[PATCH 2/2] net: phy: dp83867: Sync with Linux
Sascha Hauer
s.hauer at pengutronix.de
Wed Sep 20 04:22:52 PDT 2023
This updates the dp83867 phy driver to current Linux-6.5 for easier
future updates.
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
drivers/net/phy/dp83867.c | 528 +++++++++++++++++++++++++++-----------
1 file changed, 377 insertions(+), 151 deletions(-)
diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c
index d818594014..5dc5bac125 100644
--- a/drivers/net/phy/dp83867.c
+++ b/drivers/net/phy/dp83867.c
@@ -1,6 +1,5 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Driver for the Texas Instruments DP83867 PHY
+// SPDX-License-Identifier: GPL-2.0
+/* Driver for the Texas Instruments DP83867 PHY
*
* Copyright (C) 2015 Texas Instruments Inc.
*/
@@ -13,23 +12,43 @@
#include <linux/mdio.h>
#define DP83867_PHY_ID 0x2000a231
-#define DP83867_DEVADDR MDIO_MMD_VEND2
+#define DP83867_DEVADDR 0x1f
#define MII_DP83867_PHYCTRL 0x10
#define MII_DP83867_PHYSTS 0x11
#define MII_DP83867_MICR 0x12
#define MII_DP83867_ISR 0x13
-#define MII_DP83867_CFG2 0x14
-#define MII_DP83867_BISCR 0x16
-#define DP83867_CTRL 0x1f
+#define DP83867_CFG2 0x14
+#define DP83867_LEDCR1 0x18
+#define DP83867_LEDCR2 0x19
#define DP83867_CFG3 0x1e
+#define DP83867_CTRL 0x1f
/* Extended Registers */
+#define DP83867_FLD_THR_CFG 0x002e
#define DP83867_CFG4 0x0031
+#define DP83867_CFG4_SGMII_ANEG_MASK (BIT(5) | BIT(6))
+#define DP83867_CFG4_SGMII_ANEG_TIMER_11MS (3 << 5)
+#define DP83867_CFG4_SGMII_ANEG_TIMER_800US (2 << 5)
+#define DP83867_CFG4_SGMII_ANEG_TIMER_2US (1 << 5)
+#define DP83867_CFG4_SGMII_ANEG_TIMER_16MS (0 << 5)
+
#define DP83867_RGMIICTL 0x0032
#define DP83867_STRAP_STS1 0x006E
+#define DP83867_STRAP_STS2 0x006f
#define DP83867_RGMIIDCTL 0x0086
+#define DP83867_DSP_FFE_CFG 0x012c
+#define DP83867_RXFCFG 0x0134
+#define DP83867_RXFPMD1 0x0136
+#define DP83867_RXFPMD2 0x0137
+#define DP83867_RXFPMD3 0x0138
+#define DP83867_RXFSOP1 0x0139
+#define DP83867_RXFSOP2 0x013A
+#define DP83867_RXFSOP3 0x013B
#define DP83867_IO_MUX_CFG 0x0170
+#define DP83867_SGMIICTL 0x00D3
+#define DP83867_10M_SGMII_CFG 0x016F
+#define DP83867_10M_SGMII_RATE_ADAPT_MASK BIT(7)
#define DP83867_SW_RESET BIT(15)
#define DP83867_SW_RESTART BIT(14)
@@ -52,56 +71,86 @@
#define DP83867_RGMII_TX_CLK_DELAY_EN BIT(1)
#define DP83867_RGMII_RX_CLK_DELAY_EN BIT(0)
+/* SGMIICTL bits */
+#define DP83867_SGMII_TYPE BIT(14)
+
+/* RXFCFG bits*/
+#define DP83867_WOL_MAGIC_EN BIT(0)
+#define DP83867_WOL_BCAST_EN BIT(2)
+#define DP83867_WOL_UCAST_EN BIT(4)
+#define DP83867_WOL_SEC_EN BIT(5)
+#define DP83867_WOL_ENH_MAC BIT(7)
+
/* STRAP_STS1 bits */
#define DP83867_STRAP_STS1_RESERVED BIT(11)
+/* STRAP_STS2 bits */
+#define DP83867_STRAP_STS2_CLK_SKEW_TX_MASK GENMASK(6, 4)
