[PATCH 1/1] net: ethernet: Add SGMII support to dwmac-socfpga
From: thloh
Date: Fri May 13 2016 - 02:43:08 EST
From: Tien Hock Loh <thloh@xxxxxxxxxx>
Adds SGMII support for dwmac-socfpga to enable the SGMII PHY when phy-mode
of the dwmac is set to sgmii.
Signed-off-by: Tien Hock Loh <thloh@xxxxxxxxxx>
---
.../net/ethernet/stmicro/stmmac/dwmac-socfpga.c | 340 ++++++++++++++++++++-
1 file changed, 330 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 41f4c58..fe826f1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -40,6 +40,44 @@
#define EMAC_SPLITTER_CTRL_SPEED_100 0x3
#define EMAC_SPLITTER_CTRL_SPEED_1000 0x0
+#define TSE_PCS_CONTROL_AN_EN_MASK 0x1000
+#define TSE_PCS_CONTROL_REG 0x00
+#define TSE_PCS_CONTROL_RESTART_AN_MASK 0x0200
+#define TSE_PCS_IF_MODE_REG 0x28
+#define TSE_PCS_LINK_TIMER_0_REG 0x24
+#define TSE_PCS_LINK_TIMER_1_REG 0x26
+#define TSE_PCS_SIZE 0x40
+#define TSE_PCS_STATUS_AN_COMPLETED_MASK 0x0020
+#define TSE_PCS_STATUS_LINK_MASK 0x0004
+#define TSE_PCS_STATUS_REG 0x02
+#define TSE_PCS_SGMII_SPEED_1000 0x8
+#define TSE_PCS_SGMII_SPEED_100 0x4
+#define TSE_PCS_SGMII_SPEED_10 0x0
+#define TSE_PCS_SW_RST_MASK 0x8000
+#define TSE_PCS_PARTNER_ABILITY_REG 0x0A
+#define TSE_PCS_PARTNER_DUPLEX_FULL 0x1000
+#define TSE_PCS_PARTNER_DUPLEX_HALF 0x0000
+#define TSE_PCS_PARTNER_DUPLEX_MASK 0x1000
+#define TSE_PCS_PARTNER_SPEED_MASK 0x0c00
+#define TSE_PCS_PARTNER_SPEED_1000 0x0800
+#define TSE_PCS_PARTNER_SPEED_100 0x0400
+#define TSE_PCS_PARTNER_SPEED_10 0x0000
+#define TSE_PCS_PARTNER_SPEED_1000 0x0800
+#define TSE_PCS_PARTNER_SPEED_100 0x0400
+#define TSE_PCS_PARTNER_SPEED_10 0x0000
+#define TSE_PCS_SGMII_SPEED_MASK 0x000C
+#define TSE_PCS_SGMII_LINK_TIMER_0 0x0D40
+#define TSE_PCS_SGMII_LINK_TIMER_1 0x0003
+#define TSE_PCS_SW_RESET_TIMEOUT 100
+#define TSE_PCS_USE_SGMII_AN_MASK 0x0002
+
+#define SGMII_ADAPTER_CTRL_REG 0x00
+#define SGMII_ADAPTER_DISABLE 0x0001
+#define SGMII_ADAPTER_ENABLE 0x0000
+#define LINK_TIMER 20
+#define AUTONEGO_TIMER 20
+
+thloh
struct socfpga_dwmac {
int interface;
u32 reg_offset;
@@ -49,18 +87,17 @@ struct socfpga_dwmac {
struct reset_control *stmmac_rst;
void __iomem *splitter_base;
bool f2h_ptp_ref_clk;
+ void __iomem *tse_pcs_base;
+ void __iomem *sgmii_adapter_base;
+ struct timer_list an_timer;
+ struct timer_list link_timer;
};
-static void socfpga_dwmac_fix_mac_speed(void *priv, unsigned int speed)
+static void config_emac_splitter_speed(void __iomem *base, unsigned int speed)
{
- struct socfpga_dwmac *dwmac = (struct socfpga_dwmac *)priv;
- void __iomem *splitter_base = dwmac->splitter_base;
u32 val;
- if (!splitter_base)
- return;
-
- val = readl(splitter_base + EMAC_SPLITTER_CTRL_REG);
+ val = readl(base + EMAC_SPLITTER_CTRL_REG);
val &= ~EMAC_SPLITTER_CTRL_SPEED_MASK;
switch (speed) {
@@ -76,8 +113,214 @@ static void socfpga_dwmac_fix_mac_speed(void *priv, unsigned int speed)
default:
return;
}
+ writel(val, base + EMAC_SPLITTER_CTRL_REG);
+}
+
+static void config_tx_buffer(u16 data, void __iomem *base)
+{
+ writew(data, base + SGMII_ADAPTER_CTRL_REG);
+}
+
+static void tse_pcs_reset(void __iomem *base, struct socfpga_dwmac *dwmac)
