OpenWrt – Rev 4
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/*
* Realtek RTL8366 SMI interface driver
*
* Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_gpio.h>
#include <linux/rtl8366.h>
#include <linux/version.h>
#include <linux/of_mdio.h>
#ifdef CONFIG_RTL8366_SMI_DEBUG_FS
#include <linux/debugfs.h>
#endif
#include "rtl8366_smi.h"
#define RTL8366_SMI_ACK_RETRY_COUNT 5
#define RTL8366_SMI_HW_STOP_DELAY 25 /* msecs */
#define RTL8366_SMI_HW_START_DELAY 100 /* msecs */
static inline void rtl8366_smi_clk_delay(struct rtl8366_smi *smi)
{
ndelay(smi->clk_delay);
}
static void rtl8366_smi_start(struct rtl8366_smi *smi)
{
unsigned int sda = smi->gpio_sda;
unsigned int sck = smi->gpio_sck;
/*
* Set GPIO pins to output mode, with initial state:
* SCK = 0, SDA = 1
*/
gpio_direction_output(sck, 0);
gpio_direction_output(sda, 1);
rtl8366_smi_clk_delay(smi);
/* CLK 1: 0 -> 1, 1 -> 0 */
gpio_set_value(sck, 1);
rtl8366_smi_clk_delay(smi);
gpio_set_value(sck, 0);
rtl8366_smi_clk_delay(smi);
/* CLK 2: */
gpio_set_value(sck, 1);
rtl8366_smi_clk_delay(smi);
gpio_set_value(sda, 0);
rtl8366_smi_clk_delay(smi);
gpio_set_value(sck, 0);
rtl8366_smi_clk_delay(smi);
gpio_set_value(sda, 1);
}
static void rtl8366_smi_stop(struct rtl8366_smi *smi)
{
unsigned int sda = smi->gpio_sda;
unsigned int sck = smi->gpio_sck;
rtl8366_smi_clk_delay(smi);
gpio_set_value(sda, 0);
gpio_set_value(sck, 1);
rtl8366_smi_clk_delay(smi);
gpio_set_value(sda, 1);
rtl8366_smi_clk_delay(smi);
gpio_set_value(sck, 1);
rtl8366_smi_clk_delay(smi);
gpio_set_value(sck, 0);
rtl8366_smi_clk_delay(smi);
gpio_set_value(sck, 1);
/* add a click */
rtl8366_smi_clk_delay(smi);
gpio_set_value(sck, 0);
rtl8366_smi_clk_delay(smi);
gpio_set_value(sck, 1);
/* set GPIO pins to input mode */
gpio_direction_input(sda);
gpio_direction_input(sck);
}
static void rtl8366_smi_write_bits(struct rtl8366_smi *smi, u32 data, u32 len)
{
unsigned int sda = smi->gpio_sda;
unsigned int sck = smi->gpio_sck;
for (; len > 0; len--) {
rtl8366_smi_clk_delay(smi);
/* prepare data */
gpio_set_value(sda, !!(data & ( 1 << (len - 1))));
rtl8366_smi_clk_delay(smi);
/* clocking */
gpio_set_value(sck, 1);
rtl8366_smi_clk_delay(smi);
gpio_set_value(sck, 0);
}
}
static void rtl8366_smi_read_bits(struct rtl8366_smi *smi, u32 len, u32 *data)
{
unsigned int sda = smi->gpio_sda;
unsigned int sck = smi->gpio_sck;
gpio_direction_input(sda);
for (*data = 0; len > 0; len--) {
u32 u;
rtl8366_smi_clk_delay(smi);
/* clocking */
gpio_set_value(sck, 1);
rtl8366_smi_clk_delay(smi);
u = !!gpio_get_value(sda);
gpio_set_value(sck, 0);
*data |= (u << (len - 1));
}
gpio_direction_output(sda, 0);
}
static int rtl8366_smi_wait_for_ack(struct rtl8366_smi *smi)
{
int retry_cnt;
retry_cnt = 0;
do {
u32 ack;
rtl8366_smi_read_bits(smi, 1, &ack);
if (ack == 0)
break;
if (++retry_cnt > RTL8366_SMI_ACK_RETRY_COUNT) {
dev_err(smi->parent, "ACK timeout\n");
return -ETIMEDOUT;
}
} while (1);
return 0;
}
static int rtl8366_smi_write_byte(struct rtl8366_smi *smi, u8 data)
{
rtl8366_smi_write_bits(smi, data, 8);
return rtl8366_smi_wait_for_ack(smi);
}
static int rtl8366_smi_write_byte_noack(struct rtl8366_smi *smi, u8 data)
{
rtl8366_smi_write_bits(smi, data, 8);
return 0;
}
static int rtl8366_smi_read_byte0(struct rtl8366_smi *smi, u8 *data)
{
u32 t;
/* read data */
rtl8366_smi_read_bits(smi, 8, &t);
*data = (t & 0xff);
/* send an ACK */
rtl8366_smi_write_bits(smi, 0x00, 1);
return 0;
}
static int rtl8366_smi_read_byte1(struct rtl8366_smi *smi, u8 *data)
{
u32 t;
/* read data */
rtl8366_smi_read_bits(smi, 8, &t);
*data = (t & 0xff);
/* send an ACK */
rtl8366_smi_write_bits(smi, 0x01, 1);
return 0;
}
static int __rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
{
unsigned long flags;
u8 lo = 0;
u8 hi = 0;
int ret;
spin_lock_irqsave(&smi->lock, flags);
rtl8366_smi_start(smi);
/* send READ command */
ret = rtl8366_smi_write_byte(smi, smi->cmd_read);
if (ret)
goto out;
/* set ADDR[7:0] */
ret = rtl8366_smi_write_byte(smi, addr & 0xff);
if (ret)
goto out;
/* set ADDR[15:8] */
ret = rtl8366_smi_write_byte(smi, addr >> 8);
if (ret)
goto out;
/* read DATA[7:0] */
rtl8366_smi_read_byte0(smi, &lo);
/* read DATA[15:8] */
rtl8366_smi_read_byte1(smi, &hi);
*data = ((u32) lo) | (((u32) hi) << 8);
