[PATCH net-next 0/6] Add support for LAN937x T1 Phy Driver

[PATCH net-next 0/6] Add support for LAN937x T1 Phy Driver

[Arun Ramadoss]

LAN937x is a Multi-port 100Base-T1 Switch and it internally uses LAN87xx
T1 Phy.  This series of patch update the initialization routine for the
LAN87xx phy and also add LAN937x part support. Added the T1 Phy
master-slave configuration through ethtool.

Arun Ramadoss (6):
  net: phy: used genphy_soft_reset for phy reset in LAN87xx
  net: phy: used the PHY_ID_MATCH_MODEL macro for LAN87XX
  net: phy: removed empty lines in LAN87XX
  net: phy: updated the initialization routine for LAN87xx
  net: phy: added the LAN937x phy support
  net: phy: added ethtool master-slave configuration support

 drivers/net/phy/microchip_t1.c | 387 +++++++++++++++++++++++++++------
 1 file changed, 325 insertions(+), 62 deletions(-)


base-commit: f9f52c3474282a5485b28cf188b47d6e2efee185
-- 
2.33.0

[PATCH net-next 1/6] net: phy: used genphy_soft_reset for phy reset in LAN87xx

[Arun Ramadoss]

Replaced the current code of resetting of LAN87xx phy to
genphy_soft_reset library function.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
---
 drivers/net/phy/microchip_t1.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/drivers/net/phy/microchip_t1.c b/drivers/net/phy/microchip_t1.c
index bc50224d43dd..c6a8c22efcce 100644
--- a/drivers/net/phy/microchip_t1.c
+++ b/drivers/net/phy/microchip_t1.c
@@ -197,20 +197,10 @@ static int lan87xx_phy_init(struct phy_device *phydev)
 	if (rc < 0)
 		return rc;
 
-	/* Soft Reset the SMI block */
-	rc = access_ereg_modify_changed(phydev, PHYACC_ATTR_BANK_SMI,
-					0x00, 0x8000, 0x8000);
-	if (rc < 0)
-		return rc;
-
-	/* Check to see if the self-clearing bit is cleared */
-	usleep_range(1000, 2000);
-	rc = access_ereg(phydev, PHYACC_ATTR_MODE_READ,
-			 PHYACC_ATTR_BANK_SMI, 0x00, 0);
+	/* phy Soft reset */
+	rc = genphy_soft_reset(phydev);
 	if (rc < 0)
 		return rc;
-	if ((rc & 0x8000) != 0)
-		return -ETIMEDOUT;
 
 	/* PHY Initialization */
 	for (i = 0; i < ARRAY_SIZE(init); i++) {
-- 
2.33.0

[PATCH net-next 2/6] net: phy: used the PHY_ID_MATCH_MODEL macro for LAN87XX

[Arun Ramadoss]

Used the PHY_ID_MATCH_MODEL MACRO for describing the phy_id and
phy_id_mask.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
---
 drivers/net/phy/microchip_t1.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/phy/microchip_t1.c b/drivers/net/phy/microchip_t1.c
index c6a8c22efcce..e4801d5ea793 100644
--- a/drivers/net/phy/microchip_t1.c
+++ b/drivers/net/phy/microchip_t1.c
@@ -9,6 +9,8 @@
 #include <linux/ethtool.h>
 #include <linux/ethtool_netlink.h>
 
+#define PHY_ID_LAN87XX				0x0007c150
+
 /* External Register Control Register */
 #define LAN87XX_EXT_REG_CTL                     (0x14)
 #define LAN87XX_EXT_REG_CTL_RD_CTL              (0x1000)
@@ -496,8 +498,7 @@ static int lan87xx_cable_test_get_status(struct phy_device *phydev,
 
 static struct phy_driver microchip_t1_phy_driver[] = {
 	{
-		.phy_id         = 0x0007c150,
-		.phy_id_mask    = 0xfffffff0,
+		PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX),
 		.name           = "Microchip LAN87xx T1",
 		.flags          = PHY_POLL_CABLE_TEST,
 
@@ -518,7 +519,7 @@ static struct phy_driver microchip_t1_phy_driver[] = {
 module_phy_driver(microchip_t1_phy_driver);
 
 static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = {
-	{ 0x0007c150, 0xfffffff0 },
+	{ PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX) },
 	{ }
 };
 
