openwrt/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl931x.c

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

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

extern struct mutex smi_lock;
extern struct rtl83xx_soc_info soc_info;

inline void rtl931x_exec_tbl0_cmd(u32 cmd)
{
	sw_w32(cmd, RTL931X_TBL_ACCESS_CTRL_0);
	do { } while (sw_r32(RTL931X_TBL_ACCESS_CTRL_0) & (1 << 20));
}

inline void rtl931x_exec_tbl1_cmd(u32 cmd)
{
	sw_w32(cmd, RTL931X_TBL_ACCESS_CTRL_1);
	do { } while (sw_r32(RTL931X_TBL_ACCESS_CTRL_1) & (1 << 17));
}

inline int rtl931x_tbl_access_data_0(int i)
{
	return RTL931X_TBL_ACCESS_DATA_0(i);
}

void rtl931x_vlan_profile_dump(int index)
{
	u64 profile[4];

	if (index < 0 || index > 15)
		return;

	profile[0] = sw_r32(RTL931X_VLAN_PROFILE_SET(index));
	profile[1] = (sw_r32(RTL931X_VLAN_PROFILE_SET(index) + 4) & 0x1FFFFFFFULL) << 32
		| (sw_r32(RTL931X_VLAN_PROFILE_SET(index) + 8) & 0xFFFFFFFF);
	profile[2] = (sw_r32(RTL931X_VLAN_PROFILE_SET(index) + 16) & 0xFFFFFFFFULL) << 32
		| (sw_r32(RTL931X_VLAN_PROFILE_SET(index) + 12) & 0x1FFFFFFULL);
	profile[3] = (sw_r32(RTL931X_VLAN_PROFILE_SET(index) + 20) & 0x1FFFFFFFULL) << 32
		| (sw_r32(RTL931X_VLAN_PROFILE_SET(index) + 24) & 0xFFFFFFFF);

	pr_info("VLAN %d: L2 learning: %d, L2 Unknown MultiCast Field %llx, \
		IPv4 Unknown MultiCast Field %llx, IPv6 Unknown MultiCast Field: %llx",
		index, (u32) (profile[0] & (3 << 14)), profile[1], profile[2], profile[3]);
}

static void rtl931x_stp_get(struct rtl838x_switch_priv *priv, u16 msti, u32 port_state[])
{
	int i;
	u32 cmd = 1 << 20 /* Execute cmd */
		| 0 << 19 /* Read */
		| 2 << 15 /* Table type 0b10 */
		| (msti & 0x3fff);
	priv->r->exec_tbl0_cmd(cmd);

	for (i = 0; i < 4; i++)
		port_state[i] = sw_r32(priv->r->tbl_access_data_0(i));
}

static void rtl931x_stp_set(struct rtl838x_switch_priv *priv, u16 msti, u32 port_state[])
{
	int i;
	u32 cmd = 1 << 20 /* Execute cmd */
		| 1 << 19 /* Write */
		| 5 << 15 /* Table type 0b101 */
		| (msti & 0x3fff);
	for (i = 0; i < 4; i++)
		sw_w32(port_state[i], priv->r->tbl_access_data_0(i));
	priv->r->exec_tbl0_cmd(cmd);
}

inline static int rtl931x_trk_mbr_ctr(int group)
{
	return RTL931X_TRK_MBR_CTRL + (group << 2);
}

static void rtl931x_vlan_tables_read(u32 vlan, struct rtl838x_vlan_info *info)
{
	u32 v, w, x, y;
	// Read VLAN table (3) via register 0
	struct table_reg *r = rtl_table_get(RTL9310_TBL_0, 3);

	rtl_table_read(r, vlan);
	v = sw_r32(rtl_table_data(r, 0));
	w = sw_r32(rtl_table_data(r, 1));
	x = sw_r32(rtl_table_data(r, 2));
	y = sw_r32(rtl_table_data(r, 3));
	pr_debug("VLAN_READ %d: %08x %08x\n", vlan, v, w);
	rtl_table_release(r);

	info->tagged_ports = ((u64) v) << 25 | (w >> 7);
	info->profile_id = (x >> 16) & 0xf;
	info->hash_mc_fid = !!(x & BIT(30));
	info->hash_uc_fid = !!(x & BIT(31));
	info->fid = w & 0x7f;
	// TODO: use also info in 4th register