ret = 0;
out:
rtl8366_smi_stop(smi);
spin_unlock_irqrestore(&smi->lock, flags);
return ret;
}
/* Read/write via mdiobus */
#define MDC_MDIO_CTRL0_REG 31
#define MDC_MDIO_START_REG 29
#define MDC_MDIO_CTRL1_REG 21
#define MDC_MDIO_ADDRESS_REG 23
#define MDC_MDIO_DATA_WRITE_REG 24
#define MDC_MDIO_DATA_READ_REG 25
#define MDC_MDIO_START_OP 0xFFFF
#define MDC_MDIO_ADDR_OP 0x000E
#define MDC_MDIO_READ_OP 0x0001
#define MDC_MDIO_WRITE_OP 0x0003
#define MDC_REALTEK_PHY_ADDR 0x0
int __rtl8366_mdio_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
{
u32 phy_id = MDC_REALTEK_PHY_ADDR;
struct mii_bus *mbus = smi->ext_mbus;
BUG_ON(in_interrupt());
mutex_lock(&mbus->mdio_lock);
/* Write Start command to register 29 */
mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
/* Write address control code to register 31 */
mbus->write(mbus, phy_id, MDC_MDIO_CTRL0_REG, MDC_MDIO_ADDR_OP);
/* Write Start command to register 29 */
mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
/* Write address to register 23 */
mbus->write(mbus, phy_id, MDC_MDIO_ADDRESS_REG, addr);
/* Write Start command to register 29 */
mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
/* Write read control code to register 21 */
mbus->write(mbus, phy_id, MDC_MDIO_CTRL1_REG, MDC_MDIO_READ_OP);
/* Write Start command to register 29 */
mbus->write(smi->ext_mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
/* Read data from register 25 */
*data = mbus->read(mbus, phy_id, MDC_MDIO_DATA_READ_REG);
mutex_unlock(&mbus->mdio_lock);
return 0;
}
static int __rtl8366_mdio_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
{
u32 phy_id = MDC_REALTEK_PHY_ADDR;
struct mii_bus *mbus = smi->ext_mbus;
BUG_ON(in_interrupt());
mutex_lock(&mbus->mdio_lock);
/* Write Start command to register 29 */
mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
/* Write address control code to register 31 */
mbus->write(mbus, phy_id, MDC_MDIO_CTRL0_REG, MDC_MDIO_ADDR_OP);
/* Write Start command to register 29 */
mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
/* Write address to register 23 */
mbus->write(mbus, phy_id, MDC_MDIO_ADDRESS_REG, addr);
/* Write Start command to register 29 */
mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
/* Write data to register 24 */
mbus->write(mbus, phy_id, MDC_MDIO_DATA_WRITE_REG, data);
/* Write Start command to register 29 */
mbus->write(mbus, phy_id, MDC_MDIO_START_REG, MDC_MDIO_START_OP);
/* Write data control code to register 21 */
mbus->write(mbus, phy_id, MDC_MDIO_CTRL1_REG, MDC_MDIO_WRITE_OP);
mutex_unlock(&mbus->mdio_lock);
return 0;
}
int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
{
if (smi->ext_mbus)
return __rtl8366_mdio_read_reg(smi, addr, data);
else
return __rtl8366_smi_read_reg(smi, addr, data);
}
EXPORT_SYMBOL_GPL(rtl8366_smi_read_reg);
static int __rtl8366_smi_write_reg(struct rtl8366_smi *smi,
u32 addr, u32 data, bool ack)
{
unsigned long flags;
int ret;
spin_lock_irqsave(&smi->lock, flags);
rtl8366_smi_start(smi);
/* send WRITE command */
ret = rtl8366_smi_write_byte(smi, smi->cmd_write);
if (ret)
goto out;
/* set ADDR[7:0] */
ret = rtl8366_smi_write_byte(smi, addr & 0xff);
if (ret)
goto out;
/* set ADDR[15:8] */
ret = rtl8366_smi_write_byte(smi, addr >> 8);
if (ret)
goto out;
/* write DATA[7:0] */
ret = rtl8366_smi_write_byte(smi, data & 0xff);
if (ret)
goto out;
/* write DATA[15:8] */
if (ack)
ret = rtl8366_smi_write_byte(smi, data >> 8);
else
ret = rtl8366_smi_write_byte_noack(smi, data >> 8);
if (ret)
goto out;
ret = 0;
out:
rtl8366_smi_stop(smi);
spin_unlock_irqrestore(&smi->lock, flags);
return ret;
}
int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
{
if (smi->ext_mbus)
return __rtl8366_mdio_write_reg(smi, addr, data);
else
return __rtl8366_smi_write_reg(smi, addr, data, true);
}
EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg);
int rtl8366_smi_write_reg_noack(struct rtl8366_smi *smi, u32 addr, u32 data)
{
return __rtl8366_smi_write_reg(smi, addr, data, false);
}
EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg_noack);
int rtl8366_smi_rmwr(struct rtl8366_smi *smi, u32 addr, u32 mask, u32 data)
{
u32 t;
int err;
err = rtl8366_smi_read_reg(smi, addr, &t);
if (err)
return err;
err = rtl8366_smi_write_reg(smi, addr, (t & ~mask) | data);