-- 
2.33.0

[PATCH net-next 3/6] net: phy: removed empty lines in LAN87XX

[Arun Ramadoss]

Removed the empty lines in struct phy_drivers.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
---
 drivers/net/phy/microchip_t1.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/phy/microchip_t1.c b/drivers/net/phy/microchip_t1.c
index e4801d5ea793..f247892902f7 100644
--- a/drivers/net/phy/microchip_t1.c
+++ b/drivers/net/phy/microchip_t1.c
@@ -501,14 +501,10 @@ static struct phy_driver microchip_t1_phy_driver[] = {
 		PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX),
 		.name           = "Microchip LAN87xx T1",
 		.flags          = PHY_POLL_CABLE_TEST,
-
 		.features       = PHY_BASIC_T1_FEATURES,
-
 		.config_init	= lan87xx_config_init,
-
 		.config_intr    = lan87xx_phy_config_intr,
 		.handle_interrupt = lan87xx_handle_interrupt,
-
 		.suspend        = genphy_suspend,
 		.resume         = genphy_resume,
 		.cable_test_start = lan87xx_cable_test_start,
-- 
2.33.0

[PATCH net-next 4/6] net: phy: updated the initialization routine for LAN87xx

[Arun Ramadoss]

The new initialization sequence is the improvement to the existing init
routine. Init routine does soft reset, run init script and set
Hw_init. Added the new access_smi_poll_timeout() for polling smi
bank write.

Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
---
 drivers/net/phy/microchip_t1.c | 217 ++++++++++++++++++++++++++-------
 1 file changed, 175 insertions(+), 42 deletions(-)

diff --git a/drivers/net/phy/microchip_t1.c b/drivers/net/phy/microchip_t1.c
index f247892902f7..d0bc0125f3ef 100644
--- a/drivers/net/phy/microchip_t1.c
+++ b/drivers/net/phy/microchip_t1.c
@@ -39,6 +39,7 @@
 #define	PHYACC_ATTR_MODE_READ		0
 #define	PHYACC_ATTR_MODE_WRITE		1
 #define	PHYACC_ATTR_MODE_MODIFY		2
+#define	PHYACC_ATTR_MODE_POLL		3
 
 #define	PHYACC_ATTR_BANK_SMI		0
 #define	PHYACC_ATTR_BANK_MISC		1
@@ -52,6 +53,28 @@
 #define	LAN87XX_CABLE_TEST_OPEN	1
 #define	LAN87XX_CABLE_TEST_SAME_SHORT	2
 
+/* T1 Registers */
+#define T1_AFE_PORT_CFG1_REG		0x0B
+#define T1_POWER_DOWN_CONTROL_REG	0x1A
+#define T1_SLV_FD_MULT_CFG_REG		0x18
+#define T1_CDR_CFG_PRE_LOCK_REG		0x05
+#define T1_CDR_CFG_POST_LOCK_REG	0x06
+#define T1_LCK_STG2_MUFACT_CFG_REG	0x1A
+#define T1_LCK_STG3_MUFACT_CFG_REG	0x1B
+#define T1_POST_LCK_MUFACT_CFG_REG	0x1C
+#define T1_TX_RX_FIFO_CFG_REG		0x02
+#define T1_TX_LPF_FIR_CFG_REG		0x55
+#define T1_SQI_CONFIG_REG		0x2E
+#define T1_MDIO_CONTROL2_REG		0x10
+#define T1_INTERRUPT_SOURCE_REG		0x18
+#define T1_INTERRUPT2_SOURCE_REG	0x08
+#define T1_EQ_FD_STG1_FRZ_CFG		0x69
+#define T1_EQ_FD_STG2_FRZ_CFG		0x6A
+#define T1_EQ_FD_STG3_FRZ_CFG		0x6B
+#define T1_EQ_FD_STG4_FRZ_CFG		0x6C
+#define T1_EQ_WT_FD_LCK_FRZ_CFG		0x6D
+#define T1_PST_EQ_LCK_STG1_FRZ_CFG	0x6E
+
 #define DRIVER_AUTHOR	"Nisar Sayed <nisar.sayed@microchip.com>"
 #define DRIVER_DESC	"Microchip LAN87XX T1 PHY driver"
 
