// SPDX-License-Identifier: GPL-2.0-only

#include <asm/mach-rtl838x/mach-rtl83xx.h>
#include "rtl83xx.h"

extern struct mutex smi_lock;


static inline void rtl838x_mask_port_reg(u64 clear, u64 set, int reg)
{
	sw_w32_mask((u32)clear, (u32)set, reg);
}

static inline void rtl838x_set_port_reg(u64 set, int reg)
{
	sw_w32(set, reg);
}

static inline u64 rtl838x_get_port_reg(int reg)
{
	return ((u64) sw_r32(reg));
}

static inline int rtl838x_stat_port_std_mib(int p)
{
	return RTL838X_STAT_PORT_STD_MIB + (p << 8);
}

static inline int rtl838x_port_iso_ctrl(int p)
{
	return RTL838X_PORT_ISO_CTRL(p);
}

static inline void rtl838x_exec_tbl0_cmd(u32 cmd)
{
	sw_w32(cmd, RTL838X_TBL_ACCESS_CTRL_0);
	do { } while (sw_r32(RTL838X_TBL_ACCESS_CTRL_0) & BIT(15));
}

static inline void rtl838x_exec_tbl1_cmd(u32 cmd)
{
	sw_w32(cmd, RTL838X_TBL_ACCESS_CTRL_1);
	do { } while (sw_r32(RTL838X_TBL_ACCESS_CTRL_1) & BIT(15));
}

static inline int rtl838x_tbl_access_data_0(int i)
{
	return RTL838X_TBL_ACCESS_DATA_0(i);
}

static void rtl838x_vlan_tables_read(u32 vlan, struct rtl838x_vlan_info *info)
{
	u32 cmd, v;

	cmd = BIT(15) /* Execute cmd */
		| BIT(14) /* Read */
		| 0 << 12 /* Table type 0b00 */
		| (vlan & 0xfff);
	rtl838x_exec_tbl0_cmd(cmd);
	info->tagged_ports = sw_r32(RTL838X_TBL_ACCESS_DATA_0(0));
	v = sw_r32(RTL838X_TBL_ACCESS_DATA_0(1));
	info->profile_id = v & 0x7;
	info->hash_mc_fid = !!(v & 0x8);
	info->hash_uc_fid = !!(v & 0x10);
	info->fid = (v >> 5) & 0x3f;


	cmd = BIT(15) /* Execute cmd */
		| BIT(14) /* Read */
		| 0 << 12 /* Table type 0b00 */
		| (vlan & 0xfff);
	rtl838x_exec_tbl1_cmd(cmd);
	info->untagged_ports = sw_r32(RTL838X_TBL_ACCESS_DATA_1(0));
}

static void rtl838x_vlan_set_tagged(u32 vlan, struct rtl838x_vlan_info *info)
{
	u32 cmd = BIT(15) /* Execute cmd */
		| 0 << 14 /* Write */
		| 0 << 12 /* Table type 0b00 */
		| (vlan & 0xfff);
	u32 v;

	sw_w32(info->tagged_ports, RTL838X_TBL_ACCESS_DATA_0(0));

	v = info->profile_id;
	v |= info->hash_mc_fid ? 0x8 : 0;
	v |= info->hash_uc_fid ? 0x10 : 0;
	v |= ((u32)info->fid) << 5;

	sw_w32(v, RTL838X_TBL_ACCESS_DATA_0(1));
	rtl838x_exec_tbl0_cmd(cmd);
}

static void rtl838x_vlan_set_untagged(u32 vlan, u64 portmask)
{
	u32 cmd = BIT(15) /* Execute cmd */
		| 0 << 14 /* Write */
		| 0 << 12 /* Table type 0b00 */
		| (vlan & 0xfff);
	sw_w32(portmask & 0x1fffffff, RTL838X_TBL_ACCESS_DATA_1(0));
	rtl838x_exec_tbl1_cmd(cmd);
}