return err;
}
EXPORT_SYMBOL_GPL(rtl8366_smi_rmwr);
static int rtl8366_reset(struct rtl8366_smi *smi)
{
if (smi->hw_reset) {
smi->hw_reset(smi, true);
msleep(RTL8366_SMI_HW_STOP_DELAY);
smi->hw_reset(smi, false);
msleep(RTL8366_SMI_HW_START_DELAY);
return 0;
}
return smi->ops->reset_chip(smi);
}
static int rtl8366_mc_is_used(struct rtl8366_smi *smi, int mc_index, int *used)
{
int err;
int i;
*used = 0;
for (i = 0; i < smi->num_ports; i++) {
int index = 0;
err = smi->ops->get_mc_index(smi, i, &index);
if (err)
return err;
if (mc_index == index) {
*used = 1;
break;
}
}
return 0;
}
static int rtl8366_set_vlan(struct rtl8366_smi *smi, int vid, u32 member,
u32 untag, u32 fid)
{
struct rtl8366_vlan_4k vlan4k;
int err;
int i;
/* Update the 4K table */
err = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
if (err)
return err;
vlan4k.member = member;
vlan4k.untag = untag;
vlan4k.fid = fid;
err = smi->ops->set_vlan_4k(smi, &vlan4k);
if (err)
return err;
/* Try to find an existing MC entry for this VID */
for (i = 0; i < smi->num_vlan_mc; i++) {
struct rtl8366_vlan_mc vlanmc;
err = smi->ops->get_vlan_mc(smi, i, &vlanmc);
if (err)
return err;
if (vid == vlanmc.vid) {
/* update the MC entry */
vlanmc.member = member;
vlanmc.untag = untag;
vlanmc.fid = fid;
err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
break;
}
}
return err;
}
static int rtl8366_get_pvid(struct rtl8366_smi *smi, int port, int *val)
{
struct rtl8366_vlan_mc vlanmc;
int err;
int index;
err = smi->ops->get_mc_index(smi, port, &index);
if (err)
return err;
err = smi->ops->get_vlan_mc(smi, index, &vlanmc);
if (err)
return err;
*val = vlanmc.vid;
return 0;
}
static int rtl8366_set_pvid(struct rtl8366_smi *smi, unsigned port,
unsigned vid)
{
struct rtl8366_vlan_mc vlanmc;
struct rtl8366_vlan_4k vlan4k;
int err;
int i;
/* Try to find an existing MC entry for this VID */
for (i = 0; i < smi->num_vlan_mc; i++) {
err = smi->ops->get_vlan_mc(smi, i, &vlanmc);
if (err)
return err;
if (vid == vlanmc.vid) {
err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
if (err)
return err;
err = smi->ops->set_mc_index(smi, port, i);
return err;
}
}
/* We have no MC entry for this VID, try to find an empty one */
for (i = 0; i < smi->num_vlan_mc; i++) {
err = smi->ops->get_vlan_mc(smi, i, &vlanmc);
if (err)
return err;
if (vlanmc.vid == 0 && vlanmc.member == 0) {
/* Update the entry from the 4K table */
err = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
if (err)
return err;
vlanmc.vid = vid;
vlanmc.member = vlan4k.member;
vlanmc.untag = vlan4k.untag;
vlanmc.fid = vlan4k.fid;
err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
if (err)
return err;
err = smi->ops->set_mc_index(smi, port, i);
return err;
}
}
/* MC table is full, try to find an unused entry and replace it */
for (i = 0; i < smi->num_vlan_mc; i++) {
int used;
err = rtl8366_mc_is_used(smi, i, &used);
if (err)
return err;
if (!used) {
/* Update the entry from the 4K table */
err = smi->ops->get_vlan_4k(smi, vid, &vlan4k);
if (err)
return err;
vlanmc.vid = vid;
vlanmc.member = vlan4k.member;
vlanmc.untag = vlan4k.untag;
vlanmc.fid = vlan4k.fid;
err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
if (err)
return err;
err = smi->ops->set_mc_index(smi, port, i);
return err;
}
}
dev_err(smi->parent,
"all VLAN member configurations are in use\n");
return -ENOSPC;
}
int rtl8366_enable_vlan(struct rtl8366_smi *smi, int enable)
{
int err;
err = smi->ops->enable_vlan(smi, enable);
if (err)
return err;
smi->vlan_enabled = enable;
if (!enable) {
smi->vlan4k_enabled = 0;
err = smi->ops->enable_vlan4k(smi, enable);
}
return err;
}
EXPORT_SYMBOL_GPL(rtl8366_enable_vlan);
static int rtl8366_enable_vlan4k(struct rtl8366_smi *smi, int enable)
{
int err;
if (enable) {
err = smi->ops->enable_vlan(smi, enable);
if (err)
return err;
smi->vlan_enabled = enable;
}
err = smi->ops->enable_vlan4k(smi, enable);
if (err)
return err;
smi->vlan4k_enabled = enable;
return 0;
}
int rtl8366_enable_all_ports(struct rtl8366_smi *smi, int enable)
{
int port;
int err;
for (port = 0; port < smi->num_ports; port++) {
err = smi->ops->enable_port(smi, port, enable);
if (err)
return err;
}
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_enable_all_ports);