@@ -119,6 +142,15 @@ static int access_ereg_modify_changed(struct phy_device *phydev,
 	return rc;
 }
 
+static int access_smi_poll_timeout(struct phy_device *phydev,
+				   u8 offset, u16 mask, u16 clr)
+{
+	int val;
+
+	return phy_read_poll_timeout(phydev, offset, val, (val & mask) == clr,
+				     150, 30000, true);
+}
+
 static int lan87xx_config_rgmii_delay(struct phy_device *phydev)
 {
 	int rc;
@@ -159,46 +191,146 @@ static int lan87xx_config_rgmii_delay(struct phy_device *phydev)
 static int lan87xx_phy_init(struct phy_device *phydev)
 {
 	static const struct access_ereg_val init[] = {
-		/* TX Amplitude = 5 */
-		{PHYACC_ATTR_MODE_MODIFY, PHYACC_ATTR_BANK_AFE, 0x0B,
-		 0x000A, 0x001E},
-		/* Clear SMI interrupts */
-		{PHYACC_ATTR_MODE_READ, PHYACC_ATTR_BANK_SMI, 0x18,
-		 0, 0},
-		/* Clear MISC interrupts */
-		{PHYACC_ATTR_MODE_READ, PHYACC_ATTR_BANK_MISC, 0x08,
-		 0, 0},
-		/* Turn on TC10 Ring Oscillator (ROSC) */
-		{PHYACC_ATTR_MODE_MODIFY, PHYACC_ATTR_BANK_MISC, 0x20,
-		 0x0020, 0x0020},
-		/* WUR Detect Length to 1.2uS, LPC Detect Length to 1.09uS */
-		{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_PCS, 0x20,
-		 0x283C, 0},
-		/* Wake_In Debounce Length to 39uS, Wake_Out Length to 79uS */
-		{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_MISC, 0x21,
-		 0x274F, 0},
-		/* Enable Auto Wake Forward to Wake_Out, ROSC on, Sleep,
-		 * and Wake_In to wake PHY
-		 */
-		{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_MISC, 0x20,
-		 0x80A7, 0},
-		/* Enable WUP Auto Fwd, Enable Wake on MDI, Wakeup Debouncer
-		 * to 128 uS
-		 */
-		{PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_MISC, 0x24,
-		 0xF110, 0},
-		/* Enable HW Init */
-		{PHYACC_ATTR_MODE_MODIFY, PHYACC_ATTR_BANK_SMI, 0x1A,
-		 0x0100, 0x0100},
+		/* TXPD/TXAMP6 Configs */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_AFE,
+		  T1_AFE_PORT_CFG1_REG,       0x002D,  0 },
+		/* HW_Init Hi and Force_ED */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_SMI,
+		  T1_POWER_DOWN_CONTROL_REG,  0x0308,  0 },
+		/* Equalizer Full Duplex Freeze - T1 Slave */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_EQ_FD_STG1_FRZ_CFG,     0x0002,  0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_EQ_FD_STG2_FRZ_CFG,     0x0002,  0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_EQ_FD_STG3_FRZ_CFG,     0x0002,  0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_EQ_FD_STG4_FRZ_CFG,     0x0002,  0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_EQ_WT_FD_LCK_FRZ_CFG,    0x0002,  0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_PST_EQ_LCK_STG1_FRZ_CFG, 0x0002,  0 },
+		/* Slave Full Duplex Multi Configs */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_SLV_FD_MULT_CFG_REG,     0x0D53,  0 },
+		/* CDR Pre and Post Lock Configs */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_CDR_CFG_PRE_LOCK_REG,    0x0AB2,  0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_CDR_CFG_POST_LOCK_REG,   0x0AB3,  0 },
+		/* Lock Stage 2-3 Multi Factor Config */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_LCK_STG2_MUFACT_CFG_REG, 0x0AEA,  0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_LCK_STG3_MUFACT_CFG_REG, 0x0AEB,  0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_POST_LCK_MUFACT_CFG_REG, 0x0AEB,  0 },
+		/* Pointer delay */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_RX_FIFO_CFG_REG, 0x1C00, 0 },
+		/* Tx iir edits */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1000, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1861, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1061, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1922, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1122, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1983, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1183, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1944, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1144, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x18c5, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x10c5, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1846, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1046, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1807, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1007, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1808, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1008, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1809, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1009, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x180A, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x100A, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x180B, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x100B, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x180C, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x100C, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x180D, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x100D, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x180E, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x100E, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x180F, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x100F, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1810, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1010, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1811, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1011, 0 },
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_TX_LPF_FIR_CFG_REG, 0x1000, 0 },
+		/* SQI enable */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_DSP,
+		  T1_SQI_CONFIG_REG,		0x9572, 0 },
+		/* Flag LPS and WUR as idle errors */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_SMI,
+		  T1_MDIO_CONTROL2_REG,		0x0014, 0 },
+		/* HW_Init toggle, undo force ED, TXPD off */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_SMI,
+		  T1_POWER_DOWN_CONTROL_REG,	0x0200, 0 },
+		/* Reset PCS to trigger hardware initialization */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_SMI,
+		  T1_MDIO_CONTROL2_REG,		0x0094, 0 },
+		/* Poll till Hardware is initialized */
+		{ PHYACC_ATTR_MODE_POLL, PHYACC_ATTR_BANK_SMI,
+		  T1_MDIO_CONTROL2_REG,		0x0080, 0 },
+		/* Tx AMP - 0x06  */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_AFE,
+		  T1_AFE_PORT_CFG1_REG,		0x000C, 0 },
+		/* Read INTERRUPT_SOURCE Register */
+		{ PHYACC_ATTR_MODE_READ, PHYACC_ATTR_BANK_SMI,
+		  T1_INTERRUPT_SOURCE_REG,	0,	0 },
+		/* Read INTERRUPT_SOURCE Register */
+		{ PHYACC_ATTR_MODE_READ, PHYACC_ATTR_BANK_MISC,
+		  T1_INTERRUPT2_SOURCE_REG,	0,	0 },
+		/* HW_Init Hi */
+		{ PHYACC_ATTR_MODE_WRITE, PHYACC_ATTR_BANK_SMI,
+		  T1_POWER_DOWN_CONTROL_REG,	0x0300, 0 },
 	};
 	int rc, i;
 