	// Read UNTAG table via table register 3
	r = rtl_table_get(RTL9310_TBL_3, 0);
	rtl_table_read(r, vlan);
	v = ((u64)sw_r32(rtl_table_data(r, 0))) << 25;
	v |= sw_r32(rtl_table_data(r, 1)) >> 7;
	rtl_table_release(r);

	info->untagged_ports = v;
}

static void rtl931x_vlan_set_tagged(u32 vlan, struct rtl838x_vlan_info *info)
{
	u32 v, w, x;
	// Access VLAN table (1) via register 0
	struct table_reg *r = rtl_table_get(RTL9310_TBL_0, 3);

	v = info->tagged_ports << 7;
	w = (info->tagged_ports & 0x7f000000) << 25;
	w |= (u32)info->fid;
	x = info->profile_id << 16;
	w |= info->hash_mc_fid ? BIT(30) : 0;
	w |= info->hash_uc_fid ? BIT(31) : 0;
	// TODO: use also info in 4th register

	sw_w32(v, rtl_table_data(r, 0));
	sw_w32(w, rtl_table_data(r, 1));
	sw_w32(x, rtl_table_data(r, 2));

	rtl_table_write(r, vlan);
	rtl_table_release(r);
}

static void rtl931x_vlan_set_untagged(u32 vlan, u64 portmask)
{
	struct table_reg *r = rtl_table_get(RTL9310_TBL_3, 0);

	rtl839x_set_port_reg_be(portmask << 7, rtl_table_data(r, 0));
	rtl_table_write(r, vlan);
	rtl_table_release(r);
}

static inline int rtl931x_mac_force_mode_ctrl(int p)
{
	return RTL931X_MAC_FORCE_MODE_CTRL + (p << 2);
}

static inline int rtl931x_mac_link_spd_sts(int p)
{
	return RTL931X_MAC_LINK_SPD_STS(p);
}

static inline int rtl931x_mac_port_ctrl(int p)
{
	return RTL931X_MAC_PORT_CTRL(p);
}

static inline int rtl931x_l2_port_new_salrn(int p)
{
	return RTL931X_L2_PORT_NEW_SALRN(p);
}

static inline int rtl931x_l2_port_new_sa_fwd(int p)
{
	return RTL931X_L2_PORT_NEW_SA_FWD(p);
}

static u64 rtl931x_read_l2_entry_using_hash(u32 hash, u32 position, struct rtl838x_l2_entry *e)
{
	u64 entry = 0;

	// TODO: Implement
	return entry;
}

static u64 rtl931x_read_cam(int idx, struct rtl838x_l2_entry *e)
{
	u64 entry = 0;

	// TODO: Implement
	return entry;
}

irqreturn_t rtl931x_switch_irq(int irq, void *dev_id)
{
	struct dsa_switch *ds = dev_id;
	u32 status = sw_r32(RTL931X_ISR_GLB_SRC);
	u64 ports = rtl839x_get_port_reg_le(RTL931X_ISR_PORT_LINK_STS_CHG);
	u64 link;
	int i;

	/* Clear status */
	rtl839x_set_port_reg_le(ports, RTL931X_ISR_PORT_LINK_STS_CHG);
	pr_info("RTL9310 Link change: status: %x, ports %llx\n", status, ports);

	for (i = 0; i < 56; i++) {
		if (ports & BIT_ULL(i)) {
			link = rtl839x_get_port_reg_le(RTL931X_MAC_LINK_STS);
			if (link & BIT_ULL(i))
				dsa_port_phylink_mac_change(ds, i, true);
			else
				dsa_port_phylink_mac_change(ds, i, false);
		}
	}
	return IRQ_HANDLED;
}

int rtl931x_write_phy(u32 port, u32 page, u32 reg, u32 val)
{
	u32 v;
	int err = 0;

	val &= 0xffff;
	if (port > 63 || page > 4095 || reg > 31)
		return -ENOTSUPP;

	mutex_lock(&smi_lock);
	/* Clear both port registers */
	sw_w32(0, RTL931X_SMI_INDRT_ACCESS_CTRL_2);
	sw_w32(0, RTL931X_SMI_INDRT_ACCESS_CTRL_2 + 4);
	sw_w32_mask(0, BIT(port), RTL931X_SMI_INDRT_ACCESS_CTRL_2+ (port % 32) * 4);

