP(MAC_VLAN_MEMSET_0, 9);202	writel(reg, comm->l2sw_reg_base + L2SW_VLAN_MEMSET_CONFIG0);203 204	/* RMC forward: to_cpu (1)205	 * LED: 60mS (1)206	 * BC storm prev: 31 BC (1)207	 */208	reg = readl(comm->l2sw_reg_base + L2SW_SW_GLB_CNTL);209	reg &= ~(MAC_RMC_TB_FAULT_RULE | MAC_LED_FLASH_TIME | MAC_BC_STORM_PREV);210	reg |= FIELD_PREP(MAC_RMC_TB_FAULT_RULE, 1) |211	       FIELD_PREP(MAC_LED_FLASH_TIME, 1) |212	       FIELD_PREP(MAC_BC_STORM_PREV, 1);213	writel(reg, comm->l2sw_reg_base + L2SW_SW_GLB_CNTL);214 215	writel(MAC_INT_MASK_DEF, comm->l2sw_reg_base + L2SW_SW_INT_MASK_0);216}217 218void spl2sw_mac_rx_mode_set(struct spl2sw_mac *mac)219{220	struct spl2sw_common *comm = mac->comm;221	struct net_device *ndev = mac->ndev;222	u32 mask, reg, rx_mode;223 224	netdev_dbg(ndev, "ndev->flags = %08x\n", ndev->flags);225	mask = FIELD_PREP(MAC_DIS_MC2CPU, mac->lan_port) |226	       FIELD_PREP(MAC_DIS_UN2CPU, mac->lan_port);227	reg = readl(comm->l2sw_reg_base + L2SW_CPU_CNTL);228 229	if (ndev->flags & IFF_PROMISC) {230		/* Allow MC and unknown UC packets */231		rx_mode = FIELD_PREP(MAC_DIS_MC2CPU, mac->lan_port) |232			  FIELD_PREP(MAC_DIS_UN2CPU, mac->lan_port);233	} else if ((!netdev_mc_empty(ndev) && (ndev->flags & IFF_MULTICAST)) ||234		   (ndev->flags & IFF_ALLMULTI)) {235		/* Allow MC packets */236		rx_mode = FIELD_PREP(MAC_DIS_MC2CPU, mac->lan_port);237	} else {238		/* Disable MC and unknown UC packets */239		rx_mode = 0;240	}241 242	writel((reg & (~mask)) | ((~rx_mode) & mask), comm->l2sw_reg_base + L2SW_CPU_CNTL);243	netdev_dbg(ndev, "cpu_cntl = %08x\n", readl(comm->l2sw_reg_base + L2SW_CPU_CNTL));244}245 246void spl2sw_mac_init(struct spl2sw_common *comm)247{248	u32 i;249 250	for (i = 0; i < RX_DESC_QUEUE_NUM; i++)251		comm->rx_pos[i] = 0;252	mb();	/* make sure settings are effective. */253 254	spl2sw_mac_hw_init(comm);255}256 257void spl2sw_mac_soft_reset(struct spl2sw_common *comm)258{259	u32 i;260 261	spl2sw_mac_hw_stop(comm);262 263	spl2sw_rx_descs_flush(comm);264	comm->tx_pos = 0;265	comm->tx_done_pos = 0;266	comm->tx_desc_full = 0;267 268	for (i = 0; i < RX_DESC_QUEUE_NUM; i++)269		comm->rx_pos[i] = 0;270	mb();	/* make sure settings are effective. */271 272	spl2sw_mac_hw_init(comm);273	spl2sw_mac_hw_start(comm);274}275