net: phy: ca_phy: Add driver for CAxxxx SoCs

Add phy driver support for MACs embedded inside Cortina Access SoCs

Signed-off-by: Abbie Chang <abbie.chang@cortina-access.com>
Signed-off-by: Alex Nemirovsky <alex.nemirovsky@cortina-access.com>

CC: Joe Hershberger <joe.hershberger@ni.com>
CC: Tom Rini <trini@konsulko.com>
CC: Aaron Tseng <aaron.tseng@cortina-access.com>

Moved out PHY specific code out of Cortina NI Ethernet driver
and into a Cortina Access PHY interface driver

MAINTAINERS

@@ -202,6 +202,7 @@ F:	drivers/mtd/nand/raw/cortina_nand.c
 F:	drivers/mtd/nand/raw/cortina_nand.h
 F:	drivers/net/cortina_ni.c
 F:	drivers/net/cortina_ni.h
+F:	drivers/net/phy/ca_phy.c
 F:	configs/cortina_presidio-asic-pnand_defconfig
 
 ARM/CZ.NIC TURRIS MOX SUPPORT
@@ -815,6 +816,7 @@ F:	drivers/i2c/i2c-cortina.c
 F:	drivers/i2c/i2c-cortina.h
 F:	drivers/net/cortina_ni.c
 F:	drivers/net/cortina_ni.h
+F:	drivers/net/phy/ca_phy.c
 
 MIPS MEDIATEK
 M:	Weijie Gao <weijie.gao@mediatek.com>

drivers/net/phy/Kconfig

@@ -131,6 +131,13 @@ config SYS_CORTINA_FW_IN_SPIFLASH
 
 endchoice
 
+config PHY_CORTINA_ACCESS
+	bool "Cortina Access Ethernet PHYs support"
+	default y
+	depends on CORTINA_NI_ENET
+	help
+		Cortina Access Ethernet PHYs init process
+
 config PHY_DAVICOM
 	bool "Davicom Ethernet PHYs support"
 

drivers/net/phy/Makefile

@@ -14,6 +14,7 @@ obj-$(CONFIG_PHY_AQUANTIA) += aquantia.o
 obj-$(CONFIG_PHY_ATHEROS) += atheros.o
 obj-$(CONFIG_PHY_BROADCOM) += broadcom.o
 obj-$(CONFIG_PHY_CORTINA) += cortina.o
+obj-$(CONFIG_PHY_CORTINA_ACCESS) += ca_phy.o
 obj-$(CONFIG_PHY_DAVICOM) += davicom.o
 obj-$(CONFIG_PHY_ET1011C) += et1011c.o
 obj-$(CONFIG_PHY_LXT) += lxt.o