int rtl8366_reset_vlan(struct rtl8366_smi *smi)
{
struct rtl8366_vlan_mc vlanmc;
int err;
int i;
rtl8366_enable_vlan(smi, 0);
rtl8366_enable_vlan4k(smi, 0);
/* clear VLAN member configurations */
vlanmc.vid = 0;
vlanmc.priority = 0;
vlanmc.member = 0;
vlanmc.untag = 0;
vlanmc.fid = 0;
for (i = 0; i < smi->num_vlan_mc; i++) {
err = smi->ops->set_vlan_mc(smi, i, &vlanmc);
if (err)
return err;
}
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_reset_vlan);
static int rtl8366_init_vlan(struct rtl8366_smi *smi)
{
int port;
int err;
err = rtl8366_reset_vlan(smi);
if (err)
return err;
for (port = 0; port < smi->num_ports; port++) {
u32 mask;
if (port == smi->cpu_port)
mask = (1 << smi->num_ports) - 1;
else
mask = (1 << port) | (1 << smi->cpu_port);
err = rtl8366_set_vlan(smi, (port + 1), mask, mask, 0);
if (err)
return err;
err = rtl8366_set_pvid(smi, port, (port + 1));
if (err)
return err;
}
return rtl8366_enable_vlan(smi, 1);
}
#ifdef CONFIG_RTL8366_SMI_DEBUG_FS
int rtl8366_debugfs_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_debugfs_open);
static ssize_t rtl8366_read_debugfs_vlan_mc(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
int i, len = 0;
char *buf = smi->buf;
len += snprintf(buf + len, sizeof(smi->buf) - len,
"%2s %6s %4s %6s %6s %3s\n",
"id", "vid","prio", "member", "untag", "fid");
for (i = 0; i < smi->num_vlan_mc; ++i) {
struct rtl8366_vlan_mc vlanmc;
smi->ops->get_vlan_mc(smi, i, &vlanmc);
len += snprintf(buf + len, sizeof(smi->buf) - len,
"%2d %6d %4d 0x%04x 0x%04x %3d\n",
i, vlanmc.vid, vlanmc.priority,
vlanmc.member, vlanmc.untag, vlanmc.fid);
}
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
#define RTL8366_VLAN4K_PAGE_SIZE 64
#define RTL8366_VLAN4K_NUM_PAGES (4096 / RTL8366_VLAN4K_PAGE_SIZE)
static ssize_t rtl8366_read_debugfs_vlan_4k(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
int i, len = 0;
int offset;
char *buf = smi->buf;
if (smi->dbg_vlan_4k_page >= RTL8366_VLAN4K_NUM_PAGES) {
len += snprintf(buf + len, sizeof(smi->buf) - len,
"invalid page: %u\n", smi->dbg_vlan_4k_page);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
len += snprintf(buf + len, sizeof(smi->buf) - len,
"%4s %6s %6s %3s\n",
"vid", "member", "untag", "fid");
offset = RTL8366_VLAN4K_PAGE_SIZE * smi->dbg_vlan_4k_page;
for (i = 0; i < RTL8366_VLAN4K_PAGE_SIZE; i++) {
struct rtl8366_vlan_4k vlan4k;
smi->ops->get_vlan_4k(smi, offset + i, &vlan4k);
len += snprintf(buf + len, sizeof(smi->buf) - len,
"%4d 0x%04x 0x%04x %3d\n",
vlan4k.vid, vlan4k.member,
vlan4k.untag, vlan4k.fid);
}
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t rtl8366_read_debugfs_pvid(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
char *buf = smi->buf;
int len = 0;
int i;
len += snprintf(buf + len, sizeof(smi->buf) - len, "%4s %4s\n",
"port", "pvid");
for (i = 0; i < smi->num_ports; i++) {
int pvid;
int err;
err = rtl8366_get_pvid(smi, i, &pvid);
if (err)
len += snprintf(buf + len, sizeof(smi->buf) - len,
"%4d error\n", i);
else
len += snprintf(buf + len, sizeof(smi->buf) - len,
"%4d %4d\n", i, pvid);
}
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t rtl8366_read_debugfs_reg(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
u32 t, reg = smi->dbg_reg;
int err, len = 0;
char *buf = smi->buf;
memset(buf, '\0', sizeof(smi->buf));
err = rtl8366_smi_read_reg(smi, reg, &t);
if (err) {
len += snprintf(buf, sizeof(smi->buf),
"Read failed (reg: 0x%04x)\n", reg);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
len += snprintf(buf, sizeof(smi->buf), "reg = 0x%04x, val = 0x%04x\n",
reg, t);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t rtl8366_write_debugfs_reg(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct rtl8366_smi *smi = (struct rtl8366_smi *)file->private_data;
unsigned long data;
u32 reg = smi->dbg_reg;
int err;
size_t len;
char *buf = smi->buf;
len = min(count, sizeof(smi->buf) - 1);
if (copy_from_user(buf, user_buf, len)) {
dev_err(smi->parent, "copy from user failed\n");
return -EFAULT;
}
buf[len] = '\0';
if (len > 0 && buf[len - 1] == '\n')
buf[len - 1] = '\0';
if (kstrtoul(buf, 16, &data)) {
dev_err(smi->parent, "Invalid reg value %s\n", buf);
} else {
err = rtl8366_smi_write_reg(smi, reg, data);
if (err) {
dev_err(smi->parent,