+#define DP83867_STRAP_STS2_CLK_SKEW_TX_SHIFT 4
+#define DP83867_STRAP_STS2_CLK_SKEW_RX_MASK GENMASK(2, 0)
+#define DP83867_STRAP_STS2_CLK_SKEW_RX_SHIFT 0
+#define DP83867_STRAP_STS2_CLK_SKEW_NONE BIT(2)
+#define DP83867_STRAP_STS2_STRAP_FLD BIT(10)
+
/* PHY CTRL bits */
-#define DP83867_PHYCR_FIFO_DEPTH_SHIFT 14
-#define DP83867_PHYCR_FIFO_DEPTH_MASK (3 << 14)
-#define DP83867_MDI_CROSSOVER 5
-#define DP83867_MDI_CROSSOVER_AUTO 0b10
-#define DP83867_MDI_CROSSOVER_MDIX 0b01
-#define DP83867_PHYCTRL_SGMIIEN 0x0800
-#define DP83867_PHYCTRL_RXFIFO_SHIFT 12
-#define DP83867_PHYCTRL_TXFIFO_SHIFT 14
+#define DP83867_PHYCR_TX_FIFO_DEPTH_SHIFT 14
+#define DP83867_PHYCR_RX_FIFO_DEPTH_SHIFT 12
+#define DP83867_PHYCR_FIFO_DEPTH_MAX 0x03
+#define DP83867_PHYCR_TX_FIFO_DEPTH_MASK GENMASK(15, 14)
+#define DP83867_PHYCR_RX_FIFO_DEPTH_MASK GENMASK(13, 12)
#define DP83867_PHYCR_RESERVED_MASK BIT(11)
-
-/* PHY STS bits */
-#define DP83867_PHYSTS_SPEED_1000 BIT(15)
-#define DP83867_PHYSTS_SPEED_100 BIT(14)
-#define DP83867_PHYSTS_DUPLEX_FULL BIT(13)
+#define DP83867_PHYCR_FORCE_LINK_GOOD BIT(10)
/* RGMIIDCTL bits */
+#define DP83867_RGMII_TX_CLK_DELAY_MAX 0xf
#define DP83867_RGMII_TX_CLK_DELAY_SHIFT 4
-
-/* CFG2 bits */
-#define DP83867_DOWNSHIFT_EN (BIT(8) | BIT(9))
-#define DP83867_DOWNSHIFT_ATTEMPT_MASK (BIT(10) | BIT(11))
-#define DP83867_DOWNSHIFT_1_COUNT_VAL 0
-#define DP83867_DOWNSHIFT_2_COUNT_VAL 1
-#define DP83867_DOWNSHIFT_4_COUNT_VAL 2
-#define DP83867_DOWNSHIFT_8_COUNT_VAL 3
-
-/* CFG4 bits */
-#define DP83867_CFG4_SGMII_AUTONEG_TIMER_MASK 0x60
-#define DP83867_CFG4_SGMII_AUTONEG_TIMER_16MS 0x00
-#define DP83867_CFG4_SGMII_AUTONEG_TIMER_2US 0x20
-#define DP83867_CFG4_SGMII_AUTONEG_TIMER_800US 0x40
-#define DP83867_CFG4_SGMII_AUTONEG_TIMER_11MS 0x60
-#define DP83867_CFG4_RESVDBIT7 BIT(7)
-#define DP83867_CFG4_RESVDBIT8 BIT(8)
+#define DP83867_RGMII_TX_CLK_DELAY_INV (DP83867_RGMII_TX_CLK_DELAY_MAX + 1)
+#define DP83867_RGMII_RX_CLK_DELAY_MAX 0xf
+#define DP83867_RGMII_RX_CLK_DELAY_SHIFT 0
+#define DP83867_RGMII_RX_CLK_DELAY_INV (DP83867_RGMII_RX_CLK_DELAY_MAX + 1)
/* IO_MUX_CFG bits */
-#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL 0x1f
-
+#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MASK 0x1f
#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX 0x0
#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN 0x1f
#define DP83867_IO_MUX_CFG_CLK_O_DISABLE BIT(6)
#define DP83867_IO_MUX_CFG_CLK_O_SEL_MASK (0x1f << 8)
#define DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT 8
+/* PHY STS bits */
+#define DP83867_PHYSTS_1000 BIT(15)
+#define DP83867_PHYSTS_100 BIT(14)
+#define DP83867_PHYSTS_DUPLEX BIT(13)
+#define DP83867_PHYSTS_LINK BIT(10)
+
+/* CFG2 bits */
+#define DP83867_DOWNSHIFT_EN (BIT(8) | BIT(9))