drivers/net/phy/ca_phy.c

@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Cortina CS4315/CS4340 10G PHY drivers
+ *
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ * Copyright 2018 NXP
+ *
+ */
+
+#include <config.h>
+#include <common.h>
+#include <log.h>
+#include <malloc.h>
+#include <linux/ctype.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/err.h>
+#include <phy.h>
+
+#define PHY_ID_RTL8211_EXT	0x001cc910
+#define PHY_ID_RTL8211_INT	0x001cc980
+#define PHY_ID_MASK		0xFFFFFFF0
+
+static void __internal_phy_init(struct phy_device *phydev, int reset_phy)
+{
+	u8 phy_addr;
+	u16 data;
+
+	/* should initialize 4 GPHYs at once */
+	for (phy_addr = 4; phy_addr > 0; phy_addr--) {
+		phydev->addr = phy_addr;
+		phy_write(phydev, MDIO_DEVAD_NONE, 31, 0x0BC6);
+		phy_write(phydev, MDIO_DEVAD_NONE, 16, 0x0053);
+		phy_write(phydev, MDIO_DEVAD_NONE, 18, 0x4003);
+		phy_write(phydev, MDIO_DEVAD_NONE, 22, 0x7e01);
+		phy_write(phydev, MDIO_DEVAD_NONE, 31, 0x0A42);
+		phy_write(phydev, MDIO_DEVAD_NONE, 31, 0x0A40);
+		phy_write(phydev, MDIO_DEVAD_NONE, 0, 0x1140);
+	}
+
+	/* workaround to fix GPHY fail */
+	for (phy_addr = 1; phy_addr < 5; phy_addr++) {
+		/* Clear clock fail interrupt */
+		phydev->addr = phy_addr;
+		phy_write(phydev, MDIO_DEVAD_NONE, 31, 0xB90);
+		data = phy_read(phydev, MDIO_DEVAD_NONE, 19);
+		if (data == 0x10) {
+			phy_write(phydev, MDIO_DEVAD_NONE, 31, 0xB90);
+			data = phy_read(phydev, MDIO_DEVAD_NONE, 19);
+			printf("%s: read again.\n", __func__);
+		}
+
+		printf("%s: phy_addr=%d, read register 19, value=0x%x\n",
+		       __func__, phy_addr, data);
+	}
+}
+
+static void __external_phy_init(struct phy_device *phydev, int reset_phy)
+{
+	u16 val;
+
+	/* Disable response PHYAD=0 function of RTL8211 series PHY */
+	/* REG31 write 0x0007, set to extension page */
+	phy_write(phydev, MDIO_DEVAD_NONE, 31, 0x0007);
+
+	/* REG30 write 0x002C, set to extension page 44 */
+	phy_write(phydev, MDIO_DEVAD_NONE, 30, 0x002C);
+
+	/*
+	 * REG27 write bit[2] = 0 disable response PHYAD = 0 function.
+	 * we should read REG27 and clear bit[2], and write back
+	 */
+	val = phy_read(phydev, MDIO_DEVAD_NONE, 27);
+	val &= ~(1 << 2);
+	phy_write(phydev, MDIO_DEVAD_NONE, 27, val);
+
+	/* REG31 write 0X0000, back to page0 */
+	phy_write(phydev, MDIO_DEVAD_NONE, 31, 0x0000);
+}
+
+static int rtl8211_external_config(struct phy_device *phydev)
+{
+	__external_phy_init(phydev, 0);
+	printf("%s: initialize RTL8211 external done.\n", __func__);
+	return 0;
+}
+
+static int rtl8211_internal_config(struct phy_device *phydev)
+{
+	struct phy_device phydev_init;
+
+	memcpy(&phydev_init, phydev, sizeof(struct phy_device));
+	/* should initialize 4 GPHYs at once */
+	__internal_phy_init(&phydev_init, 0);
+	printf("%s: initialize RTL8211 internal done.\n", __func__);
+	return 0;
+}
+
+static int rtl8211_probe(struct phy_device *phydev)
+{
+	/* disable reset behavior */
+	phydev->flags = PHY_FLAG_BROKEN_RESET;
+	return 0;
+}
+
+/* Support for RTL8211 External PHY */
+struct phy_driver rtl8211_external_driver = {
+	.name = "Cortina RTL8211 External",
+	.uid = PHY_ID_RTL8211_EXT,
+	.mask = PHY_ID_MASK,
+	.features = PHY_GBIT_FEATURES,
+	.config = &rtl8211_external_config,
+	.probe = &rtl8211_probe,
+	.startup = &genphy_startup,
+};
+
+/* Support for RTL8211 Internal PHY */
+struct phy_driver rtl8211_internal_driver = {
+	.name = "Cortina RTL8211 Inrernal",
+	.uid = PHY_ID_RTL8211_INT,
+	.mask = PHY_ID_MASK,
+	.features = PHY_GBIT_FEATURES,
+	.config = &rtl8211_internal_config,
+	.probe = &rtl8211_probe,
+	.startup = &genphy_startup,
+};
+
+int phy_cortina_access_init(void)
+{
+	phy_register(&rtl8211_external_driver);
+	phy_register(&rtl8211_internal_driver);
+	return 0;
+}

drivers/net/phy/phy.c

@@ -500,6 +500,9 @@ int phy_init(void)
 #ifdef CONFIG_PHY_CORTINA
 	phy_cortina_init();
 #endif
+#ifdef CONFIG_PHY_CORTINA_ACCESS
+	phy_cortina_access_init();
+#endif
 #ifdef CONFIG_PHY_DAVICOM
 	phy_davicom_init();
 #endif

include/phy.h

@@ -493,6 +493,7 @@ int phy_aquantia_init(void);
 int phy_atheros_init(void);
 int phy_broadcom_init(void);
 int phy_cortina_init(void);
+int phy_cortina_access_init(void);
 int phy_davicom_init(void);
 int phy_et1011c_init(void);
 int phy_lxt_init(void);