forked from Minki/linux
0fb98db197
The mac settings like RGMII/RMII, speeds etc are done in the so called "General Register Files", contain numerous other settings as well and always seem to change between Rockchip SoCs. Therefore abstract the register accesses into a per-soc ops struct to make this reusable on other Rockchip SoCs. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: David S. Miller <davem@davemloft.net>
490 lines
13 KiB
C
490 lines
13 KiB
C
/**
|
|
* dwmac-rk.c - Rockchip RK3288 DWMAC specific glue layer
|
|
*
|
|
* Copyright (C) 2014 Chen-Zhi (Roger Chen)
|
|
*
|
|
* Chen-Zhi (Roger Chen) <roger.chen@rock-chips.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/stmmac.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/phy.h>
|
|
#include <linux/of_net.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_gpio.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#include "stmmac_platform.h"
|
|
|
|
struct rk_priv_data;
|
|
struct rk_gmac_ops {
|
|
void (*set_to_rgmii)(struct rk_priv_data *bsp_priv,
|
|
int tx_delay, int rx_delay);
|
|
void (*set_to_rmii)(struct rk_priv_data *bsp_priv);
|
|
void (*set_rgmii_speed)(struct rk_priv_data *bsp_priv, int speed);
|
|
void (*set_rmii_speed)(struct rk_priv_data *bsp_priv, int speed);
|
|
};
|
|
|
|
struct rk_priv_data {
|
|
struct platform_device *pdev;
|
|
int phy_iface;
|
|
struct regulator *regulator;
|
|
struct rk_gmac_ops *ops;
|
|
|
|
bool clk_enabled;
|
|
bool clock_input;
|
|
|
|
struct clk *clk_mac;
|
|
struct clk *gmac_clkin;
|
|
struct clk *mac_clk_rx;
|
|
struct clk *mac_clk_tx;
|
|
struct clk *clk_mac_ref;
|
|
struct clk *clk_mac_refout;
|
|
struct clk *aclk_mac;
|
|
struct clk *pclk_mac;
|
|
|
|
int tx_delay;
|
|
int rx_delay;
|
|
|
|
struct regmap *grf;
|
|
};
|
|
|
|
#define HIWORD_UPDATE(val, mask, shift) \
|
|
((val) << (shift) | (mask) << ((shift) + 16))
|
|
|
|
#define GRF_BIT(nr) (BIT(nr) | BIT(nr+16))
|
|
#define GRF_CLR_BIT(nr) (BIT(nr+16))
|
|
|
|
#define RK3288_GRF_SOC_CON1 0x0248
|
|
#define RK3288_GRF_SOC_CON3 0x0250
|
|
|
|
/*RK3288_GRF_SOC_CON1*/
|
|
#define RK3288_GMAC_PHY_INTF_SEL_RGMII (GRF_BIT(6) | GRF_CLR_BIT(7) | \
|
|
GRF_CLR_BIT(8))
|
|
#define RK3288_GMAC_PHY_INTF_SEL_RMII (GRF_CLR_BIT(6) | GRF_CLR_BIT(7) | \
|
|
GRF_BIT(8))
|
|
#define RK3288_GMAC_FLOW_CTRL GRF_BIT(9)
|
|
#define RK3288_GMAC_FLOW_CTRL_CLR GRF_CLR_BIT(9)
|
|
#define RK3288_GMAC_SPEED_10M GRF_CLR_BIT(10)
|
|
#define RK3288_GMAC_SPEED_100M GRF_BIT(10)
|
|
#define RK3288_GMAC_RMII_CLK_25M GRF_BIT(11)
|
|
#define RK3288_GMAC_RMII_CLK_2_5M GRF_CLR_BIT(11)
|
|
#define RK3288_GMAC_CLK_125M (GRF_CLR_BIT(12) | GRF_CLR_BIT(13))
|
|
#define RK3288_GMAC_CLK_25M (GRF_BIT(12) | GRF_BIT(13))
|
|
#define RK3288_GMAC_CLK_2_5M (GRF_CLR_BIT(12) | GRF_BIT(13))
|
|
#define RK3288_GMAC_RMII_MODE GRF_BIT(14)
|
|