"writing reg 0x%04x val 0x%04lx failed\n",
reg, data);
}
}
return count;
}
static ssize_t rtl8366_read_debugfs_mibs(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct rtl8366_smi *smi = file->private_data;
int i, j, len = 0;
char *buf = smi->buf;
len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s",
"Counter");
for (i = 0; i < smi->num_ports; i++) {
char port_buf[10];
snprintf(port_buf, sizeof(port_buf), "Port %d", i);
len += snprintf(buf + len, sizeof(smi->buf) - len, " %12s",
port_buf);
}
len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
for (i = 0; i < smi->num_mib_counters; i++) {
len += snprintf(buf + len, sizeof(smi->buf) - len, "%-36s ",
smi->mib_counters[i].name);
for (j = 0; j < smi->num_ports; j++) {
unsigned long long counter = 0;
if (!smi->ops->get_mib_counter(smi, i, j, &counter))
len += snprintf(buf + len,
sizeof(smi->buf) - len,
"%12llu ", counter);
else
len += snprintf(buf + len,
sizeof(smi->buf) - len,
"%12s ", "error");
}
len += snprintf(buf + len, sizeof(smi->buf) - len, "\n");
}
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static const struct file_operations fops_rtl8366_regs = {
.read = rtl8366_read_debugfs_reg,
.write = rtl8366_write_debugfs_reg,
.open = rtl8366_debugfs_open,
.owner = THIS_MODULE
};
static const struct file_operations fops_rtl8366_vlan_mc = {
.read = rtl8366_read_debugfs_vlan_mc,
.open = rtl8366_debugfs_open,
.owner = THIS_MODULE
};
static const struct file_operations fops_rtl8366_vlan_4k = {
.read = rtl8366_read_debugfs_vlan_4k,
.open = rtl8366_debugfs_open,
.owner = THIS_MODULE
};
static const struct file_operations fops_rtl8366_pvid = {
.read = rtl8366_read_debugfs_pvid,
.open = rtl8366_debugfs_open,
.owner = THIS_MODULE
};
static const struct file_operations fops_rtl8366_mibs = {
.read = rtl8366_read_debugfs_mibs,
.open = rtl8366_debugfs_open,
.owner = THIS_MODULE
};
static void rtl8366_debugfs_init(struct rtl8366_smi *smi)
{
struct dentry *node;
struct dentry *root;
if (!smi->debugfs_root)
smi->debugfs_root = debugfs_create_dir(dev_name(smi->parent),
NULL);
if (!smi->debugfs_root) {
dev_err(smi->parent, "Unable to create debugfs dir\n");
return;
}
root = smi->debugfs_root;
node = debugfs_create_x16("reg", S_IRUGO | S_IWUSR, root,
&smi->dbg_reg);
if (!node) {
dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
"reg");
return;
}
node = debugfs_create_file("val", S_IRUGO | S_IWUSR, root, smi,
&fops_rtl8366_regs);
if (!node) {
dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
"val");
return;
}
node = debugfs_create_file("vlan_mc", S_IRUSR, root, smi,
&fops_rtl8366_vlan_mc);
if (!node) {
dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
"vlan_mc");
return;
}
node = debugfs_create_u8("vlan_4k_page", S_IRUGO | S_IWUSR, root,
&smi->dbg_vlan_4k_page);
if (!node) {
dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
"vlan_4k_page");
return;
}
node = debugfs_create_file("vlan_4k", S_IRUSR, root, smi,
&fops_rtl8366_vlan_4k);
if (!node) {
dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
"vlan_4k");
return;
}
node = debugfs_create_file("pvid", S_IRUSR, root, smi,
&fops_rtl8366_pvid);
if (!node) {
dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
"pvid");
return;
}
node = debugfs_create_file("mibs", S_IRUSR, smi->debugfs_root, smi,
&fops_rtl8366_mibs);
if (!node)
dev_err(smi->parent, "Creating debugfs file '%s' failed\n",
"mibs");
}
static void rtl8366_debugfs_remove(struct rtl8366_smi *smi)
{
if (smi->debugfs_root) {
debugfs_remove_recursive(smi->debugfs_root);
smi->debugfs_root = NULL;
}
}
#else
static inline void rtl8366_debugfs_init(struct rtl8366_smi *smi) {}
static inline void rtl8366_debugfs_remove(struct rtl8366_smi *smi) {}
#endif /* CONFIG_RTL8366_SMI_DEBUG_FS */
static int rtl8366_smi_mii_init(struct rtl8366_smi *smi)
{
int ret;
#ifdef CONFIG_OF
struct device_node *np = NULL;
np = of_get_child_by_name(smi->parent->of_node, "mdio-bus");
#endif
smi->mii_bus = mdiobus_alloc();
if (smi->mii_bus == NULL) {
ret = -ENOMEM;
goto err;
}
smi->mii_bus->priv = (void *) smi;
smi->mii_bus->name = dev_name(smi->parent);
smi->mii_bus->read = smi->ops->mii_read;
smi->mii_bus->write = smi->ops->mii_write;
snprintf(smi->mii_bus->id, MII_BUS_ID_SIZE, "%s",
dev_name(smi->parent));