-	/* Start manual initialization procedures in Managed Mode */
-	rc = access_ereg_modify_changed(phydev, PHYACC_ATTR_BANK_SMI,
-					0x1a, 0x0000, 0x0100);
-	if (rc < 0)
-		return rc;
-
 	/* phy Soft reset */
 	rc = genphy_soft_reset(phydev);
 	if (rc < 0)
@@ -206,11 +338,12 @@ static int lan87xx_phy_init(struct phy_device *phydev)
 
 	/* PHY Initialization */
 	for (i = 0; i < ARRAY_SIZE(init); i++) {
-		if (init[i].mode == PHYACC_ATTR_MODE_MODIFY) {
-			rc = access_ereg_modify_changed(phydev, init[i].bank,
-							init[i].offset,
-							init[i].val,
-							init[i].mask);
+		if (init[i].mode == PHYACC_ATTR_MODE_POLL &&
+		    init[i].bank == PHYACC_ATTR_BANK_SMI) {
+			rc = access_smi_poll_timeout(phydev,
+						     init[i].offset,
+						     init[i].val,
+						     init[i].mask);
 		} else {
 			rc = access_ereg(phydev, init[i].mode, init[i].bank,
 					 init[i].offset, init[i].val);
-- 
2.33.0

[PATCH net-next 5/6] net: phy: added the LAN937x phy support

[Arun Ramadoss]

LAN937x T1 switch is based on LAN87xx Phy, so reusing the init script of
the LAN87xx. There is a workaround in accessing the DSP bank register
for LAN937x Phy. Whenever there is a bank switch to DSP registers, then
we need a one dummy read access before proceeding to the actual register
access.

Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
---
 drivers/net/phy/microchip_t1.c | 55 +++++++++++++++++++++++++++++++++-
 1 file changed, 54 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/microchip_t1.c b/drivers/net/phy/microchip_t1.c
index d0bc0125f3ef..6a7836c2961a 100644
--- a/drivers/net/phy/microchip_t1.c
+++ b/drivers/net/phy/microchip_t1.c
@@ -8,13 +8,17 @@
 #include <linux/phy.h>
 #include <linux/ethtool.h>
 #include <linux/ethtool_netlink.h>
+#include <linux/bitfield.h>
 
 #define PHY_ID_LAN87XX				0x0007c150
+#define PHY_ID_LAN937X				0x0007c180
 
 /* External Register Control Register */
 #define LAN87XX_EXT_REG_CTL                     (0x14)
 #define LAN87XX_EXT_REG_CTL_RD_CTL              (0x1000)
 #define LAN87XX_EXT_REG_CTL_WR_CTL              (0x0800)
+#define LAN87XX_REG_BANK_SEL_MASK		GENMASK(10, 8)
+#define LAN87XX_REG_ADDR_MASK			GENMASK(7, 0)
 
 /* External Register Read Data Register */
 #define LAN87XX_EXT_REG_RD_DATA                 (0x15)
@@ -76,7 +80,7 @@
 #define T1_PST_EQ_LCK_STG1_FRZ_CFG	0x6E
 
 #define DRIVER_AUTHOR	"Nisar Sayed <nisar.sayed@microchip.com>"
-#define DRIVER_DESC	"Microchip LAN87XX T1 PHY driver"
+#define DRIVER_DESC	"Microchip LAN87XX/LAN937x T1 PHY driver"
 
 struct access_ereg_val {
 	u8  mode;
@@ -86,6 +90,37 @@ struct access_ereg_val {
 	u16 mask;
 };
 
+static int lan937x_dsp_workaround(struct phy_device *phydev, u16 ereg, u8 bank)
+{
+	u8 prev_bank;
+	int rc = 0;
+	u16 val;
+
+	mutex_lock(&phydev->lock);
+	/* Read previous selected bank */
+	rc = phy_read(phydev, LAN87XX_EXT_REG_CTL);
+	if (rc < 0)
+		goto out_unlock;
+
+	/* store the prev_bank */
+	prev_bank = FIELD_GET(LAN87XX_REG_BANK_SEL_MASK, rc);
+
+	if (bank != prev_bank && bank == PHYACC_ATTR_BANK_DSP) {
+		val = ereg & ~LAN87XX_REG_ADDR_MASK;
+
+		val &= ~LAN87XX_EXT_REG_CTL_WR_CTL;
+		val |= LAN87XX_EXT_REG_CTL_RD_CTL;
+
+		/* access twice for DSP bank change,dummy access */
+		rc = phy_write(phydev, LAN87XX_EXT_REG_CTL, val);
+	}
+
+out_unlock:
+	mutex_unlock(&phydev->lock);
+
+	return rc;
+}
+
 static int access_ereg(struct phy_device *phydev, u8 mode, u8 bank,
 		       u8 offset, u16 val)
 {
@@ -114,6 +149,13 @@ static int access_ereg(struct phy_device *phydev, u8 mode, u8 bank,
 
 	ereg |= (bank << 8) | offset;
 
+	/* DSP bank access workaround for lan937x */
+	if (phydev->phy_id == PHY_ID_LAN937X) {
+		rc = lan937x_dsp_workaround(phydev, ereg, bank);
+		if (rc < 0)
+			return rc;
+	}
+
 	rc = phy_write(phydev, LAN87XX_EXT_REG_CTL, ereg);
 	if (rc < 0)
 		return rc;
@@ -642,6 +684,16 @@ static struct phy_driver microchip_t1_phy_driver[] = {
 		.resume         = genphy_resume,
 		.cable_test_start = lan87xx_cable_test_start,
 		.cable_test_get_status = lan87xx_cable_test_get_status,
+	},
+	{
+		PHY_ID_MATCH_MODEL(PHY_ID_LAN937X),
+		.name		= "Microchip LAN937x T1",
+		.features	= PHY_BASIC_T1_FEATURES,
+		.config_init	= lan87xx_config_init,
+		.suspend	= genphy_suspend,
+		.resume		= genphy_resume,
+		.cable_test_start = lan87xx_cable_test_start,
+		.cable_test_get_status = lan87xx_cable_test_get_status,
 	}
 };
 
@@ -649,6 +701,7 @@ module_phy_driver(microchip_t1_phy_driver);
 
 static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = {
 	{ PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX) },
+	{ PHY_ID_MATCH_MODEL(PHY_ID_LAN937X) },
 	{ }
 };
 
-- 
2.33.0

[PATCH net-next 6/6] net: phy: added ethtool master-slave configuration support

[Arun Ramadoss]

To configure the T1 phy as master or slave using the ethtool -s <dev>
master-slave <forced-master/forced-slave>, the config_aneg and read
status functions are added.

Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
---
 drivers/net/phy/microchip_t1.c | 90 ++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/drivers/net/phy/microchip_t1.c b/drivers/net/phy/microchip_t1.c
index 6a7836c2961a..8292f7305805 100644
--- a/drivers/net/phy/microchip_t1.c
+++ b/drivers/net/phy/microchip_t1.c
@@ -79,6 +79,9 @@
 #define T1_EQ_WT_FD_LCK_FRZ_CFG		0x6D
 #define T1_PST_EQ_LCK_STG1_FRZ_CFG	0x6E
 
+#define T1_MODE_STAT_REG		0x11
+#define T1_LINK_UP_MSK			BIT(0)
+
 #define DRIVER_AUTHOR	"Nisar Sayed <nisar.sayed@microchip.com>"
 #define DRIVER_DESC	"Microchip LAN87XX/LAN937x T1 PHY driver"
 
@@ -671,6 +674,89 @@ static int lan87xx_cable_test_get_status(struct phy_device *phydev,
 	return 0;
 }
 
+static int lan87xx_read_master_slave(struct phy_device *phydev)
+{
+	int rc = 0;
+
+	phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
+	phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
+
+	rc = phy_read(phydev, MII_CTRL1000);
+	if (rc < 0)
+		return rc;
+
+	if (rc & CTL1000_AS_MASTER)
+		phydev->master_slave_get = MASTER_SLAVE_CFG_MASTER_FORCE;
+	else
+		phydev->master_slave_get = MASTER_SLAVE_CFG_SLAVE_FORCE;
+
+	rc = phy_read(phydev, MII_STAT1000);
+	if (rc < 0)
+		return rc;
+
+	if (rc & LPA_1000MSRES)
+		phydev->master_slave_state = MASTER_SLAVE_STATE_MASTER;
+	else
+		phydev->master_slave_state = MASTER_SLAVE_STATE_SLAVE;
+
+	return rc;
+}
+
+static int lan87xx_read_status(struct phy_device *phydev)
+{
+	int rc = 0;
+
+	rc = phy_read(phydev, T1_MODE_STAT_REG);
+	if (rc < 0)
+		return rc;
+
+	if (rc & T1_LINK_UP_MSK)
+		phydev->link = 1;
+	else
+		phydev->link = 0;
+
+	phydev->speed = SPEED_UNKNOWN;
+	phydev->duplex = DUPLEX_UNKNOWN;
+	phydev->pause = 0;
+	phydev->asym_pause = 0;
+
+	rc = lan87xx_read_master_slave(phydev);
+	if (rc < 0)
+		return rc;
+
+	rc = genphy_read_status_fixed(phydev);
+	if (rc < 0)
+		return rc;
+
+	return rc;
+}
+
+static int lan87xx_config_aneg(struct phy_device *phydev)
+{
+	u16 ctl = 0;
+	int rc;
+
+	switch (phydev->master_slave_set) {
+	case MASTER_SLAVE_CFG_MASTER_FORCE:
+		ctl |= CTL1000_AS_MASTER;
+		break;
+	case MASTER_SLAVE_CFG_SLAVE_FORCE:
+		break;
+	case MASTER_SLAVE_CFG_UNKNOWN:
+	case MASTER_SLAVE_CFG_UNSUPPORTED:
+		return 0;
+	default:
+		phydev_warn(phydev, "Unsupported Master/Slave mode\n");
+		return -EOPNOTSUPP;
+	}
+
+	rc = phy_modify_changed(phydev, MII_CTRL1000, CTL1000_AS_MASTER, ctl);
+	if (rc == 1)
+		rc = genphy_soft_reset(phydev);
+
+	return rc;
+}
+
 static struct phy_driver microchip_t1_phy_driver[] = {
 	{
 		PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX),
@@ -682,6 +768,8 @@ static struct phy_driver microchip_t1_phy_driver[] = {
 		.handle_interrupt = lan87xx_handle_interrupt,
 		.suspend        = genphy_suspend,
 		.resume         = genphy_resume,
+		.config_aneg    = lan87xx_config_aneg,
+		.read_status	= lan87xx_read_status,
 		.cable_test_start = lan87xx_cable_test_start,
 		.cable_test_get_status = lan87xx_cable_test_get_status,
 	},
@@ -692,6 +780,8 @@ static struct phy_driver microchip_t1_phy_driver[] = {
 		.config_init	= lan87xx_config_init,
 		.suspend	= genphy_suspend,
 		.resume		= genphy_resume,
+		.config_aneg    = lan87xx_config_aneg,
+		.read_status	= lan87xx_read_status,
 		.cable_test_start = lan87xx_cable_test_start,
 		.cable_test_get_status = lan87xx_cable_test_get_status,
 	}
-- 
2.33.0