+{
+ int counter = 0;
+ u16 val;
+
+ val = readw(base + TSE_PCS_CONTROL_REG);
+ val |= TSE_PCS_SW_RST_MASK;
+ writew(val, base + TSE_PCS_CONTROL_REG);
+
+ while (counter < TSE_PCS_SW_RESET_TIMEOUT) {
+ val = readw(base + TSE_PCS_CONTROL_REG);
+ val &= TSE_PCS_SW_RST_MASK;
+ if (val == 0)
+ break;
+ counter++;
+ udelay(1);
+ }
+ if (counter >= TSE_PCS_SW_RESET_TIMEOUT)
+ dev_err(dwmac->dev, "PCS could not get out of sw reset\n");
+}
+
+static void tse_pcs_init(void __iomem *base, struct socfpga_dwmac *dwmac)
+{
+ writew(0x0001, base + TSE_PCS_IF_MODE_REG);
+
+ writew(TSE_PCS_SGMII_LINK_TIMER_0, base + TSE_PCS_LINK_TIMER_0_REG);
+ writew(TSE_PCS_SGMII_LINK_TIMER_1, base + TSE_PCS_LINK_TIMER_1_REG);
+
+ tse_pcs_reset(base, dwmac);
+}
- writel(val, splitter_base + EMAC_SPLITTER_CTRL_REG);
+static void pcs_link_timer_callback(unsigned long data)
+{
+ u16 val = 0;
+
+ struct socfpga_dwmac *dwmac = (struct socfpga_dwmac *)data;
+ void __iomem *tse_pcs_base = dwmac->tse_pcs_base;
+ void __iomem *sgmii_adapter_base = dwmac->sgmii_adapter_base;
+
+ val = readw(tse_pcs_base + TSE_PCS_STATUS_REG);
+ val &= TSE_PCS_STATUS_LINK_MASK;
+
+ if (val != 0) {
+ dev_dbg(dwmac->dev, "Adapter: Link is established\n");
+ config_tx_buffer(SGMII_ADAPTER_ENABLE, sgmii_adapter_base);
+ } else {
+ mod_timer(&dwmac->link_timer, jiffies +
+ msecs_to_jiffies(LINK_TIMER));
+ }
+}
+
+static void auto_nego_timer_callback(unsigned long data)
+{
+ u16 val = 0;
+ u16 speed = 0;
+ u16 duplex = 0;
+
+ struct socfpga_dwmac *dwmac = (struct socfpga_dwmac *)data;
+ void __iomem *tse_pcs_base = dwmac->tse_pcs_base;
+ void __iomem *sgmii_adapter_base = dwmac->sgmii_adapter_base;
+
+ val = readw(tse_pcs_base + TSE_PCS_STATUS_REG);
+ val &= TSE_PCS_STATUS_AN_COMPLETED_MASK;
+
+ if (val != 0) {
+ dev_dbg(dwmac->dev, "Adapter: Auto Negotiation is completed\n");
+ val = readw(tse_pcs_base + TSE_PCS_PARTNER_ABILITY_REG);
+ speed = val & TSE_PCS_PARTNER_SPEED_MASK;
+ duplex = val & TSE_PCS_PARTNER_DUPLEX_MASK;
+
+ if (speed == TSE_PCS_PARTNER_SPEED_10 &&
+ duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
+ dev_dbg(dwmac->dev,
+ "Adapter: Link Partner is Up - 10/Full\n");
+ else if (speed == TSE_PCS_PARTNER_SPEED_100 &&
+ duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
+ dev_dbg(dwmac->dev,
+ "Adapter: Link Partner is Up - 100/Full\n");
+ else if (speed == TSE_PCS_PARTNER_SPEED_1000 &&
+ duplex == TSE_PCS_PARTNER_DUPLEX_FULL)
+ dev_dbg(dwmac->dev,
+ "Adapter: Link Partner is Up - 1000/Full\n");
+ else if (speed == TSE_PCS_PARTNER_SPEED_10 &&
+ duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
+ dev_err(dwmac->dev,
+ "Adapter does not support Half Duplex\n");
+ else if (speed == TSE_PCS_PARTNER_SPEED_100 &&
+ duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
+ dev_err(dwmac->dev,
+ "Adapter does not support Half Duplex\n");
+ else if (speed == TSE_PCS_PARTNER_SPEED_1000 &&
+ duplex == TSE_PCS_PARTNER_DUPLEX_HALF)
+ dev_err(dwmac->dev,
+ "Adapter does not support Half Duplex\n");
+ else
+ dev_err(dwmac->dev,
+ "Adapter: Invalid Partner Speed and Duplex\n");