#define RK3288_GMAC_RMII_MODE_CLR GRF_CLR_BIT(14)
|
|
|
|
/*RK3288_GRF_SOC_CON3*/
|
|
#define RK3288_GMAC_TXCLK_DLY_ENABLE GRF_BIT(14)
|
|
#define RK3288_GMAC_TXCLK_DLY_DISABLE GRF_CLR_BIT(14)
|
|
#define RK3288_GMAC_RXCLK_DLY_ENABLE GRF_BIT(15)
|
|
#define RK3288_GMAC_RXCLK_DLY_DISABLE GRF_CLR_BIT(15)
|
|
#define RK3288_GMAC_CLK_RX_DL_CFG(val) HIWORD_UPDATE(val, 0x7F, 7)
|
|
#define RK3288_GMAC_CLK_TX_DL_CFG(val) HIWORD_UPDATE(val, 0x7F, 0)
|
|
|
|
static void rk3288_set_to_rgmii(struct rk_priv_data *bsp_priv,
|
|
int tx_delay, int rx_delay)
|
|
{
|
|
struct device *dev = &bsp_priv->pdev->dev;
|
|
|
|
if (IS_ERR(bsp_priv->grf)) {
|
|
dev_err(dev, "Missing rockchip,grf property\n");
|
|
return;
|
|
}
|
|
|
|
regmap_write(bsp_priv->grf, RK3288_GRF_SOC_CON1,
|
|
RK3288_GMAC_PHY_INTF_SEL_RGMII |
|
|
RK3288_GMAC_RMII_MODE_CLR);
|
|
regmap_write(bsp_priv->grf, RK3288_GRF_SOC_CON3,
|
|
RK3288_GMAC_RXCLK_DLY_ENABLE |
|
|
RK3288_GMAC_TXCLK_DLY_ENABLE |
|
|
RK3288_GMAC_CLK_RX_DL_CFG(rx_delay) |
|
|
RK3288_GMAC_CLK_TX_DL_CFG(tx_delay));
|
|
}
|
|
|
|
static void rk3288_set_to_rmii(struct rk_priv_data *bsp_priv)
|
|
{
|
|
struct device *dev = &bsp_priv->pdev->dev;
|
|
|
|
if (IS_ERR(bsp_priv->grf)) {
|
|
dev_err(dev, "Missing rockchip,grf property\n");
|
|
return;
|
|
}
|
|
|
|
regmap_write(bsp_priv->grf, RK3288_GRF_SOC_CON1,
|
|
RK3288_GMAC_PHY_INTF_SEL_RMII | RK3288_GMAC_RMII_MODE);
|
|
}
|
|
|
|
static void rk3288_set_rgmii_speed(struct rk_priv_data *bsp_priv, int speed)
|
|
{
|
|
struct device *dev = &bsp_priv->pdev->dev;
|
|
|
|
if (IS_ERR(bsp_priv->grf)) {
|
|
dev_err(dev, "Missing rockchip,grf property\n");
|
|
return;
|
|
}
|
|
|
|
if (speed == 10)
|
|
regmap_write(bsp_priv->grf, RK3288_GRF_SOC_CON1,
|
|
RK3288_GMAC_CLK_2_5M);
|
|
else if (speed == 100)
|
|
regmap_write(bsp_priv->grf, RK3288_GRF_SOC_CON1,
|
|
RK3288_GMAC_CLK_25M);
|
|
else if (speed == 1000)
|
|
regmap_write(bsp_priv->grf, RK3288_GRF_SOC_CON1,
|
|
RK3288_GMAC_CLK_125M);
|
|
else
|
|
dev_err(dev, "unknown speed value for RGMII! speed=%d", speed);
|
|
}
|
|
|
|
static void rk3288_set_rmii_speed(struct rk_priv_data *bsp_priv, int speed)
|
|
{
|
|
struct device *dev = &bsp_priv->pdev->dev;
|
|
|
|
if (IS_ERR(bsp_priv->grf)) {
|
|
dev_err(dev, "Missing rockchip,grf property\n");
|
|
return;
|
|
}
|
|
|
|
if (speed == 10) {
|
|
regmap_write(bsp_priv->grf, RK3288_GRF_SOC_CON1,
|
|
RK3288_GMAC_RMII_CLK_2_5M |
|
|
RK3288_GMAC_SPEED_10M);
|
|
} else if (speed == 100) {
|
|
regmap_write(bsp_priv->grf, RK3288_GRF_SOC_CON1,
|
|
RK3288_GMAC_RMII_CLK_25M |
|
|
RK3288_GMAC_SPEED_100M);
|
|
} else {
|
|
dev_err(dev, "unknown speed value for RMII! speed=%d", speed);
|
|
}
|
|
}
|
|
|
|
struct rk_gmac_ops rk3288_ops = {
|
|
.set_to_rgmii = rk3288_set_to_rgmii,
|
|
.set_to_rmii = rk3288_set_to_rmii,
|
|
.set_rgmii_speed = rk3288_set_rgmii_speed,
|