static inline int rtl838x_mac_force_mode_ctrl(int p)
{
	return RTL838X_MAC_FORCE_MODE_CTRL + (p << 2);
}

static inline int rtl838x_mac_port_ctrl(int p)
{
	return RTL838X_MAC_PORT_CTRL(p);
}

static inline int rtl838x_l2_port_new_salrn(int p)
{
	return RTL838X_L2_PORT_NEW_SALRN(p);
}

static inline int rtl838x_l2_port_new_sa_fwd(int p)
{
	return RTL838X_L2_PORT_NEW_SA_FWD(p);
}

static inline int rtl838x_mir_ctrl(int group)
{
	return RTL838X_MIR_CTRL(group);
}

static inline int rtl838x_mir_dpm(int group)
{
	return RTL838X_MIR_DPM_CTRL(group);
}

static inline int rtl838x_mir_spm(int group)
{
	return RTL838X_MIR_SPM_CTRL(group);
}

static inline int rtl838x_mac_link_spd_sts(int p)
{
	return RTL838X_MAC_LINK_SPD_STS(p);
}

static u64 rtl838x_read_l2_entry_using_hash(u32 hash, u32 position, struct rtl838x_l2_entry *e)
{
	u64 entry;
	u32 r[3];

	/* Search in SRAM, with hash and at position in hash bucket (0-3) */
	u32 idx = (0 << 14) | (hash << 2) | position;

	u32 cmd = BIT(16) /* Execute cmd */
		| BIT(15) /* Read */
		| 0 << 13 /* Table type 0b00 */
		| (idx & 0x1fff);

	sw_w32(cmd, RTL838X_TBL_ACCESS_L2_CTRL);
	do { }  while (sw_r32(RTL838X_TBL_ACCESS_L2_CTRL) & BIT(16));
	r[0] = sw_r32(RTL838X_TBL_ACCESS_L2_DATA(0));
	r[1] = sw_r32(RTL838X_TBL_ACCESS_L2_DATA(1));
	r[2] = sw_r32(RTL838X_TBL_ACCESS_L2_DATA(2));

	e->mac[0] = (r[1] >> 20);
	e->mac[1] = (r[1] >> 12);
	e->mac[2] = (r[1] >> 4);
	e->mac[3] = (r[1] & 0xf) << 4 | (r[2] >> 28);
	e->mac[4] = (r[2] >> 20);
	e->mac[5] = (r[2] >> 12);
	e->is_static = !!((r[0] >> 19) & 1);
	e->vid = r[0] & 0xfff;
	e->rvid = r[2] & 0xfff;
	e->port = (r[0] >> 12) & 0x1f;

	e->valid = true;
	if (!(r[0] >> 17)) /* Check for invalid entry */
		e->valid = false;

	if (e->valid)
		pr_debug("Found in Hash: R1 %x R2 %x R3 %x\n", r[0], r[1], r[2]);

	entry = (((u64) r[1]) << 32) | (r[2] & 0xfffff000) | (r[0] & 0xfff);
	return entry;
}

static u64 rtl838x_read_cam(int idx, struct rtl838x_l2_entry *e)
{
	u64 entry;
	u32 r[3];

	u32 cmd = BIT(16) /* Execute cmd */
		| BIT(15) /* Read */
		| BIT(13) /* Table type 0b01 */
		| (idx & 0x3f);
	sw_w32(cmd, RTL838X_TBL_ACCESS_L2_CTRL);
	do { }  while (sw_r32(RTL838X_TBL_ACCESS_L2_CTRL) & BIT(16));
	r[0] = sw_r32(RTL838X_TBL_ACCESS_L2_DATA(0));
	r[1] = sw_r32(RTL838X_TBL_ACCESS_L2_DATA(1));
	r[2] = sw_r32(RTL838X_TBL_ACCESS_L2_DATA(2));