+
+ config_tx_buffer(SGMII_ADAPTER_ENABLE, sgmii_adapter_base);
+ } else {
+ val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
+ val |= TSE_PCS_CONTROL_RESTART_AN_MASK;
+ writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);
+
+ tse_pcs_reset(tse_pcs_base, dwmac);
+ mod_timer(&dwmac->an_timer, jiffies +
+ msecs_to_jiffies(AUTONEGO_TIMER));
+ }
+}
+
+static void socfpga_dwmac_fix_mac_speed(void *priv, unsigned int speed)
+{
+ struct socfpga_dwmac *dwmac = (struct socfpga_dwmac *)priv;
+ void __iomem *splitter_base = dwmac->splitter_base;
+ void __iomem *tse_pcs_base = dwmac->tse_pcs_base;
+ void __iomem *sgmii_adapter_base = dwmac->sgmii_adapter_base;
+ struct device *dev = dwmac->dev;
+ struct net_device *ndev = dev_get_drvdata(dev);
+ struct phy_device *phy_dev = ndev->phydev;
+ u32 val;
+
+ if ((tse_pcs_base) && (sgmii_adapter_base)) {
+ config_tx_buffer(SGMII_ADAPTER_DISABLE, sgmii_adapter_base);
+ if (splitter_base)
+ config_emac_splitter_speed(splitter_base, speed);
+
+ if (phy_dev->autoneg == AUTONEG_ENABLE) {
+ val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
+ val |= TSE_PCS_CONTROL_AN_EN_MASK;
+ writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);
+
+ val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
+ val |= TSE_PCS_USE_SGMII_AN_MASK;
+ writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);
+
+ val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
+ val |= TSE_PCS_CONTROL_RESTART_AN_MASK;
+ writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);
+
+ tse_pcs_reset(tse_pcs_base, dwmac);
+
+ setup_timer(&dwmac->an_timer,
+ auto_nego_timer_callback,
+ (unsigned long)dwmac);
+ mod_timer(&dwmac->an_timer, jiffies +
+ msecs_to_jiffies(AUTONEGO_TIMER));
+ } else if (phy_dev->autoneg == AUTONEG_DISABLE) {
+ val = readw(tse_pcs_base + TSE_PCS_CONTROL_REG);
+ val &= ~TSE_PCS_CONTROL_AN_EN_MASK;
+ writew(val, tse_pcs_base + TSE_PCS_CONTROL_REG);
+
+ val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
+ val &= ~TSE_PCS_USE_SGMII_AN_MASK;
+ writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);
+
+ val = readw(tse_pcs_base + TSE_PCS_IF_MODE_REG);
+ val &= ~TSE_PCS_SGMII_SPEED_MASK;
+
+ switch (speed) {
+ case 1000:
+ val |= TSE_PCS_SGMII_SPEED_1000;
+ break;
+ case 100:
+ val |= TSE_PCS_SGMII_SPEED_100;
+ break;
+ case 10:
+ val |= TSE_PCS_SGMII_SPEED_10;
+ break;
+ default:
+ return;
+ }
+ writew(val, tse_pcs_base + TSE_PCS_IF_MODE_REG);
+
+ tse_pcs_reset(tse_pcs_base, dwmac);
+
+ setup_timer(&dwmac->link_timer,
+ pcs_link_timer_callback,
+ (unsigned long)dwmac);
+ mod_timer(&dwmac->link_timer, jiffies +
+ msecs_to_jiffies(LINK_TIMER));
+ }
+ } else if (splitter_base) {
+ val = readl(splitter_base + EMAC_SPLITTER_CTRL_REG);
+ val &= ~EMAC_SPLITTER_CTRL_SPEED_MASK;
+
+ switch (speed) {
+ case 1000:
+ val |= EMAC_SPLITTER_CTRL_SPEED_1000;
+ break;
+ case 100:
+ val |= EMAC_SPLITTER_CTRL_SPEED_100;
+ break;
+ case 10:
+ val |= EMAC_SPLITTER_CTRL_SPEED_10;
+ break;
+ default:
+ return;
+ }
+ writel(val, splitter_base + EMAC_SPLITTER_CTRL_REG);
+ }
}
static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *dev)