|
.set_rmii_speed = rk3288_set_rmii_speed,
|
|
};
|
|
|
|
static int gmac_clk_init(struct rk_priv_data *bsp_priv)
|
|
{
|
|
struct device *dev = &bsp_priv->pdev->dev;
|
|
|
|
bsp_priv->clk_enabled = false;
|
|
|
|
bsp_priv->mac_clk_rx = devm_clk_get(dev, "mac_clk_rx");
|
|
if (IS_ERR(bsp_priv->mac_clk_rx))
|
|
dev_err(dev, "cannot get clock %s\n",
|
|
"mac_clk_rx");
|
|
|
|
bsp_priv->mac_clk_tx = devm_clk_get(dev, "mac_clk_tx");
|
|
if (IS_ERR(bsp_priv->mac_clk_tx))
|
|
dev_err(dev, "cannot get clock %s\n",
|
|
"mac_clk_tx");
|
|
|
|
bsp_priv->aclk_mac = devm_clk_get(dev, "aclk_mac");
|
|
if (IS_ERR(bsp_priv->aclk_mac))
|
|
dev_err(dev, "cannot get clock %s\n",
|
|
"aclk_mac");
|
|
|
|
bsp_priv->pclk_mac = devm_clk_get(dev, "pclk_mac");
|
|
if (IS_ERR(bsp_priv->pclk_mac))
|
|
dev_err(dev, "cannot get clock %s\n",
|
|
"pclk_mac");
|
|
|
|
bsp_priv->clk_mac = devm_clk_get(dev, "stmmaceth");
|
|
if (IS_ERR(bsp_priv->clk_mac))
|
|
dev_err(dev, "cannot get clock %s\n",
|
|
"stmmaceth");
|
|
|
|
if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RMII) {
|
|
bsp_priv->clk_mac_ref = devm_clk_get(dev, "clk_mac_ref");
|
|
if (IS_ERR(bsp_priv->clk_mac_ref))
|
|
dev_err(dev, "cannot get clock %s\n",
|
|
"clk_mac_ref");
|
|
|
|
if (!bsp_priv->clock_input) {
|
|
bsp_priv->clk_mac_refout =
|
|
devm_clk_get(dev, "clk_mac_refout");
|
|
if (IS_ERR(bsp_priv->clk_mac_refout))
|
|
dev_err(dev, "cannot get clock %s\n",
|
|
"clk_mac_refout");
|
|
}
|
|
}
|
|
|
|
if (bsp_priv->clock_input) {
|
|
dev_info(dev, "clock input from PHY\n");
|
|
} else {
|
|
if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RMII)
|
|
clk_set_rate(bsp_priv->clk_mac, 50000000);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gmac_clk_enable(struct rk_priv_data *bsp_priv, bool enable)
|
|
{
|
|
int phy_iface = phy_iface = bsp_priv->phy_iface;
|
|
|
|
if (enable) {
|
|
if (!bsp_priv->clk_enabled) {
|
|
if (phy_iface == PHY_INTERFACE_MODE_RMII) {
|
|
if (!IS_ERR(bsp_priv->mac_clk_rx))
|
|
clk_prepare_enable(
|
|
bsp_priv->mac_clk_rx);
|
|
|
|
if (!IS_ERR(bsp_priv->clk_mac_ref))
|
|
clk_prepare_enable(
|
|
bsp_priv->clk_mac_ref);
|
|
|
|
if (!IS_ERR(bsp_priv->clk_mac_refout))
|
|
clk_prepare_enable(
|
|
bsp_priv->clk_mac_refout);
|
|
}
|
|
|
|
if (!IS_ERR(bsp_priv->aclk_mac))
|
|
clk_prepare_enable(bsp_priv->aclk_mac);
|
|
|
|
if (!IS_ERR(bsp_priv->pclk_mac))
|
|
clk_prepare_enable(bsp_priv->pclk_mac);
|
|
|
|
if (!IS_ERR(bsp_priv->mac_clk_tx))
|
|
clk_prepare_enable(bsp_priv->mac_clk_tx);
|
|
|
|
/**
|
|
* if (!IS_ERR(bsp_priv->clk_mac))
|
|
* clk_prepare_enable(bsp_priv->clk_mac);
|
|
*/
|
|
mdelay(5);
|
|
bsp_priv->clk_enabled = true;
|
|
}
|
|
} else {
|
|
if (bsp_priv->clk_enabled) {
|
|
if (phy_iface == PHY_INTERFACE_MODE_RMII) {
|
|
if (!IS_ERR(bsp_priv->mac_clk_rx))
|
|
clk_disable_unprepare(
|
|
