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