+#define DP83867_DOWNSHIFT_ATTEMPT_MASK (BIT(10) | BIT(11))
+#define DP83867_DOWNSHIFT_1_COUNT_VAL 0
+#define DP83867_DOWNSHIFT_2_COUNT_VAL 1
+#define DP83867_DOWNSHIFT_4_COUNT_VAL 2
+#define DP83867_DOWNSHIFT_8_COUNT_VAL 3
+#define DP83867_DOWNSHIFT_1_COUNT 1
+#define DP83867_DOWNSHIFT_2_COUNT 2
+#define DP83867_DOWNSHIFT_4_COUNT 4
+#define DP83867_DOWNSHIFT_8_COUNT 8
+#define DP83867_SGMII_AUTONEG_EN BIT(7)
+
+/* CFG3 bits */
+#define DP83867_CFG3_INT_OE BIT(7)
+#define DP83867_CFG3_ROBUST_AUTO_MDIX BIT(9)
+
/* CFG4 bits */
-#define DP83867_CFG4_PORT_MIRROR_EN BIT(0)
+#define DP83867_CFG4_PORT_MIRROR_EN BIT(0)
+
+/* FLD_THR_CFG */
+#define DP83867_FLD_THR_CFG_ENERGY_LOST_THR_MASK 0x7
+
+#define DP83867_LED_COUNT 4
+
+/* LED_DRV bits */
+#define DP83867_LED_DRV_EN(x) BIT((x) * 4)
+#define DP83867_LED_DRV_VAL(x) BIT((x) * 4 + 1)
enum {
DP83867_PORT_MIRROING_KEEP,
@@ -110,41 +159,41 @@ enum {
};
struct dp83867_private {
- int rx_id_delay;
- int tx_id_delay;
- int fifo_depth;
+ u32 rx_id_delay;
+ u32 tx_id_delay;
+ u32 tx_fifo_depth;
+ u32 rx_fifo_depth;
int io_impedance;
int port_mirroring;
bool rxctrl_strap_quirk;
bool set_clk_output;
u32 clk_output_sel;
+ bool sgmii_ref_clk_en;
};
static int dp83867_read_status(struct phy_device *phydev)
{
- int status;
+ int status = phy_read(phydev, MII_DP83867_PHYSTS);
int ret;
- ret = genphy_update_link(phydev);
+ ret = genphy_read_status(phydev);
if (ret)
return ret;
- status = phy_read(phydev, MII_DP83867_PHYSTS);
if (status < 0)
return status;
- phydev->speed = SPEED_10;
- phydev->duplex = DUPLEX_HALF;
+ if (status & DP83867_PHYSTS_DUPLEX)
+ phydev->duplex = DUPLEX_FULL;
+ else
+ phydev->duplex = DUPLEX_HALF;
- if (status & DP83867_PHYSTS_SPEED_1000)
+ if (status & DP83867_PHYSTS_1000)
phydev->speed = SPEED_1000;
- else if (status & DP83867_PHYSTS_SPEED_100)
+ else if (status & DP83867_PHYSTS_100)
phydev->speed = SPEED_100;
-
- if (status & DP83867_PHYSTS_DUPLEX_FULL)
- phydev->duplex = DUPLEX_FULL;
-
- phydev->pause = phydev->asym_pause = 0;
+ else
+ phydev->speed = SPEED_10;
return 0;
}
@@ -152,16 +201,70 @@ static int dp83867_read_status(struct phy_device *phydev)
static int dp83867_config_port_mirroring(struct phy_device *phydev)
{
struct dp83867_private *dp83867 = phydev->priv;
- u16 val;
-
- val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4);
if (dp83867->port_mirroring == DP83867_PORT_MIRROING_EN)
- val |= DP83867_CFG4_PORT_MIRROR_EN;
+ phy_set_bits_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4,
+ DP83867_CFG4_PORT_MIRROR_EN);
else
- val &= ~DP83867_CFG4_PORT_MIRROR_EN;
+ phy_clear_bits_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4,
+ DP83867_CFG4_PORT_MIRROR_EN);
+ return 0;
+}
- phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4, val);
