net/phy/cortina: Add support for CS4223 PHY

Add support for Cortina CS4223 10G PHY
  - As per the CS4223 specs, an EEPROM module is
    connected to the PHY. At startup the PHY reads
    the firmware line and tries to load the firmware
    into the internal memory.
  - This driver reads the EEPROM status
    and checks if firmware has been loaded

Signed-off-by: Vicentiu Galanopulo <vicentiu.galanopulo@nxp.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/net/phy/cortina.c

@@ -284,6 +284,38 @@ int cs4340_startup(struct phy_device *phydev)
 	return 0;
 }
 
+int cs4223_phy_init(struct phy_device *phydev)
+{
+	int reg_value;
+
+	reg_value = phy_read(phydev, 0x00, CS4223_EEPROM_STATUS);
+	if (!(reg_value & CS4223_EEPROM_FIRMWARE_LOADDONE)) {
+		printf("%s CS4223 Firmware not present in EERPOM\n", __func__);
+		return -ENOSYS;
+	}
+
+	return 0;
+}
+
+int cs4223_config(struct phy_device *phydev)
+{
+	return cs4223_phy_init(phydev);
+}
+
+int cs4223_probe(struct phy_device *phydev)
+{
+	phydev->flags = PHY_FLAG_BROKEN_RESET;
+	return 0;
+}
+
+int cs4223_startup(struct phy_device *phydev)
+{
+	phydev->link = 1;
+	phydev->speed = SPEED_10000;
+	phydev->duplex = DUPLEX_FULL;
+	return 0;
+}
+
 struct phy_driver cs4340_driver = {
 	.name = "Cortina CS4315/CS4340",
 	.uid = PHY_UID_CS4340,
@@ -298,9 +330,23 @@ struct phy_driver cs4340_driver = {
 	.shutdown = &gen10g_shutdown,
 };
 
+struct phy_driver cs4223_driver = {
+	.name = "Cortina CS4223",
+	.uid = PHY_UID_CS4223,
+	.mask = 0x0ffff00f,
+	.features = PHY_10G_FEATURES,
+	.mmds = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS |
+		 MDIO_DEVS_AN),
+	.config = &cs4223_config,
+	.probe	= &cs4223_probe,
+	.startup = &cs4223_startup,
+	.shutdown = &gen10g_shutdown,
+};
+
 int phy_cortina_init(void)
 {
 	phy_register(&cs4340_driver);
+	phy_register(&cs4223_driver);
 	return 0;
 }
 
@@ -319,7 +365,7 @@ int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
 		return -EIO;
 	*phy_id |= (phy_reg & 0xffff);
 
-	if (*phy_id == PHY_UID_CS4340)
+	if ((*phy_id == PHY_UID_CS4340) || (*phy_id == PHY_UID_CS4223))
 		return 0;
 
 	/*

include/cortina.h

@@ -64,6 +64,10 @@
 #define VILLA_LINE_SDS_COMMON_STX0_TX_OUTPUT_CTRLA 0x427
 #define VILLA_LINE_SDS_COMMON_STX0_TX_OUTPUT_CTRLB 0x428
 
+/* Cortina CS4223 */
+#define CS4223_EEPROM_STATUS  0x5001
+#define CS4223_EEPROM_FIRMWARE_LOADDONE  0x1
+
 #define mseq_edc_bist_done (0x1<<0)
 #define mseq_edc_bist_fail (0x1<<8)
 

include/phy.h

@@ -314,6 +314,7 @@ static inline bool phy_interface_is_sgmii(struct phy_device *phydev)
 
 /* PHY UIDs for various PHYs that are referenced in external code */
 #define PHY_UID_CS4340  0x13e51002
+#define PHY_UID_CS4223  0x03e57003
 #define PHY_UID_TN2020	0x00a19410
 
 #endif