SBC_builder/patch/kernel/sunxi-6.14/patches.armbian/net-phy-Add-support-for-AC200-EPHY.patch
2025-06-01 01:05:27 +02:00

144 lines
4.4 KiB
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From 9ea339d70cfa03d39fecfc3d980c758ed67c4639 Mon Sep 17 00:00:00 2001
From: Jernej Skrabec <jernej.skrabec@siol.net>
Date: Fri, 16 Aug 2019 16:38:57 +0200
Subject: net: phy: Add support for AC200 EPHY
The X-Powers AC200 mixed signal chip contains a 100Mbit/s Ethernet PHY.
While its sporting a usable default setup, and can be controlled by the
generic IEEE802.3-C22 PHY driver, the BSP sets up some extra registers,
which this driver here covers.
Add a PHY driver matching the AC200 EPHY ID registers, and which
programs some PHY registers according to the BSP code.
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
---
drivers/net/phy/Kconfig | 7 ++++
drivers/net/phy/Makefile | 1 +
drivers/net/phy/ac200-phy.c | 82 +++++++++++++++++++++++++++++++++++++
3 files changed, 90 insertions(+)
create mode 100644 drivers/net/phy/ac200-phy.c
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 01b235b3bb7e..be4670e6b266 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -84,6 +84,13 @@ config AIR_EN8811H_PHY
help
Currently supports the Airoha EN8811H PHY.
+config AC200_PHY
+ tristate "AC200 EPHY"
+ depends on NVMEM
+ depends on OF
+ help
+ Fast ethernet PHY as found in X-Powers AC200 multi-function device.
+
config AMD_PHY
tristate "AMD and Altima PHYs"
help
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 90f886844381..4bba8c64bcc9 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_SFP) += sfp.o
sfp-obj-$(CONFIG_SFP) += sfp-bus.o
obj-y += $(sfp-obj-y) $(sfp-obj-m)
+obj-$(CONFIG_AC200_PHY) += ac200-phy.o
obj-$(CONFIG_ADIN_PHY) += adin.o
obj-$(CONFIG_ADIN1100_PHY) += adin1100.o
obj-$(CONFIG_AIR_EN8811H_PHY) += air_en8811h.o
diff --git a/drivers/net/phy/ac200-phy.c b/drivers/net/phy/ac200-phy.c
new file mode 100644
index 000000000000..8499914f49b8
--- /dev/null
+++ b/drivers/net/phy/ac200-phy.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0+
+/**
+ * Driver for AC200 Ethernet PHY
+ *
+ * Copyright (c) 2019 Jernej Skrabec <jernej.skrabec@gmail.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/phy.h>
+
+#define AC200_EPHY_ID 0x00441400
+#define AC200_EPHY_ID_MASK 0x0ffffff0
+
+static int ac200_ephy_config_init(struct phy_device *phydev)
+{
+ phy_write(phydev, 0x1f, 0x0100); /* Switch to Page 1 */
+ phy_write(phydev, 0x12, 0x4824); /* Disable APS */
+
+ phy_write(phydev, 0x1f, 0x0200); /* Switch to Page 2 */
+ phy_write(phydev, 0x18, 0x0000); /* PHYAFE TRX optimization */
+
+ phy_write(phydev, 0x1f, 0x0600); /* Switch to Page 6 */
+ phy_write(phydev, 0x14, 0x708f); /* PHYAFE TX optimization */
+ phy_write(phydev, 0x13, 0xF000); /* PHYAFE RX optimization */
+ phy_write(phydev, 0x15, 0x1530);
+
+ phy_write(phydev, 0x1f, 0x0800); /* Switch to Page 8 */
+ phy_write(phydev, 0x18, 0x00bc); /* PHYAFE TRX optimization */
+
+ phy_write(phydev, 0x1f, 0x0100); /* switch to page 1 */
+ phy_clear_bits(phydev, 0x17, BIT(3)); /* disable intelligent EEE */
+
+ /* disable 802.3az EEE */
+ phy_write(phydev, 0x1f, 0x0200); /* switch to page 2 */
+ phy_write(phydev, 0x18, 0x0000);
+ phy_write(phydev, 0x1f, 0x0000); /* switch to page 0 */
+ phy_clear_bits_mmd(phydev, 0x7, 0x3c, BIT(1));
+
+ /* FIXME: This is probably H6 specific */
+ phy_set_bits(phydev, 0x13, BIT(12));
+
+ return 0;
+}
+
+static int ac200_ephy_probe(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct clk *clk;
+
+ clk = devm_clk_get_optional_enabled(dev, NULL);
+ if (IS_ERR(clk))
+ return dev_err_probe(dev, PTR_ERR(clk),
+ "Failed to request clock\n");
+
+ return 0;
+}
+
+static struct phy_driver ac200_ephy_driver[] = {
+ {
+ .phy_id = AC200_EPHY_ID,
+ .phy_id_mask = AC200_EPHY_ID_MASK,
+ .name = "Allwinner AC200 EPHY",
+ .soft_reset = genphy_soft_reset,
+ .config_init = ac200_ephy_config_init,
+ .probe = ac200_ephy_probe,
+ .suspend = genphy_suspend,
+ .resume = genphy_resume,
+ }
+};
+module_phy_driver(ac200_ephy_driver);
+
+MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec@gmail.com>");
+MODULE_DESCRIPTION("AC200 Ethernet PHY driver");
+MODULE_LICENSE("GPL");
+
+static const struct mdio_device_id __maybe_unused ac200_ephy_phy_tbl[] = {
+ { AC200_EPHY_ID, AC200_EPHY_ID_MASK },
+ { }
+};
+MODULE_DEVICE_TABLE(mdio, ac200_ephy_phy_tbl);
--
2.35.3