+static int dp83867_verify_rgmii_cfg(struct phy_device *phydev)
+{
+ struct dp83867_private *dp83867 = phydev->priv;
+
+ /* Existing behavior was to use default pin strapping delay in rgmii
+ * mode, but rgmii should have meant no delay. Warn existing users.
+ */
+ if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
+ const u16 val = phy_read_mmd(phydev, DP83867_DEVADDR,
+ DP83867_STRAP_STS2);
+ const u16 txskew = (val & DP83867_STRAP_STS2_CLK_SKEW_TX_MASK) >>
+ DP83867_STRAP_STS2_CLK_SKEW_TX_SHIFT;
+ const u16 rxskew = (val & DP83867_STRAP_STS2_CLK_SKEW_RX_MASK) >>
+ DP83867_STRAP_STS2_CLK_SKEW_RX_SHIFT;
+
+ if (txskew != DP83867_STRAP_STS2_CLK_SKEW_NONE ||
+ rxskew != DP83867_STRAP_STS2_CLK_SKEW_NONE)
+ phydev_warn(phydev,
+ "PHY has delays via pin strapping, but phy-mode = 'rgmii'\n"
+ "Should be 'rgmii-id' to use internal delays txskew:%x rxskew:%x\n",
+ txskew, rxskew);
+ }
+
+ /* RX delay *must* be specified if internal delay of RX is used. */
+ if ((phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+ phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) &&
+ dp83867->rx_id_delay == DP83867_RGMII_RX_CLK_DELAY_INV) {
+ phydev_err(phydev, "ti,rx-internal-delay must be specified\n");
+ return -EINVAL;
+ }
+
+ /* TX delay *must* be specified if internal delay of TX is used. */
+ if ((phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+ phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) &&
+ dp83867->tx_id_delay == DP83867_RGMII_TX_CLK_DELAY_INV) {
+ phydev_err(phydev, "ti,tx-internal-delay must be specified\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int dp83867_of_init_io_impedance(struct phy_device *phydev)
+{
+ struct dp83867_private *dp83867 = phydev->priv;
+ struct device *dev = &phydev->dev;
+ struct device_node *of_node = dev->of_node;
+
+ if (of_property_read_bool(of_node, "ti,max-output-impedance"))
+ dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX;
+ else if (of_property_read_bool(of_node, "ti,min-output-impedance"))
+ dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN;
+ else
+ dp83867->io_impedance = -1; /* leave at default */
return 0;
}
@@ -176,8 +279,6 @@ static int dp83867_of_init(struct phy_device *phydev)
if (!of_node)
return -ENODEV;
- dp83867->io_impedance = -EINVAL;
-
/* Optional configuration */
ret = of_property_read_u32(of_node, "ti,clk-output-sel",
&dp83867->clk_output_sel);
@@ -189,32 +290,41 @@ static int dp83867_of_init(struct phy_device *phydev)
*/
if (dp83867->clk_output_sel > DP83867_CLK_O_SEL_REF_CLK &&
dp83867->clk_output_sel != DP83867_CLK_O_SEL_OFF) {
- dev_err(&phydev->dev, "ti,clk-output-sel value %u out of range\n",
+ phydev_err(phydev, "ti,clk-output-sel value %u out of range\n",
dp83867->clk_output_sel);
return -EINVAL;
}
}
- if (of_property_read_bool(of_node, "ti,max-output-impedance"))
- dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX;
- else if (of_property_read_bool(of_node, "ti,min-output-impedance"))
- dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN;
+ ret = dp83867_of_init_io_impedance(phydev);
+ if (ret)
+ return ret;
+
+ dp83867->rxctrl_strap_quirk = of_property_read_bool(of_node,
+ "ti,dp83867-rxctrl-strap-quirk");
- dp83867->rxctrl_strap_quirk =
- of_property_read_bool(of_node,
- "ti,dp83867-rxctrl-strap-quirk");
+ dp83867->sgmii_ref_clk_en = of_property_read_bool(of_node,
+ "ti,sgmii-ref-clock-output-enable");
+ dp83867->rx_id_delay = DP83867_RGMII_RX_CLK_DELAY_INV;
ret = of_property_read_u32(of_node, "ti,rx-internal-delay",
&dp83867->rx_id_delay);
- if (ret && (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
- phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID))
- return ret;
+ if (!ret && dp83867->rx_id_delay > DP83867_RGMII_RX_CLK_DELAY_MAX) {
+ phydev_err(phydev,
+ "ti,rx-internal-delay value of %u out of range\n",
+ dp83867->rx_id_delay);
+ return -EINVAL;
+ }
+ dp83867->tx_id_delay = DP83867_RGMII_TX_CLK_DELAY_INV;
ret = of_property_read_u32(of_node, "ti,tx-internal-delay",
&dp83867->tx_id_delay);
- if (ret && (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
- phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID))
- return ret;
+ if (!ret && dp83867->tx_id_delay > DP83867_RGMII_TX_CLK_DELAY_MAX) {
+ phydev_err(phydev,
+ "ti,tx-internal-delay value of %u out of range\n",
+ dp83867->tx_id_delay);
+ return -EINVAL;
+ }
if (of_property_read_bool(of_node, "enet-phy-lane-swap"))
dp83867->port_mirroring = DP83867_PORT_MIRROING_EN;
@@ -222,104 +332,214 @@ static int dp83867_of_init(struct phy_device *phydev)
if (of_property_read_bool(of_node, "enet-phy-lane-no-swap"))
dp83867->port_mirroring = DP83867_PORT_MIRROING_DIS;
- return of_property_read_u32(of_node, "ti,fifo-depth",
- &dp83867->fifo_depth);
+ ret = of_property_read_u32(of_node, "ti,fifo-depth",
+ &dp83867->tx_fifo_depth);
+ if (ret) {
+ ret = of_property_read_u32(of_node, "tx-fifo-depth",
+ &dp83867->tx_fifo_depth);
+ if (ret)
+ dp83867->tx_fifo_depth =
+ DP83867_PHYCR_FIFO_DEPTH_4_B_NIB;
+ }
+
+ if (dp83867->tx_fifo_depth > DP83867_PHYCR_FIFO_DEPTH_MAX) {
+ phydev_err(phydev, "tx-fifo-depth value %u out of range\n",
+ dp83867->tx_fifo_depth);
+ return -EINVAL;
+ }
+
+ ret = of_property_read_u32(of_node, "rx-fifo-depth",
+ &dp83867->rx_fifo_depth);
+ if (ret)
+ dp83867->rx_fifo_depth = DP83867_PHYCR_FIFO_DEPTH_4_B_NIB;
+
+ if (dp83867->rx_fifo_depth > DP83867_PHYCR_FIFO_DEPTH_MAX) {
+ phydev_err(phydev, "rx-fifo-depth value %u out of range\n",
+ dp83867->rx_fifo_depth);
+ return -EINVAL;
+ }
+
+ return 0;
}
-static inline bool phy_interface_is_sgmii(struct phy_device *phydev)