smi->mii_bus->parent = smi->parent;
smi->mii_bus->phy_mask = ~(0x1f);
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
{
int i;
smi->mii_bus->irq = smi->mii_irq;
for (i = 0; i < PHY_MAX_ADDR; i++)
smi->mii_irq[i] = PHY_POLL;
}
#endif
#ifdef CONFIG_OF
if (np)
ret = of_mdiobus_register(smi->mii_bus, np);
else
#endif
ret = mdiobus_register(smi->mii_bus);
if (ret)
goto err_free;
return 0;
err_free:
mdiobus_free(smi->mii_bus);
err:
return ret;
}
static void rtl8366_smi_mii_cleanup(struct rtl8366_smi *smi)
{
mdiobus_unregister(smi->mii_bus);
mdiobus_free(smi->mii_bus);
}
int rtl8366_sw_reset_switch(struct switch_dev *dev)
{
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
int err;
err = rtl8366_reset(smi);
if (err)
return err;
err = smi->ops->setup(smi);
if (err)
return err;
err = rtl8366_reset_vlan(smi);
if (err)
return err;
err = rtl8366_enable_vlan(smi, 1);
if (err)
return err;
return rtl8366_enable_all_ports(smi, 1);
}
EXPORT_SYMBOL_GPL(rtl8366_sw_reset_switch);
int rtl8366_sw_get_port_pvid(struct switch_dev *dev, int port, int *val)
{
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
return rtl8366_get_pvid(smi, port, val);
}
EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_pvid);
int rtl8366_sw_set_port_pvid(struct switch_dev *dev, int port, int val)
{
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
return rtl8366_set_pvid(smi, port, val);
}
EXPORT_SYMBOL_GPL(rtl8366_sw_set_port_pvid);
int rtl8366_sw_get_port_mib(struct switch_dev *dev,
const struct switch_attr *attr,
struct switch_val *val)
{
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
int i, len = 0;
unsigned long long counter = 0;
char *buf = smi->buf;
if (val->port_vlan >= smi->num_ports)
return -EINVAL;
len += snprintf(buf + len, sizeof(smi->buf) - len,
"Port %d MIB counters\n",
val->port_vlan);
for (i = 0; i < smi->num_mib_counters; ++i) {
len += snprintf(buf + len, sizeof(smi->buf) - len,
"%-36s: ", smi->mib_counters[i].name);
if (!smi->ops->get_mib_counter(smi, i, val->port_vlan,
&counter))
len += snprintf(buf + len, sizeof(smi->buf) - len,
"%llu\n", counter);
else
len += snprintf(buf + len, sizeof(smi->buf) - len,
"%s\n", "error");
}
val->value.s = buf;
val->len = len;
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_mib);
int rtl8366_sw_get_port_stats(struct switch_dev *dev, int port,
struct switch_port_stats *stats,
int txb_id, int rxb_id)
{
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
unsigned long long counter = 0;
int ret;
if (port >= smi->num_ports)
return -EINVAL;
ret = smi->ops->get_mib_counter(smi, txb_id, port, &counter);
if (ret)
return ret;
stats->tx_bytes = counter;
ret = smi->ops->get_mib_counter(smi, rxb_id, port, &counter);
if (ret)
return ret;
stats->rx_bytes = counter;
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_sw_get_port_stats);
int rtl8366_sw_get_vlan_info(struct switch_dev *dev,
const struct switch_attr *attr,
struct switch_val *val)
{
int i;
u32 len = 0;
struct rtl8366_vlan_4k vlan4k;
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
char *buf = smi->buf;
int err;
if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
return -EINVAL;
memset(buf, '\0', sizeof(smi->buf));
err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
if (err)
return err;
len += snprintf(buf + len, sizeof(smi->buf) - len,
"VLAN %d: Ports: '", vlan4k.vid);
for (i = 0; i < smi->num_ports; i++) {
if (!(vlan4k.member & (1 << i)))
continue;
len += snprintf(buf + len, sizeof(smi->buf) - len, "%d%s", i,
(vlan4k.untag & (1 << i)) ? "" : "t");
}
len += snprintf(buf + len, sizeof(smi->buf) - len,
"', members=%04x, untag=%04x, fid=%u",
vlan4k.member, vlan4k.untag, vlan4k.fid);
val->value.s = buf;
val->len = len;
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_info);
int rtl8366_sw_get_vlan_ports(struct switch_dev *dev, struct switch_val *val)
{
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
struct switch_port *port;
struct rtl8366_vlan_4k vlan4k;
int i;
if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
return -EINVAL;
smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
port = &val->value.ports[0];
val->len = 0;
for (i = 0; i < smi->num_ports; i++) {
if (!(vlan4k.member & BIT(i)))
continue;
port->id = i;
port->flags = (vlan4k.untag & BIT(i)) ?