@@ -85,9 +328,13 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
struct device_node *np = dev->of_node;
struct regmap *sys_mgr_base_addr;
u32 reg_offset, reg_shift;
- int ret;
- struct device_node *np_splitter;
+ int ret, index;
+ struct device_node *np_splitter = NULL;
+ struct device_node *np_sgmii_adapter = NULL;
+
struct resource res_splitter;
+ struct resource res_tse_pcs;
+ struct resource res_sgmii_adapter;
dwmac->stmmac_rst = devm_reset_control_get(dev,
STMMAC_RESOURCE_NAME);
@@ -134,6 +381,72 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
}
}
+ np_sgmii_adapter = of_parse_phandle(np,
+ "altr,gmii_to_sgmii_converter", 0);
+ if (np_sgmii_adapter) {
+ index = of_property_match_string(np_sgmii_adapter, "reg-names",
+ "hps_emac_interface_splitter_avalon_slave");
+
+ if (index >= 0) {
+ if (of_address_to_resource(np_sgmii_adapter, index,
+ &res_splitter)) {
+ dev_err(dev, "%s: ERROR: missing emac splitter "
+ "address\n", __func__);
+ return -EINVAL;
+ }
+
+ dwmac->splitter_base = devm_ioremap_resource(
+ dev, &res_splitter);
+
+ if (IS_ERR(dwmac->splitter_base)) {
+ dev_err(dev, "%s: ERROR: failed to mapping emac"
+ " splitter\n", __func__);
+ return PTR_ERR(dwmac->splitter_base);
+ }
+ }
+
+ index = of_property_match_string(np_sgmii_adapter, "reg-names",
+ "gmii_to_sgmii_adapter_avalon_slave");
+
+ if (index >= 0) {
+ if (of_address_to_resource(np_sgmii_adapter, index,
+ &res_sgmii_adapter)) {
+ dev_err(dev, "%s: ERROR: failed to mapping adapter\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ dwmac->sgmii_adapter_base = devm_ioremap_resource(
+ dev, &res_sgmii_adapter);
+
+ if (IS_ERR(dwmac->sgmii_adapter_base)) {
+ dev_err(dev, "%s: failed to mapping adapter\n",
+ __func__);
+ return PTR_ERR(dwmac->sgmii_adapter_base);
+ }
+ }
+
+ index = of_property_match_string(np_sgmii_adapter, "reg-names",
+ "eth_tse_control_port");
+
+ if (index >= 0) {
+ if (of_address_to_resource(np_sgmii_adapter, index,
+ &res_tse_pcs)) {
+ dev_err(dev, "%s: ERROR: failed mapping tse control port\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ dwmac->tse_pcs_base = devm_ioremap_resource(
+ dev, &res_tse_pcs);
+
+ if (IS_ERR(dwmac->tse_pcs_base)) {
+ dev_err(dev, "%s: failed to mapping tse control port\n",
+ __func__);
+ return PTR_ERR(dwmac->sgmii_adapter_base);
+ }
+ }
+ }
dwmac->reg_offset = reg_offset;
dwmac->reg_shift = reg_shift;
dwmac->sys_mgr_base_addr = sys_mgr_base_addr;
@@ -157,6 +470,7 @@ static int socfpga_dwmac_setup(struct socfpga_dwmac *dwmac)
break;
case PHY_INTERFACE_MODE_MII:
case PHY_INTERFACE_MODE_GMII:
+ case PHY_INTERFACE_MODE_SGMII:
val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
break;
default:
@@ -181,6 +495,12 @@ static int socfpga_dwmac_setup(struct socfpga_dwmac *dwmac)
ctrl &= ~(SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK << (reg_shift / 2));
regmap_write(sys_mgr_base_addr, reg_offset, ctrl);
+
+ if (phymode == PHY_INTERFACE_MODE_SGMII) {
+ tse_pcs_init(dwmac->tse_pcs_base, dwmac);
+ config_tx_buffer(SGMII_ADAPTER_ENABLE,
+ dwmac->sgmii_adapter_base);
+ }
return 0;
}
--
1.7.11.GIT