Re: [PATCH net-next 6/6] net: phy: added ethtool master-slave configuration support

[Andrew Lunn]

> +static int lan87xx_read_master_slave(struct phy_device *phydev)
> +{
> +	int rc = 0;
> +
> +	phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
> +	phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
> +
> +	rc = phy_read(phydev, MII_CTRL1000);
> +	if (rc < 0)
> +		return rc;
> +
> +	if (rc & CTL1000_AS_MASTER)
> +		phydev->master_slave_get = MASTER_SLAVE_CFG_MASTER_FORCE;
> +	else
> +		phydev->master_slave_get = MASTER_SLAVE_CFG_SLAVE_FORCE;
> +
> +	rc = phy_read(phydev, MII_STAT1000);
> +	if (rc < 0)
> +		return rc;
> +
> +	if (rc & LPA_1000MSRES)
> +		phydev->master_slave_state = MASTER_SLAVE_STATE_MASTER;
> +	else
> +		phydev->master_slave_state = MASTER_SLAVE_STATE_SLAVE;
> +
> +	return rc;
> +}

It looks like you can just call genphy_read_master_slave()? Or am i
missing some subtle difference?

> +static int lan87xx_config_aneg(struct phy_device *phydev)
> +{
> +	u16 ctl = 0;
> +	int rc;
> +
> +	switch (phydev->master_slave_set) {
> +	case MASTER_SLAVE_CFG_MASTER_FORCE:
> +		ctl |= CTL1000_AS_MASTER;
> +		break;
> +	case MASTER_SLAVE_CFG_SLAVE_FORCE:
> +		break;
> +	case MASTER_SLAVE_CFG_UNKNOWN:
> +	case MASTER_SLAVE_CFG_UNSUPPORTED:
> +		return 0;
> +	default:
> +		phydev_warn(phydev, "Unsupported Master/Slave mode\n");
> +		return -EOPNOTSUPP;
> +	}
> +
> +	rc = phy_modify_changed(phydev, MII_CTRL1000, CTL1000_AS_MASTER, ctl);
> +	if (rc == 1)
> +		rc = genphy_soft_reset(phydev);
> +
> +	return rc;
> +}

Please use genphy_setup_master_slave()

       Andrew

Re: [PATCH net-next 6/6] net: phy: added ethtool master-slave configuration support

[Arun.Ramadoss]

Hi Andrew,

On Fri, 2022-03-04 at 14:13 +0100, Andrew Lunn wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you
> know the content is safe
> 
> > +static int lan87xx_read_master_slave(struct phy_device *phydev)
> > +{
> > +     int rc = 0;
> > +
> > +     phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
> > +     phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
> > +
> > +     rc = phy_read(phydev, MII_CTRL1000);
> > +     if (rc < 0)
> > +             return rc;
> > +
> > +     if (rc & CTL1000_AS_MASTER)
> > +             phydev->master_slave_get =
> > MASTER_SLAVE_CFG_MASTER_FORCE;
> > +     else
> > +             phydev->master_slave_get =
> > MASTER_SLAVE_CFG_SLAVE_FORCE;
> > +
> > +     rc = phy_read(phydev, MII_STAT1000);
> > +     if (rc < 0)
> > +             return rc;
> > +
> > +     if (rc & LPA_1000MSRES)
> > +             phydev->master_slave_state =
> > MASTER_SLAVE_STATE_MASTER;
> > +     else
> > +             phydev->master_slave_state =
> > MASTER_SLAVE_STATE_SLAVE;
> > +
> > +     return rc;
> > +}
> 
> It looks like you can just call genphy_read_master_slave()? Or am i
> missing some subtle difference?