0 : BIT(SWITCH_PORT_FLAG_TAGGED);
val->len++;
port++;
}
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_ports);
int rtl8366_sw_set_vlan_ports(struct switch_dev *dev, struct switch_val *val)
{
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
struct switch_port *port;
u32 member = 0;
u32 untag = 0;
int err;
int i;
if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
return -EINVAL;
port = &val->value.ports[0];
for (i = 0; i < val->len; i++, port++) {
int pvid = 0;
member |= BIT(port->id);
if (!(port->flags & BIT(SWITCH_PORT_FLAG_TAGGED)))
untag |= BIT(port->id);
/*
* To ensure that we have a valid MC entry for this VLAN,
* initialize the port VLAN ID here.
*/
err = rtl8366_get_pvid(smi, port->id, &pvid);
if (err < 0)
return err;
if (pvid == 0) {
err = rtl8366_set_pvid(smi, port->id, val->port_vlan);
if (err < 0)
return err;
}
}
return rtl8366_set_vlan(smi, val->port_vlan, member, untag, 0);
}
EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_ports);
int rtl8366_sw_get_vlan_fid(struct switch_dev *dev,
const struct switch_attr *attr,
struct switch_val *val)
{
struct rtl8366_vlan_4k vlan4k;
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
int err;
if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
return -EINVAL;
err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
if (err)
return err;
val->value.i = vlan4k.fid;
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_fid);
int rtl8366_sw_set_vlan_fid(struct switch_dev *dev,
const struct switch_attr *attr,
struct switch_val *val)
{
struct rtl8366_vlan_4k vlan4k;
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
int err;
if (!smi->ops->is_vlan_valid(smi, val->port_vlan))
return -EINVAL;
if (val->value.i < 0 || val->value.i > attr->max)
return -EINVAL;
err = smi->ops->get_vlan_4k(smi, val->port_vlan, &vlan4k);
if (err)
return err;
return rtl8366_set_vlan(smi, val->port_vlan,
vlan4k.member,
vlan4k.untag,
val->value.i);
}
EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_fid);
int rtl8366_sw_get_vlan_enable(struct switch_dev *dev,
const struct switch_attr *attr,
struct switch_val *val)
{
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
if (attr->ofs > 2)
return -EINVAL;
if (attr->ofs == 1)
val->value.i = smi->vlan_enabled;
else
val->value.i = smi->vlan4k_enabled;
return 0;
}
EXPORT_SYMBOL_GPL(rtl8366_sw_get_vlan_enable);
int rtl8366_sw_set_vlan_enable(struct switch_dev *dev,
const struct switch_attr *attr,
struct switch_val *val)
{
struct rtl8366_smi *smi = sw_to_rtl8366_smi(dev);
int err;
if (attr->ofs > 2)
return -EINVAL;
if (attr->ofs == 1)
err = rtl8366_enable_vlan(smi, val->value.i);
else
err = rtl8366_enable_vlan4k(smi, val->value.i);
return err;
}
EXPORT_SYMBOL_GPL(rtl8366_sw_set_vlan_enable);
struct rtl8366_smi *rtl8366_smi_alloc(struct device *parent)
{
struct rtl8366_smi *smi;
BUG_ON(!parent);
smi = kzalloc(sizeof(*smi), GFP_KERNEL);
if (!smi) {
dev_err(parent, "no memory for private data\n");
return NULL;
}
smi->parent = parent;
return smi;
}
EXPORT_SYMBOL_GPL(rtl8366_smi_alloc);
static int __rtl8366_smi_init(struct rtl8366_smi *smi, const char *name)
{
int err;
if (!smi->ext_mbus) {
err = gpio_request(smi->gpio_sda, name);
if (err) {
printk(KERN_ERR "rtl8366_smi: gpio_request failed for %u, err=%d\n",
smi->gpio_sda, err);
goto err_out;
}
err = gpio_request(smi->gpio_sck, name);
if (err) {
printk(KERN_ERR "rtl8366_smi: gpio_request failed for %u, err=%d\n",
smi->gpio_sck, err);
goto err_free_sda;
}
}
spin_lock_init(&smi->lock);
/* start the switch */
if (smi->hw_reset) {
smi->hw_reset(smi, false);
msleep(RTL8366_SMI_HW_START_DELAY);
}
return 0;
err_free_sda:
gpio_free(smi->gpio_sda);
err_out:
return err;
}
static void __rtl8366_smi_cleanup(struct rtl8366_smi *smi)
{
if (smi->hw_reset)
smi->hw_reset(smi, true);
if (!smi->ext_mbus) {
gpio_free(smi->gpio_sck);
gpio_free(smi->gpio_sda);
}
}
enum rtl8366_type rtl8366_smi_detect(struct rtl8366_platform_data *pdata)
{
static struct rtl8366_smi smi;