	e->mac[0] = (r[1] >> 20);
	e->mac[1] = (r[1] >> 12);
	e->mac[2] = (r[1] >> 4);
	e->mac[3] = (r[1] & 0xf) << 4 | (r[2] >> 28);
	e->mac[4] = (r[2] >> 20);
	e->mac[5] = (r[2] >> 12);
	e->is_static = !!((r[0] >> 19) & 1);
	e->vid = r[0] & 0xfff;
	e->rvid = r[2] & 0xfff;
	e->port = (r[0] >> 12) & 0x1f;

	e->valid = true;
	if (!(r[0] >> 17)) /* Check for invalid entry */
		e->valid = false;

	if (e->valid)
		pr_debug("Found in CAM: R1 %x R2 %x R3 %x\n", r[0], r[1], r[2]);

	entry = (((u64) r[1]) << 32) | (r[2] & 0xfffff000) | (r[0] & 0xfff);
	return entry;
}

static inline int rtl838x_vlan_profile(int profile)
{
	return RTL838X_VLAN_PROFILE(profile);
}

static inline int rtl838x_vlan_port_egr_filter(int port)
{
	return RTL838X_VLAN_PORT_EGR_FLTR;
}

static inline int rtl838x_vlan_port_igr_filter(int port)
{
	return RTL838X_VLAN_PORT_IGR_FLTR(port);
}

static inline int rtl838x_vlan_port_pb(int port)
{
	return RTL838X_VLAN_PORT_PB_VLAN(port);
}

static inline int rtl838x_vlan_port_tag_sts_ctrl(int port)
{
	return RTL838X_VLAN_PORT_TAG_STS_CTRL(port);
}

const struct rtl838x_reg rtl838x_reg = {
	.mask_port_reg_be = rtl838x_mask_port_reg,
	.set_port_reg_be = rtl838x_set_port_reg,
	.get_port_reg_be = rtl838x_get_port_reg,
	.mask_port_reg_le = rtl838x_mask_port_reg,
	.set_port_reg_le = rtl838x_set_port_reg,
	.get_port_reg_le = rtl838x_get_port_reg,
	.stat_port_rst = RTL838X_STAT_PORT_RST,
	.stat_rst = RTL838X_STAT_RST,
	.stat_port_std_mib = rtl838x_stat_port_std_mib,
	.port_iso_ctrl = rtl838x_port_iso_ctrl,
	.l2_ctrl_0 = RTL838X_L2_CTRL_0,
	.l2_ctrl_1 = RTL838X_L2_CTRL_1,
	.l2_port_aging_out = RTL838X_L2_PORT_AGING_OUT,
	.smi_poll_ctrl = RTL838X_SMI_POLL_CTRL,
	.l2_tbl_flush_ctrl = RTL838X_L2_TBL_FLUSH_CTRL,
	.exec_tbl0_cmd = rtl838x_exec_tbl0_cmd,
	.exec_tbl1_cmd = rtl838x_exec_tbl1_cmd,
	.tbl_access_data_0 = rtl838x_tbl_access_data_0,
	.isr_glb_src = RTL838X_ISR_GLB_SRC,
	.isr_port_link_sts_chg = RTL838X_ISR_PORT_LINK_STS_CHG,
	.imr_port_link_sts_chg = RTL838X_IMR_PORT_LINK_STS_CHG,
	.imr_glb = RTL838X_IMR_GLB,
	.vlan_tables_read = rtl838x_vlan_tables_read,
	.vlan_set_tagged = rtl838x_vlan_set_tagged,
	.vlan_set_untagged = rtl838x_vlan_set_untagged,
	.mac_force_mode_ctrl = rtl838x_mac_force_mode_ctrl,
	.mac_port_ctrl = rtl838x_mac_port_ctrl,
	.l2_port_new_salrn = rtl838x_l2_port_new_salrn,
	.l2_port_new_sa_fwd = rtl838x_l2_port_new_sa_fwd,
	.mir_ctrl = rtl838x_mir_ctrl,
	.mir_dpm = rtl838x_mir_dpm,
	.mir_spm = rtl838x_mir_spm,
	.mac_link_sts = RTL838X_MAC_LINK_STS,
	.mac_link_dup_sts = RTL838X_MAC_LINK_DUP_STS,
	.mac_link_spd_sts = rtl838x_mac_link_spd_sts,
	.mac_rx_pause_sts = RTL838X_MAC_RX_PAUSE_STS,
	.mac_tx_pause_sts = RTL838X_MAC_TX_PAUSE_STS,
	.read_l2_entry_using_hash = rtl838x_read_l2_entry_using_hash,
	.read_cam = rtl838x_read_cam,
	.vlan_profile = rtl838x_vlan_profile,
	.vlan_port_egr_filter = rtl838x_vlan_port_egr_filter,
	.vlan_port_igr_filter = rtl838x_vlan_port_igr_filter,
	.vlan_port_pb = rtl838x_vlan_port_pb,
	.vlan_port_tag_sts_ctrl = rtl838x_vlan_port_tag_sts_ctrl,
};