+static int dp83867_probe(struct phy_device *phydev)
{
- return phydev->interface == PHY_INTERFACE_MODE_SGMII ||
- phydev->interface == PHY_INTERFACE_MODE_QSGMII;
+ struct dp83867_private *dp83867;
+
+ dp83867 = xzalloc(sizeof(*dp83867));
+
+ phydev->priv = dp83867;
+
+ return dp83867_of_init(phydev);
}
static int dp83867_config_init(struct phy_device *phydev)
{
- struct dp83867_private *dp83867;
- int ret;
- u16 val, delay;
+ struct dp83867_private *dp83867 = phydev->priv;
+ int ret, val, bs;
+ u16 delay;
+
+ /* Force speed optimization for the PHY even if it strapped */
+ ret = phy_modify(phydev, DP83867_CFG2, DP83867_DOWNSHIFT_EN,
+ DP83867_DOWNSHIFT_EN);
+ if (ret)
+ return ret;
- if (!phydev->priv) {
- dp83867 = kzalloc(sizeof(*dp83867), GFP_KERNEL);
- if (!dp83867)
- return -ENOMEM;
+ ret = dp83867_verify_rgmii_cfg(phydev);
+ if (ret)
+ return ret;
- phydev->priv = dp83867;
- ret = dp83867_of_init(phydev);
+ /* RX_DV/RX_CTRL strapped in mode 1 or mode 2 workaround */
+ if (dp83867->rxctrl_strap_quirk)
+ phy_clear_bits_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4,
+ BIT(7));
+
+ bs = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_STRAP_STS2);
+ if (bs & DP83867_STRAP_STS2_STRAP_FLD) {
+ /* When using strap to enable FLD, the ENERGY_LOST_FLD_THR will
+ * be set to 0x2. This may causes the PHY link to be unstable -
+ * the default value 0x1 need to be restored.
+ */
+ ret = phy_modify_mmd(phydev, DP83867_DEVADDR,
+ DP83867_FLD_THR_CFG,
+ DP83867_FLD_THR_CFG_ENERGY_LOST_THR_MASK,
+ 0x1);
if (ret)
return ret;
- } else {
- dp83867 = phydev->priv;
}
- /* Restart the PHY. */
- val = phy_read(phydev, DP83867_CTRL);
- phy_write(phydev, DP83867_CTRL, val | DP83867_SW_RESTART);
+ if (phy_interface_is_rgmii(phydev) ||
+ phydev->interface == PHY_INTERFACE_MODE_SGMII) {
+ val = phy_read(phydev, MII_DP83867_PHYCTRL);
+ if (val < 0)
+ return val;
+
+ val &= ~DP83867_PHYCR_TX_FIFO_DEPTH_MASK;
+ val |= (dp83867->tx_fifo_depth <<
+ DP83867_PHYCR_TX_FIFO_DEPTH_SHIFT);
- if (dp83867->rxctrl_strap_quirk) {
- val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4);
- val &= ~BIT(7);
- phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4, val);
+ if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
+ val &= ~DP83867_PHYCR_RX_FIFO_DEPTH_MASK;
+ val |= (dp83867->rx_fifo_depth <<
+ DP83867_PHYCR_RX_FIFO_DEPTH_SHIFT);
+ }
+
+ ret = phy_write(phydev, MII_DP83867_PHYCTRL, val);
+ if (ret)
+ return ret;
}
if (phy_interface_is_rgmii(phydev)) {
- val = DP83867_MDI_CROSSOVER_AUTO << DP83867_MDI_CROSSOVER |
- dp83867->fifo_depth << DP83867_PHYCR_FIFO_DEPTH_SHIFT;
+ val = phy_read(phydev, MII_DP83867_PHYCTRL);
+ if (val < 0)
+ return val;
+
+ /* The code below checks if "port mirroring" N/A MODE4 has been
+ * enabled during power on bootstrap.