	sw_w32_mask(0xffff0000, val << 16, RTL931X_SMI_INDRT_ACCESS_CTRL_3);

	v = reg << 6 | page << 11 ;
	sw_w32(v, RTL931X_SMI_INDRT_ACCESS_CTRL_0);

	sw_w32(0x1ff, RTL931X_SMI_INDRT_ACCESS_CTRL_1);

	v |= 1 << 3 | 1; /* Write operation and execute */
	sw_w32(v, RTL931X_SMI_INDRT_ACCESS_CTRL_0);

	do {
	} while (sw_r32(RTL931X_SMI_INDRT_ACCESS_CTRL_0) & 0x1);

	if (sw_r32(RTL931X_SMI_INDRT_ACCESS_CTRL_0) & 0x2)
		err = -EIO;

	mutex_unlock(&smi_lock);
	return err;
}

int rtl931x_read_phy(u32 port, u32 page, u32 reg, u32 *val)
{
	u32 v;

	if (port > 63 || page > 4095 || reg > 31)
		return -ENOTSUPP;

	mutex_lock(&smi_lock);

	sw_w32_mask(0xffff, port, RTL931X_SMI_INDRT_ACCESS_CTRL_3);
	v = reg << 6 | page << 11; // TODO: ACCESS Offset? Park page
	sw_w32(v, RTL931X_SMI_INDRT_ACCESS_CTRL_0);

	sw_w32(0x1ff, RTL931X_SMI_INDRT_ACCESS_CTRL_1);

	v |= 1;
	sw_w32(v, RTL931X_SMI_INDRT_ACCESS_CTRL_0);

	do {
	} while (sw_r32(RTL931X_SMI_INDRT_ACCESS_CTRL_0) & 0x1);

	*val = (sw_r32(RTL931X_SMI_INDRT_ACCESS_CTRL_3) & 0xffff0000) >> 16;

	pr_info("%s: port %d, page: %d, reg: %x, val: %x\n", __func__, port, page, reg, *val);

	mutex_unlock(&smi_lock);
	return 0;
}

/*
 * Read an mmd register of the PHY
 */
int rtl931x_read_mmd_phy(u32 port, u32 devnum, u32 regnum, u32 *val)
{
	int err = 0;
	u32 v;
	int type = 1; // TODO: For C45 PHYs need to set to 2

	mutex_lock(&smi_lock);

	// Set PHY to access via port-number
	sw_w32(port << 5, RTL931X_SMI_INDRT_ACCESS_BC_PHYID_CTRL);

	// Set MMD device number and register to write to
	sw_w32(devnum << 16 | (regnum & 0xffff), RTL931X_SMI_INDRT_ACCESS_MMD_CTRL);

	v = type << 2 | BIT(0); // MMD-access-type | EXEC
	sw_w32(v, RTL931X_SMI_INDRT_ACCESS_CTRL_0);

	do {
		v = sw_r32(RTL931X_SMI_INDRT_ACCESS_CTRL_0);
	} while (v & BIT(0));

	// There is no error-checking via BIT 1 of v, as it does not seem to be set correctly

	*val = (sw_r32(RTL931X_SMI_INDRT_ACCESS_CTRL_3) & 0xffff);

	pr_debug("%s: port %d, regnum: %x, val: %x (err %d)\n", __func__, port, regnum, *val, err);

	mutex_unlock(&smi_lock);

	return err;
}

/*
 * Write to an mmd register of the PHY
 */
int rtl931x_write_mmd_phy(u32 port, u32 devnum, u32 regnum, u32 val)
{
	int err = 0;
	u32 v;
	int type = 1; // TODO: For C45 PHYs need to set to 2

	mutex_lock(&smi_lock);

	// Set PHY to access via port-number
	sw_w32(port << 5, RTL931X_SMI_INDRT_ACCESS_BC_PHYID_CTRL);

	// Set data to write
	sw_w32_mask(0xffff << 16, val << 16, RTL931X_SMI_INDRT_ACCESS_CTRL_3);