bsp_priv->mac_clk_rx);
|
|
|
|
if (!IS_ERR(bsp_priv->clk_mac_ref))
|
|
clk_disable_unprepare(
|
|
bsp_priv->clk_mac_ref);
|
|
|
|
if (!IS_ERR(bsp_priv->clk_mac_refout))
|
|
clk_disable_unprepare(
|
|
bsp_priv->clk_mac_refout);
|
|
}
|
|
|
|
if (!IS_ERR(bsp_priv->aclk_mac))
|
|
clk_disable_unprepare(bsp_priv->aclk_mac);
|
|
|
|
if (!IS_ERR(bsp_priv->pclk_mac))
|
|
clk_disable_unprepare(bsp_priv->pclk_mac);
|
|
|
|
if (!IS_ERR(bsp_priv->mac_clk_tx))
|
|
clk_disable_unprepare(bsp_priv->mac_clk_tx);
|
|
/**
|
|
* if (!IS_ERR(bsp_priv->clk_mac))
|
|
* clk_disable_unprepare(bsp_priv->clk_mac);
|
|
*/
|
|
bsp_priv->clk_enabled = false;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int phy_power_on(struct rk_priv_data *bsp_priv, bool enable)
|
|
{
|
|
struct regulator *ldo = bsp_priv->regulator;
|
|
int ret;
|
|
struct device *dev = &bsp_priv->pdev->dev;
|
|
|
|
if (!ldo) {
|
|
dev_err(dev, "no regulator found\n");
|
|
return -1;
|
|
}
|
|
|
|
if (enable) {
|
|
ret = regulator_enable(ldo);
|
|
if (ret)
|
|
dev_err(dev, "fail to enable phy-supply\n");
|
|
} else {
|
|
ret = regulator_disable(ldo);
|
|
if (ret)
|
|
dev_err(dev, "fail to disable phy-supply\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
|
|
struct rk_gmac_ops *ops)
|
|
{
|
|
struct rk_priv_data *bsp_priv;
|
|
struct device *dev = &pdev->dev;
|
|
int ret;
|
|
const char *strings = NULL;
|
|
int value;
|
|
|
|
bsp_priv = devm_kzalloc(dev, sizeof(*bsp_priv), GFP_KERNEL);
|
|
if (!bsp_priv)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
bsp_priv->phy_iface = of_get_phy_mode(dev->of_node);
|
|
bsp_priv->ops = ops;
|
|
|
|
bsp_priv->regulator = devm_regulator_get_optional(dev, "phy");
|
|
if (IS_ERR(bsp_priv->regulator)) {
|
|
if (PTR_ERR(bsp_priv->regulator) == -EPROBE_DEFER) {
|
|
dev_err(dev, "phy regulator is not available yet, deferred probing\n");
|
|
return ERR_PTR(-EPROBE_DEFER);
|
|
}
|
|
dev_err(dev, "no regulator found\n");
|
|
bsp_priv->regulator = NULL;
|
|
}
|
|
|
|
ret = of_property_read_string(dev->of_node, "clock_in_out", &strings);
|
|
if (ret) {
|
|
dev_err(dev, "Can not read property: clock_in_out.\n");
|
|
bsp_priv->clock_input = true;
|
|
} else {
|
|
dev_info(dev, "clock input or output? (%s).\n",
|
|
strings);
|
|
if (!strcmp(strings, "input"))
|
|
bsp_priv->clock_input = true;
|
|
else
|
|
bsp_priv->clock_input = false;
|
|
}
|
|
|
|
ret = of_property_read_u32(dev->of_node, "tx_delay", &value);
|
|
if (ret) {
|
|
bsp_priv->tx_delay = 0x30;
|
|
dev_err(dev, "Can not read property: tx_delay.");
|
|
dev_err(dev, "set tx_delay to 0x%x\n",
|
|
bsp_priv->tx_delay);
|
|
} else {
|
|
dev_info(dev, "TX delay(0x%x).\n", value);
|
|
bsp_priv->tx_delay = value;
|
|
}
|
|
|
|
ret = of_property_read_u32(dev->of_node, "rx_delay", &value);
|
|
if (ret) {
|
|
bsp_priv->rx_delay = 0x10;
|
|