+ *
+ * Such N/A mode enabled by mistake can put PHY IC in some
+ * internal testing mode and disable RGMII transmission.
+ *
+ * In this particular case one needs to check STRAP_STS1
+ * register's bit 11 (marked as RESERVED).
+ */
+
+ bs = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_STRAP_STS1);
+ if (bs & DP83867_STRAP_STS1_RESERVED)
+ val &= ~DP83867_PHYCR_RESERVED_MASK;
+
ret = phy_write(phydev, MII_DP83867_PHYCTRL, val);
if (ret)
return ret;
+ /* If rgmii mode with no internal delay is selected, we do NOT use
+ * aligned mode as one might expect. Instead we use the PHY's default
+ * based on pin strapping. And the "mode 0" default is to *use*
+ * internal delay with a value of 7 (2.00 ns).
+ *
+ * Set up RGMII delays
+ */
val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL);
- switch (phydev->interface) {
- case PHY_INTERFACE_MODE_RGMII_ID:
- val |= DP83867_RGMII_TX_CLK_DELAY_EN |
- DP83867_RGMII_RX_CLK_DELAY_EN;
- break;
- case PHY_INTERFACE_MODE_RGMII_TXID:
+ val &= ~(DP83867_RGMII_TX_CLK_DELAY_EN | DP83867_RGMII_RX_CLK_DELAY_EN);
+ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
+ val |= (DP83867_RGMII_TX_CLK_DELAY_EN | DP83867_RGMII_RX_CLK_DELAY_EN);
+
+ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
val |= DP83867_RGMII_TX_CLK_DELAY_EN;
- break;
- case PHY_INTERFACE_MODE_RGMII_RXID:
+
+ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
val |= DP83867_RGMII_RX_CLK_DELAY_EN;
- break;
- default:
- break;
- }
- phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL, val);
- delay = (dp83867->rx_id_delay |
- (dp83867->tx_id_delay << DP83867_RGMII_TX_CLK_DELAY_SHIFT));
+ phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL, val);
- phy_write_mmd(phydev, DP83867_DEVADDR,
- DP83867_RGMIIDCTL, delay);
+ delay = 0;
+ if (dp83867->rx_id_delay != DP83867_RGMII_RX_CLK_DELAY_INV)
+ delay |= dp83867->rx_id_delay;
+ if (dp83867->tx_id_delay != DP83867_RGMII_TX_CLK_DELAY_INV)
+ delay |= dp83867->tx_id_delay <<
+ DP83867_RGMII_TX_CLK_DELAY_SHIFT;
- if (dp83867->io_impedance >= 0) {
- val = phy_read_mmd(phydev, DP83867_DEVADDR,
- DP83867_IO_MUX_CFG);
- val &= ~DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL;
- val |= (dp83867->io_impedance &
- DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL);
+ phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIIDCTL,
+ delay);
+ }
- phy_write_mmd(phydev, DP83867_DEVADDR,
- DP83867_IO_MUX_CFG, val);
- }
- } else if (phy_interface_is_sgmii(phydev)) {
- phy_write(phydev, MII_BMCR,
- BMCR_ANENABLE | BMCR_FULLDPLX | BMCR_SPEED1000);
+ /* If specified, set io impedance */
+ if (dp83867->io_impedance >= 0)
+ phy_modify_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG,
+ DP83867_IO_MUX_CFG_IO_IMPEDANCE_MASK,
+ dp83867->io_impedance);
+
+ if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
+ /* For support SPEED_10 in SGMII mode
+ * DP83867_10M_SGMII_RATE_ADAPT bit
+ * has to be cleared by software. That
+ * does not affect SPEED_100 and
+ * SPEED_1000.