	// Set MMD device number and register to write to
	sw_w32(devnum << 16 | (regnum & 0xffff), RTL931X_SMI_INDRT_ACCESS_MMD_CTRL);

	v = BIT(4) | type << 2 | BIT(0); // WRITE | MMD-access-type | EXEC
	sw_w32(v, RTL931X_SMI_INDRT_ACCESS_CTRL_0);

	do {
		v = sw_r32(RTL931X_SMI_INDRT_ACCESS_CTRL_0);
	} while (v & BIT(0));

	pr_debug("%s: port %d, regnum: %x, val: %x (err %d)\n", __func__, port, regnum, val, err);
	mutex_unlock(&smi_lock);
	return err;
}

void rtl931x_print_matrix(void)
{
	volatile u64 *ptr = RTL838X_SW_BASE + RTL839X_PORT_ISO_CTRL(0);
	int i;

	for (i = 0; i < 52; i += 4)
		pr_info("> %16llx %16llx %16llx %16llx\n",
			ptr[i + 0], ptr[i + 1], ptr[i + 2], ptr[i + 3]);
	pr_info("CPU_PORT> %16llx\n", ptr[52]);
}

const struct rtl838x_reg rtl931x_reg = {
	.mask_port_reg_be = rtl839x_mask_port_reg_be,
	.set_port_reg_be = rtl839x_set_port_reg_be,
	.get_port_reg_be = rtl839x_get_port_reg_be,
	.mask_port_reg_le = rtl839x_mask_port_reg_le,
	.set_port_reg_le = rtl839x_set_port_reg_le,
	.get_port_reg_le = rtl839x_get_port_reg_le,
	.stat_port_rst = RTL931X_STAT_PORT_RST,
	.stat_rst = RTL931X_STAT_RST,
	.stat_port_std_mib = 0,  // Not defined
	.l2_ctrl_0 = RTL931X_L2_CTRL,
	.l2_ctrl_1 = RTL931X_L2_AGE_CTRL,
	.l2_port_aging_out = RTL931X_L2_PORT_AGE_CTRL,
	// .smi_poll_ctrl does not exist
	.l2_tbl_flush_ctrl = RTL931X_L2_TBL_FLUSH_CTRL,
	.exec_tbl0_cmd = rtl931x_exec_tbl0_cmd,
	.exec_tbl1_cmd = rtl931x_exec_tbl1_cmd,
	.tbl_access_data_0 = rtl931x_tbl_access_data_0,
	.isr_glb_src = RTL931X_ISR_GLB_SRC,
	.isr_port_link_sts_chg = RTL931X_ISR_PORT_LINK_STS_CHG,
	.imr_port_link_sts_chg = RTL931X_IMR_PORT_LINK_STS_CHG,
	// imr_glb does not exist on RTL931X
	.vlan_tables_read = rtl931x_vlan_tables_read,
	.vlan_set_tagged = rtl931x_vlan_set_tagged,
	.vlan_set_untagged = rtl931x_vlan_set_untagged,
	.vlan_profile_dump = rtl931x_vlan_profile_dump,
	.stp_get = rtl931x_stp_get,
	.stp_set = rtl931x_stp_set,
	.mac_force_mode_ctrl = rtl931x_mac_force_mode_ctrl,
	.mac_port_ctrl = rtl931x_mac_port_ctrl,
	.l2_port_new_salrn = rtl931x_l2_port_new_salrn,
	.l2_port_new_sa_fwd = rtl931x_l2_port_new_sa_fwd,
	.mir_ctrl = RTL931X_MIR_CTRL,
	.mir_dpm = RTL931X_MIR_DPM_CTRL,
	.mir_spm = RTL931X_MIR_SPM_CTRL,
	.mac_link_sts = RTL931X_MAC_LINK_STS,
	.mac_link_dup_sts = RTL931X_MAC_LINK_DUP_STS,
	.mac_link_spd_sts = rtl931x_mac_link_spd_sts,
	.mac_rx_pause_sts = RTL931X_MAC_RX_PAUSE_STS,
	.mac_tx_pause_sts = RTL931X_MAC_TX_PAUSE_STS,
	.read_l2_entry_using_hash = rtl931x_read_l2_entry_using_hash,
	.read_cam = rtl931x_read_cam,
	.vlan_port_egr_filter = RTL931X_VLAN_PORT_EGR_FLTR(0),
	.vlan_port_igr_filter = RTL931X_VLAN_PORT_IGR_FLTR(0),
//	.vlan_port_pb = does not exist
	.vlan_port_tag_sts_ctrl = RTL931X_VLAN_PORT_TAG_CTRL,
	.trk_mbr_ctr = rtl931x_trk_mbr_ctr,
};