irqreturn_t rtl838x_switch_irq(int irq, void *dev_id)
{
	struct dsa_switch *ds = dev_id;
	u32 status = sw_r32(RTL838X_ISR_GLB_SRC);
	u32 ports = sw_r32(RTL838X_ISR_PORT_LINK_STS_CHG);
	u32 link;
	int i;

	/* Clear status */
	sw_w32(ports, RTL838X_ISR_PORT_LINK_STS_CHG);
	pr_debug("RTL8380 Link change: status: %x, ports %x\n", status, ports);

	for (i = 0; i < 28; i++) {
		if (ports & BIT(i)) {
			link = sw_r32(RTL838X_MAC_LINK_STS);
			if (link & BIT(i))
				dsa_port_phylink_mac_change(ds, i, true);
			else
				dsa_port_phylink_mac_change(ds, i, false);
		}
	}
	return IRQ_HANDLED;
}

int rtl838x_smi_wait_op(int timeout)
{
	do {
		timeout--;
		udelay(10);
	} while ((sw_r32(RTL838X_SMI_ACCESS_PHY_CTRL_1) & 0x1) && (timeout >= 0));
	if (timeout <= 0)
		return -1;
	return 0;
}

/*
 * Reads a register in a page from the PHY
 */
int rtl838x_read_phy(u32 port, u32 page, u32 reg, u32 *val)
{
	u32 v;
	u32 park_page;

	if (port > 31) {
		*val = 0xffff;
		return 0;
	}

	if (page > 4095 || reg > 31)
		return -ENOTSUPP;

	mutex_lock(&smi_lock);

	if (rtl838x_smi_wait_op(10000))
		goto timeout;

	sw_w32_mask(0xffff0000, port << 16, RTL838X_SMI_ACCESS_PHY_CTRL_2);

	park_page = sw_r32(RTL838X_SMI_ACCESS_PHY_CTRL_1) & ((0x1f << 15) | 0x2);
	v = reg << 20 | page << 3;
	sw_w32(v | park_page, RTL838X_SMI_ACCESS_PHY_CTRL_1);
	sw_w32_mask(0, 1, RTL838X_SMI_ACCESS_PHY_CTRL_1);

	if (rtl838x_smi_wait_op(10000))
		goto timeout;