+ */
+ ret = phy_modify_mmd(phydev, DP83867_DEVADDR,
+ DP83867_10M_SGMII_CFG,
+ DP83867_10M_SGMII_RATE_ADAPT_MASK,
+ 0);
+ if (ret)
+ return ret;
- phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL, 0x0);
+ /* After reset SGMII Autoneg timer is set to 2us (bits 6 and 5
+ * are 01). That is not enough to finalize autoneg on some
+ * devices. Increase this timer duration to maximum 16ms.
+ */
+ ret = phy_modify_mmd(phydev, DP83867_DEVADDR,
+ DP83867_CFG4,
+ DP83867_CFG4_SGMII_ANEG_MASK,
+ DP83867_CFG4_SGMII_ANEG_TIMER_16MS);
- val = DP83867_PHYCTRL_SGMIIEN |
- DP83867_MDI_CROSSOVER_MDIX << DP83867_MDI_CROSSOVER |
- dp83867->fifo_depth << DP83867_PHYCTRL_RXFIFO_SHIFT |
- dp83867->fifo_depth << DP83867_PHYCTRL_TXFIFO_SHIFT;
+ if (ret)
+ return ret;
- phy_write(phydev, MII_DP83867_PHYCTRL, val);
- phy_write(phydev, MII_DP83867_BISCR, 0x0);
+ val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_SGMIICTL);
+ /* SGMII type is set to 4-wire mode by default.
+ * If we place appropriate property in dts (see above)
+ * switch on 6-wire mode.
+ */
+ if (dp83867->sgmii_ref_clk_en)
+ val |= DP83867_SGMII_TYPE;
+ else
+ val &= ~DP83867_SGMII_TYPE;
+ phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_SGMIICTL, val);
+
+ /* This is a SW workaround for link instability if RX_CTRL is
+ * not strapped to mode 3 or 4 in HW. This is required for SGMII
+ * in addition to clearing bit 7, handled above.
+ */
+ if (dp83867->rxctrl_strap_quirk)
+ phy_set_bits_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4,
+ BIT(8));
}
- val = phy_read(phydev, MII_DP83867_CFG2);
- val |= DP83867_DOWNSHIFT_EN;
- phy_write(phydev, MII_DP83867_CFG2, val);
+ val = phy_read(phydev, DP83867_CFG3);
+
+ val |= DP83867_CFG3_ROBUST_AUTO_MDIX;
+ phy_write(phydev, DP83867_CFG3, val);
if (dp83867->port_mirroring != DP83867_PORT_MIRROING_KEEP)
dp83867_config_port_mirroring(phydev);
@@ -333,11 +553,11 @@ static int dp83867_config_init(struct phy_device *phydev)
} else {
mask |= DP83867_IO_MUX_CFG_CLK_O_SEL_MASK;
val = dp83867->clk_output_sel <<
- DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT;
+ DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT;
}
- phy_modify_mmd(phydev, DP83867_DEVADDR,
- DP83867_IO_MUX_CFG, mask, val);
+ phy_modify_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG,
+ mask, val);
}
return 0;
@@ -345,13 +565,19 @@ static int dp83867_config_init(struct phy_device *phydev)
static struct phy_driver dp83867_driver[] = {
{
- .phy_id = DP83867_PHY_ID,
- .phy_id_mask = 0xfffffff0,
- .drv.name = "TI DP83867",
- .features = PHY_GBIT_FEATURES,
- .config_init = dp83867_config_init,
- .read_status = dp83867_read_status,
+ .phy_id = DP83867_PHY_ID,
+ .phy_id_mask = 0xfffffff0,
+ .drv.name = "TI DP83867",
+ .features = PHY_GBIT_FEATURES,
+
+ .probe = dp83867_probe,
+ .config_init = dp83867_config_init,
+
+ .read_status = dp83867_read_status,
},
};
-
device_phy_drivers(dp83867_driver);
+
+MODULE_DESCRIPTION("Texas Instruments DP83867 PHY driver");
+MODULE_AUTHOR("Dan Murphy <dmurphy at ti.com");
+MODULE_LICENSE("GPL v2");
--
2.39.2
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