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Date: Fri, 17 Mar 2023 22:30:42 +0800
From: David Yang <mmyangfl@...il.com>
To: unlisted-recipients:; (no To-header on input)
Cc: David Yang <mmyangfl@...il.com>, Andrew Lunn <andrew@...n.ch>,
Heiner Kallweit <hkallweit1@...il.com>,
Russell King <linux@...linux.org.uk>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org,
netdev@...r.kernel.org
Subject: [PATCH] net: phy: hisi-festa: Add support for HiSilicon Festa PHYs
HiSilicon Festa PHYs were used on some HiSilicon SoCs. This patch injects
firmwares found on vendor kernels.
Signed-off-by: David Yang <mmyangfl@...il.com>
---
drivers/net/phy/Kconfig | 5 ++
drivers/net/phy/Makefile | 1 +
drivers/net/phy/hisi-festa.c | 169 +++++++++++++++++++++++++++++++++++
3 files changed, 175 insertions(+)
create mode 100644 drivers/net/phy/hisi-festa.c
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 54874555c..e7551e9b3 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -177,6 +177,11 @@ config DAVICOM_PHY
help
Currently supports dm9161e and dm9131
+config HISI_FESTA_PHY
+ tristate "HiSilicon Festa PHYs"
+ help
+ Supports the HiSilicon Festa PHYs.
+
config ICPLUS_PHY
tristate "ICPlus PHYs"
help
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index b5138066b..2c5aded6b 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_DP83869_PHY) += dp83869.o
obj-$(CONFIG_DP83TC811_PHY) += dp83tc811.o
obj-$(CONFIG_DP83TD510_PHY) += dp83td510.o
obj-$(CONFIG_FIXED_PHY) += fixed_phy.o
+obj-$(CONFIG_HISI_FESTA_PHY) += hisi-festa.o
obj-$(CONFIG_ICPLUS_PHY) += icplus.o
obj-$(CONFIG_INTEL_XWAY_PHY) += intel-xway.o
obj-$(CONFIG_LSI_ET1011C_PHY) += et1011c.o
diff --git a/drivers/net/phy/hisi-festa.c b/drivers/net/phy/hisi-festa.c
new file mode 100644
index 000000000..ab54ed3ca
--- /dev/null
+++ b/drivers/net/phy/hisi-festa.c
@@ -0,0 +1,169 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Driver for HiSilicon Festa PHYs
+ *
+ * This module does nothing than firmware injection. If you don't use firmware,
+ * simply blacklist this module.
+ *
+ * Copyright (c) 2023 David Yang
+ */
+#include <linux/errno.h>
+#include <linux/firmware.h>
+#include <linux/init.h>
+#include <linux/mii.h>
+#include <linux/module.h>
+#include <linux/phy.h>
+
+#define PHY_ID_HISILICON_FESTAV200 0x20669813
+#define PHY_ID_HISILICON_FESTAV220 0x20669823
+#define PHY_ID_HISILICON_FESTAV300 0x20669833
+#define PHY_ID_HISILICON_FESTAV320 0x20669843
+#define PHY_ID_HISILICON_FESTAV330 0x20669853
+#define PHY_ID_HISILICON_FESTAV331 0x20669863
+
+#define MII_EXPMD 0x1d /* Expanded memory data */
+#define MII_EXPMA 0x1e /* Expanded memory address */
+
+/* bus->mdio_lock should be locked when using this function */
+static inline int hisi_festa_read_expanded(struct phy_device *phydev, u16 addr)
+{
+ __phy_write(phydev, MII_EXPMA, addr);
+ return __phy_read(phydev, MII_EXPMD);
+}
+
+/* bus->mdio_lock should be locked when using this function */
+static inline int hisi_festa_write_expanded(struct phy_device *phydev, u16 addr, u8 val)
+{
+ __phy_write(phydev, MII_EXPMA, addr);
+ __phy_write(phydev, MII_EXPMD, val);
+ return 0;
+}
+
+/* bus->mdio_lock should be locked when using this function */
+static inline int hisi_festa_write_expanded_mem(struct phy_device *phydev, u16 addr,
+ const u8 *data, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ hisi_festa_write_expanded(phydev, addr + i, data[i]);
+ return 0;
+}