Thanks for the comment.

genphy_read_master_slave() and genphy_setup_master_slave() functions
first check for whether phy is gigabit capable. If no, it returns.
LAN87XX is not gigabit capable, so I replicated the genphy function and
removed only the gigabit capable check. I took nxp-tja11xx code as
reference, which has similar implementation.

> 
> > +static int lan87xx_config_aneg(struct phy_device *phydev)
> > +{
> > +     u16 ctl = 0;
> > +     int rc;
> > +
> > +     switch (phydev->master_slave_set) {
> > +     case MASTER_SLAVE_CFG_MASTER_FORCE:
> > +             ctl |= CTL1000_AS_MASTER;
> > +             break;
> > +     case MASTER_SLAVE_CFG_SLAVE_FORCE:
> > +             break;
> > +     case MASTER_SLAVE_CFG_UNKNOWN:
> > +     case MASTER_SLAVE_CFG_UNSUPPORTED:
> > +             return 0;
> > +     default:
> > +             phydev_warn(phydev, "Unsupported Master/Slave
> > mode\n");
> > +             return -EOPNOTSUPP;
> > +     }
> > +
> > +     rc = phy_modify_changed(phydev, MII_CTRL1000,
> > CTL1000_AS_MASTER, ctl);
> > +     if (rc == 1)
> > +             rc = genphy_soft_reset(phydev);
> > +
> > +     return rc;
> > +}
> 
> Please use genphy_setup_master_slave()
> 
>        Andrew

Re: [PATCH net-next 6/6] net: phy: added ethtool master-slave configuration support

[Andrew Lunn]

> > It looks like you can just call genphy_read_master_slave()? Or am i
> > missing some subtle difference?
> 
> Thanks for the comment.
> 
> genphy_read_master_slave() and genphy_setup_master_slave() functions
> first check for whether phy is gigabit capable. If no, it returns.
> LAN87XX is not gigabit capable, so I replicated the genphy function and
> removed only the gigabit capable check. I took nxp-tja11xx code as
> reference, which has similar implementation.

O.K, please refactor genphy_read_master_slave() and split it into two.
You can then call the inner function which does not perform the speed
check. Maybe you can also change nxp-tja11xx in the same way.

       Andrew

Re: [PATCH net-next 0/6] Add support for LAN937x T1 Phy Driver

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Fri, 4 Mar 2022 15:13:55 +0530 you wrote:
> LAN937x is a Multi-port 100Base-T1 Switch and it internally uses LAN87xx
> T1 Phy.  This series of patch update the initialization routine for the
> LAN87xx phy and also add LAN937x part support. Added the T1 Phy
> master-slave configuration through ethtool.
> 
> Arun Ramadoss (6):
>   net: phy: used genphy_soft_reset for phy reset in LAN87xx
>   net: phy: used the PHY_ID_MATCH_MODEL macro for LAN87XX
>   net: phy: removed empty lines in LAN87XX
>   net: phy: updated the initialization routine for LAN87xx
>   net: phy: added the LAN937x phy support
>   net: phy: added ethtool master-slave configuration support
> 
> [...]

Here is the summary with links:
  - [net-next,1/6] net: phy: used genphy_soft_reset for phy reset in LAN87xx
    https://git.kernel.org/netdev/net-next/c/8eee3d353626
  - [net-next,2/6] net: phy: used the PHY_ID_MATCH_MODEL macro for LAN87XX
    https://git.kernel.org/netdev/net-next/c/79cea9a9c93a
  - [net-next,3/6] net: phy: removed empty lines in LAN87XX
    https://git.kernel.org/netdev/net-next/c/ccc8cc5badde
  - [net-next,4/6] net: phy: updated the initialization routine for LAN87xx
    https://git.kernel.org/netdev/net-next/c/8637034bc63f
  - [net-next,5/6] net: phy: added the LAN937x phy support
    https://git.kernel.org/netdev/net-next/c/680baca546f2
  - [net-next,6/6] net: phy: added ethtool master-slave configuration support
    https://git.kernel.org/netdev/net-next/c/8a1b415d70b7

You are awesome, thank you!
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