	*val = sw_r32(RTL838X_SMI_ACCESS_PHY_CTRL_2) & 0xffff;

	mutex_unlock(&smi_lock);
	return 0;

timeout:
	mutex_unlock(&smi_lock);
	return -ETIMEDOUT;
}

/*
 * Write to a register in a page of the PHY
 */
int rtl838x_write_phy(u32 port, u32 page, u32 reg, u32 val)
{
	u32 v;
	u32 park_page;

	val &= 0xffff;
	if (port > 31 || page > 4095 || reg > 31)
		return -ENOTSUPP;

	mutex_lock(&smi_lock);
	if (rtl838x_smi_wait_op(10000))
		goto timeout;

	sw_w32(BIT(port), RTL838X_SMI_ACCESS_PHY_CTRL_0);
	mdelay(10);

	sw_w32_mask(0xffff0000, val << 16, RTL838X_SMI_ACCESS_PHY_CTRL_2);

	park_page = sw_r32(RTL838X_SMI_ACCESS_PHY_CTRL_1) & ((0x1f << 15) | 0x2);
	v = reg << 20 | page << 3 | 0x4;
	sw_w32(v | park_page, RTL838X_SMI_ACCESS_PHY_CTRL_1);
	sw_w32_mask(0, 1, RTL838X_SMI_ACCESS_PHY_CTRL_1);

	if (rtl838x_smi_wait_op(10000))
		goto timeout;

	mutex_unlock(&smi_lock);
	return 0;

timeout:
	mutex_unlock(&smi_lock);
	return -ETIMEDOUT;
}

void rtl8380_get_version(struct rtl838x_switch_priv *priv)
{
	u32 rw_save, info_save;
	u32 info;

	rw_save = sw_r32(RTL838X_INT_RW_CTRL);
	sw_w32(rw_save | 0x3, RTL838X_INT_RW_CTRL);

	info_save = sw_r32(RTL838X_CHIP_INFO);
	sw_w32(info_save | 0xA0000000, RTL838X_CHIP_INFO);

	info = sw_r32(RTL838X_CHIP_INFO);
	sw_w32(info_save, RTL838X_CHIP_INFO);
	sw_w32(rw_save, RTL838X_INT_RW_CTRL);

	if ((info & 0xFFFF) == 0x6275) {
		if (((info >> 16) & 0x1F) == 0x1)
			priv->version = RTL8380_VERSION_A;
		else if (((info >> 16) & 0x1F) == 0x2)
			priv->version = RTL8380_VERSION_B;
		else
			priv->version = RTL8380_VERSION_B;
	} else {
		priv->version = '-';
	}
}

/*
 * Applies the same hash algorithm as the one used currently by the ASIC
 */
u32 rtl838x_hash(struct rtl838x_switch_priv *priv, u64 seed)
{
	u32 h1, h2, h3, h;

	if (sw_r32(priv->r->l2_ctrl_0) & 1) {
		h1 = (seed >> 11) & 0x7ff;
		h1 = ((h1 & 0x1f) << 6) | ((h1 >> 5) & 0x3f);

		h2 = (seed >> 33) & 0x7ff;
		h2 = ((h2 & 0x3f) << 5) | ((h2 >> 6) & 0x1f);

		h3 = (seed >> 44) & 0x7ff;
		h3 = ((h3 & 0x7f) << 4) | ((h3 >> 7) & 0xf);

		h = h1 ^ h2 ^ h3 ^ ((seed >> 55) & 0x1ff);
		h ^= ((seed >> 22) & 0x7ff) ^ (seed & 0x7ff);
	} else {
		h = ((seed >> 55) & 0x1ff) ^ ((seed >> 44) & 0x7ff)
			^ ((seed >> 33) & 0x7ff) ^ ((seed >> 22) & 0x7ff)
			^ ((seed >> 11) & 0x7ff) ^ (seed & 0x7ff);
	}

	return h;
}

void rtl838x_vlan_profile_dump(int index)
{
	u32 profile;

	if (index < 0 || index > 7)
		return;

	profile = sw_r32(RTL838X_VLAN_PROFILE(index));

	pr_debug("VLAN %d: L2 learning: %d, L2 Unknown MultiCast Field %x, \
		IPv4 Unknown MultiCast Field %x, IPv6 Unknown MultiCast Field: %x",
		index, profile & 1, (profile >> 1) & 0x1ff, (profile >> 10) & 0x1ff,
		(profile >> 19) & 0x1ff);
}