enum rtl8366_type type = RTL8366_TYPE_UNKNOWN;
u32 reg = 0;
memset(&smi, 0, sizeof(smi));
smi.gpio_sda = pdata->gpio_sda;
smi.gpio_sck = pdata->gpio_sck;
smi.clk_delay = 10;
smi.cmd_read = 0xa9;
smi.cmd_write = 0xa8;
if (__rtl8366_smi_init(&smi, "rtl8366"))
goto out;
if (rtl8366_smi_read_reg(&smi, 0x5c, ®))
goto cleanup;
switch(reg) {
case 0x6027:
printk("Found an RTL8366S switch\n");
type = RTL8366_TYPE_S;
break;
case 0x5937:
printk("Found an RTL8366RB switch\n");
type = RTL8366_TYPE_RB;
break;
default:
printk("Found an Unknown RTL8366 switch (id=0x%04x)\n", reg);
break;
}
cleanup:
__rtl8366_smi_cleanup(&smi);
out:
return type;
}
int rtl8366_smi_init(struct rtl8366_smi *smi)
{
int err;
if (!smi->ops)
return -EINVAL;
err = __rtl8366_smi_init(smi, dev_name(smi->parent));
if (err)
goto err_out;
if (!smi->ext_mbus)
dev_info(smi->parent, "using GPIO pins %u (SDA) and %u (SCK)\n",
smi->gpio_sda, smi->gpio_sck);
else
dev_info(smi->parent, "using MDIO bus '%s'\n", smi->ext_mbus->name);
err = smi->ops->detect(smi);
if (err) {
dev_err(smi->parent, "chip detection failed, err=%d\n", err);
goto err_free_sck;
}
err = rtl8366_reset(smi);
if (err)
goto err_free_sck;
err = smi->ops->setup(smi);
if (err) {
dev_err(smi->parent, "chip setup failed, err=%d\n", err);
goto err_free_sck;
}
err = rtl8366_init_vlan(smi);
if (err) {
dev_err(smi->parent, "VLAN initialization failed, err=%d\n",
err);
goto err_free_sck;
}
err = rtl8366_enable_all_ports(smi, 1);
if (err)
goto err_free_sck;
err = rtl8366_smi_mii_init(smi);
if (err)
goto err_free_sck;
rtl8366_debugfs_init(smi);
return 0;
err_free_sck:
__rtl8366_smi_cleanup(smi);
err_out:
return err;
}
EXPORT_SYMBOL_GPL(rtl8366_smi_init);
void rtl8366_smi_cleanup(struct rtl8366_smi *smi)
{
rtl8366_debugfs_remove(smi);
rtl8366_smi_mii_cleanup(smi);
__rtl8366_smi_cleanup(smi);
}
EXPORT_SYMBOL_GPL(rtl8366_smi_cleanup);
#ifdef CONFIG_OF
static void rtl8366_smi_reset(struct rtl8366_smi *smi, bool active)
{
if (active)
reset_control_assert(smi->reset);
else
reset_control_deassert(smi->reset);
}
int rtl8366_smi_probe_of(struct platform_device *pdev, struct rtl8366_smi *smi)
{
int sck = of_get_named_gpio(pdev->dev.of_node, "gpio-sck", 0);
int sda = of_get_named_gpio(pdev->dev.of_node, "gpio-sda", 0);
struct device_node *np = pdev->dev.of_node;
struct device_node *mdio_node;
mdio_node = of_parse_phandle(np, "mii-bus", 0);
if (!mdio_node) {
dev_err(&pdev->dev, "cannot find mdio node phandle");
goto try_gpio;
}
smi->ext_mbus = of_mdio_find_bus(mdio_node);
if (!smi->ext_mbus) {
dev_info(&pdev->dev,
"cannot find mdio bus from bus handle (yet)");
goto try_gpio;
}
return 0;
try_gpio:
if (!gpio_is_valid(sck) || !gpio_is_valid(sda)) {
if (!mdio_node) {
dev_err(&pdev->dev, "gpios missing in devictree\n");
return -EINVAL;
} else {
return -EPROBE_DEFER;
}
}
smi->gpio_sda = sda;
smi->gpio_sck = sck;
smi->reset = devm_reset_control_get(&pdev->dev, "switch");
if (!IS_ERR(smi->reset))
smi->hw_reset = rtl8366_smi_reset;
return 0;
}
#else
static inline int rtl8366_smi_probe_of(struct platform_device *pdev, struct rtl8366_smi *smi)
{
return -ENODEV;
}
#endif
int rtl8366_smi_probe_plat(struct platform_device *pdev, struct rtl8366_smi *smi)
{
struct rtl8366_platform_data *pdata = pdev->dev.platform_data;
if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "no platform data specified\n");
return -EINVAL;
}
smi->gpio_sda = pdata->gpio_sda;
smi->gpio_sck = pdata->gpio_sck;
smi->hw_reset = pdata->hw_reset;
return 0;
}
struct rtl8366_smi *rtl8366_smi_probe(struct platform_device *pdev)
{
struct rtl8366_smi *smi;
int err;
smi = rtl8366_smi_alloc(&pdev->dev);
if (!smi)
return NULL;
if (pdev->dev.of_node)
err = rtl8366_smi_probe_of(pdev, smi);
else
err = rtl8366_smi_probe_plat(pdev, smi);
if (err)
goto free_smi;
return smi;
free_smi:
kfree(smi);
return ERR_PTR(err);
}
EXPORT_SYMBOL_GPL(rtl8366_smi_probe);
MODULE_DESCRIPTION("Realtek RTL8366 SMI interface driver");
MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
MODULE_LICENSE("GPL v2");