+
+static int hisi_festa_write_fw(struct phy_device *phydev, const struct firmware *fw)
+{
+ static const u8 prologue[] = {0xbd, 0x34, 0x00, 0x39};
+ int ret;
+
+ phy_lock_mdio_bus(phydev);
+
+ ret = __phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
+ if (ret) {
+ phydev_err(phydev, "cannot suspend device\n");
+ goto out;
+ }
+
+ hisi_festa_write_expanded_mem(phydev, 0x33f9, prologue, sizeof(prologue));
+ /* mask jump instruction */
+ hisi_festa_write_expanded(phydev, 0x3400, 0x39);
+ hisi_festa_write_expanded_mem(phydev, 0x3401, fw->data + 1, fw->size - 1);
+ /* now release firmware */
+ hisi_festa_write_expanded(phydev, 0x3400, fw->data[0]);
+ hisi_festa_write_expanded(phydev, 0x33f8, 0x01);
+
+ ret = __phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
+
+out:
+ phy_unlock_mdio_bus(phydev);
+ return ret;
+}
+
+static int hisi_festa_patch_fw(struct phy_device *phydev)
+{
+ int ret;
+ char fw_name[64];
+ const struct firmware *fw;
+
+ snprintf(fw_name, sizeof(fw_name), "hisilicon/festa.%08x.ucode", phydev->phy_id);
+
+ ret = request_firmware(&fw, fw_name, &phydev->mdio.dev);
+ if (ret) {
+ /* err message already printed by request_firmware */
+ return -EAGAIN;
+ }
+
+ if (fw->data[0] != 0x01 || fw->data[1] != 0xcc) {
+ phydev_err(phydev, "%s does not look like valid firmware; refused to load\n",
+ fw_name);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = hisi_festa_write_fw(phydev, fw);
+ if (ret) {
+ phydev_err(phydev, "download firmware %s failed\n", fw_name);
+ goto out;
+ }
+
+ phydev_info(phydev, "using firmware %s\n", fw_name);
+
+out:
+ release_firmware(fw);
+ return ret;
+}
+
+static int hisi_festa_config_init(struct phy_device *phydev)
+{
+ hisi_festa_patch_fw(phydev);
+ /* ok, use programmed firmware */
+ return 0;
+}
+
+static struct phy_driver hisi_festa_driver[] = {
+ {
+ PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV200),
+ .name = "HiSilicon Festa v200/v210",
+ .config_init = hisi_festa_config_init,
+ },
+ {
+ PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV220),
+ .name = "HiSilicon Festa v220",
+ .config_init = hisi_festa_config_init,
+ },
+ {
+ PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV300),
+ .name = "HiSilicon Festa v300",
+ .config_init = hisi_festa_config_init,
+ },
+ {
+ PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV320),
+ .name = "HiSilicon Festa v320",
+ .config_init = hisi_festa_config_init,
+ },
+ {
+ PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV330),
+ .name = "HiSilicon Festa v330",
+ .config_init = hisi_festa_config_init,
+ },
+ {
+ PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV331),
+ .name = "HiSilicon Festa v331",
+ .config_init = hisi_festa_config_init,
+ },
+};
+
+module_phy_driver(hisi_festa_driver);
+
+static struct mdio_device_id __maybe_unused hisi_festa_tbl[] = {
+ { PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV200) },
+ { PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV220) },
+ { PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV300) },
+ { PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV320) },
+ { PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV330) },
+ { PHY_ID_MATCH_MODEL(PHY_ID_HISILICON_FESTAV331) },
+ { }
+};
+
+MODULE_DEVICE_TABLE(mdio, hisi_festa_tbl);
+MODULE_DESCRIPTION("HiSilicon Festa PHY driver");
+MODULE_LICENSE("Dual MIT/GPL");
--
2.39.2
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