dev_err(dev, "Can not read property: rx_delay.");
|
|
dev_err(dev, "set rx_delay to 0x%x\n",
|
|
bsp_priv->rx_delay);
|
|
} else {
|
|
dev_info(dev, "RX delay(0x%x).\n", value);
|
|
bsp_priv->rx_delay = value;
|
|
}
|
|
|
|
bsp_priv->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
|
|
"rockchip,grf");
|
|
bsp_priv->pdev = pdev;
|
|
|
|
/*rmii or rgmii*/
|
|
if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RGMII) {
|
|
dev_info(dev, "init for RGMII\n");
|
|
bsp_priv->ops->set_to_rgmii(bsp_priv, bsp_priv->tx_delay,
|
|
bsp_priv->rx_delay);
|
|
} else if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RMII) {
|
|
dev_info(dev, "init for RMII\n");
|
|
bsp_priv->ops->set_to_rmii(bsp_priv);
|
|
} else {
|
|
dev_err(dev, "NO interface defined!\n");
|
|
}
|
|
|
|
gmac_clk_init(bsp_priv);
|
|
|
|
return bsp_priv;
|
|
}
|
|
|
|
static void *rk3288_gmac_setup(struct platform_device *pdev)
|
|
{
|
|
return rk_gmac_setup(pdev, &rk3288_ops);
|
|
}
|
|
|
|
static int rk_gmac_init(struct platform_device *pdev, void *priv)
|
|
{
|
|
struct rk_priv_data *bsp_priv = priv;
|
|
int ret;
|
|
|
|
ret = phy_power_on(bsp_priv, true);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = gmac_clk_enable(bsp_priv, true);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rk_gmac_exit(struct platform_device *pdev, void *priv)
|
|
{
|
|
struct rk_priv_data *gmac = priv;
|
|
|
|
phy_power_on(gmac, false);
|
|
gmac_clk_enable(gmac, false);
|
|
}
|
|
|
|
static void rk_fix_speed(void *priv, unsigned int speed)
|
|
{
|
|
struct rk_priv_data *bsp_priv = priv;
|
|
struct device *dev = &bsp_priv->pdev->dev;
|
|
|
|
if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RGMII)
|
|
bsp_priv->ops->set_rgmii_speed(bsp_priv, speed);
|
|
else if (bsp_priv->phy_iface == PHY_INTERFACE_MODE_RMII)
|
|
bsp_priv->ops->set_rmii_speed(bsp_priv, speed);
|
|
else
|
|
dev_err(dev, "unsupported interface %d", bsp_priv->phy_iface);
|
|
}
|
|
|
|
static const struct stmmac_of_data rk3288_gmac_data = {
|
|
.has_gmac = 1,
|
|
.fix_mac_speed = rk_fix_speed,
|
|
.setup = rk3288_gmac_setup,
|
|
.init = rk_gmac_init,
|
|
.exit = rk_gmac_exit,
|
|
};
|
|
|
|
static const struct of_device_id rk_gmac_dwmac_match[] = {
|
|
{ .compatible = "rockchip,rk3288-gmac", .data = &rk3288_gmac_data},
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, rk_gmac_dwmac_match);
|
|
|
|
static struct platform_driver rk_gmac_dwmac_driver = {
|
|
.probe = stmmac_pltfr_probe,
|
|
.remove = stmmac_pltfr_remove,
|
|
.driver = {
|
|
.name = "rk_gmac-dwmac",
|
|
.pm = &stmmac_pltfr_pm_ops,
|
|
.of_match_table = rk_gmac_dwmac_match,
|
|
},
|
|
};
|
|
module_platform_driver(rk_gmac_dwmac_driver);
|
|
|
|
MODULE_AUTHOR("Chen-Zhi (Roger Chen) <roger.chen@rock-chips.com>");
|
|
MODULE_DESCRIPTION("Rockchip RK3288 DWMAC specific glue layer");
|
|
MODULE_LICENSE("GPL");
|