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authorOleksij Rempel <linux@rempel-privat.de>2017-09-14 10:25:06 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2017-09-20 08:28:28 +0200
commite9edd1ad49eda3bf1c7f973480593baf9c739ecb (patch)
treea0d0a1244271176750ead731c8b09edda4ac88ba
parent130fc67897ba03b3ca847c5204764e4f5bed95a4 (diff)
downloadbarebox-e9edd1ad49eda3bf1c7f973480593baf9c739ecb.tar.gz
net: phy: add ar8327 driver
The Atheros ar8327 is a seven port gigabit ethernet switch. This patch adds a driver for the phys in it. Signed-off-by: Oleksij Rempel <linux@rempel-privat.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r--drivers/net/phy/Kconfig5
-rw-r--r--drivers/net/phy/Makefile1
-rw-r--r--drivers/net/phy/ar8327.c280
3 files changed, 286 insertions, 0 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index d30f65b..ea2e062 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -8,6 +8,11 @@ if PHYLIB
comment "MII PHY device drivers"
+config AR8327N_PHY
+ bool "Driver for QCA AR8327N PHYs"
+ ---help---
+ Currently supports the AR8327N PHY.
+
config AT803X_PHY
bool "Driver for Atheros AT803X PHYs"
---help---
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 10732f8..13b8f65 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -1,4 +1,5 @@
obj-y += phy.o mdio_bus.o
+obj-$(CONFIG_AR8327N_PHY) += ar8327.o
obj-$(CONFIG_AT803X_PHY) += at803x.o
obj-$(CONFIG_LXT_PHY) += lxt.o
obj-$(CONFIG_MARVELL_PHY) += marvell.o
diff --git a/drivers/net/phy/ar8327.c b/drivers/net/phy/ar8327.c
new file mode 100644
index 0000000..a0b1002
--- /dev/null
+++ b/drivers/net/phy/ar8327.c
@@ -0,0 +1,280 @@
+/*
+ * Copyright (C) 2017 Oleksij Rempel <linux@rempel-privat.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <common.h>
+#include <init.h>
+#include <linux/phy.h>
+#include <linux/string.h>
+
+#define ATHR_PHY_MAX 5
+
+/*****************/
+/* PHY Registers */
+/*****************/
+#define ATHR_PHY_CONTROL 0x00
+#define ATHR_PHY_STATUS 0x01
+#define ATHR_PHY_ID1 0x02
+#define ATHR_PHY_ID2 0x03
+#define ATHR_AUTONEG_ADVERT 0x04
+#define ATHR_LINK_PARTNER_ABILITY 0x05
+#define ATHR_AUTONEG_EXPANSION 0x06
+#define ATHR_NEXT_PAGE_TRANSMIT 0x07
+#define ATHR_LINK_PARTNER_NEXT_PAGE 0x08
+#define ATHR_1000BASET_CONTROL 0x09
+#define ATHR_1000BASET_STATUS 0x0a
+#define ATHR_PHY_SPEC_CONTROL 0x10
+#define ATHR_PHY_SPEC_STATUS 0x11
+#define ATHR_DEBUG_PORT_ADDRESS 0x1d
+#define ATHR_DEBUG_PORT_DATA 0x1e
+
+/* Advertisement register. */
+#define ATHR_ADVERTISE_ASYM_PAUSE 0x0800
+#define ATHR_ADVERTISE_PAUSE 0x0400
+#define ATHR_ADVERTISE_100FULL 0x0100
+#define ATHR_ADVERTISE_100HALF 0x0080
+#define ATHR_ADVERTISE_10FULL 0x0040
+#define ATHR_ADVERTISE_10HALF 0x0020
+
+#define ATHR_ADVERTISE_ALL (ATHR_ADVERTISE_ASYM_PAUSE | ATHR_ADVERTISE_PAUSE | \
+ ATHR_ADVERTISE_10HALF | ATHR_ADVERTISE_10FULL | \
+ ATHR_ADVERTISE_100HALF | ATHR_ADVERTISE_100FULL)
+
+/* ATHR_PHY_CONTROL fields */
+#define ATHR_CTRL_SOFTWARE_RESET 0x8000
+#define ATHR_CTRL_AUTONEGOTIATION_ENABLE 0x1000
+
+/* 1000BASET_CONTROL */
+#define ATHR_ADVERTISE_1000FULL 0x0200
+
+/* Phy Specific status fields */
+#define ATHR_STATUS_LINK_PASS 0x0400
+
+static u32 ar8327n_reg_read(struct phy_device *phydev, u32 reg_addr)
+{
+ u32 reg_word_addr;
+ u32 phy_addr, tmp_val, reg_val;
+ u16 phy_val;
+ u8 phy_reg;
+
+ /* change reg_addr to 16-bit word address, 32-bit aligned */
+ reg_word_addr = (reg_addr & 0xfffffffc) >> 1;
+
+ /* configure register high address */
+ phy_addr = 0x18;
+ phy_reg = 0x0;
+ phy_val = (u16) ((reg_word_addr >> 8) & 0x1ff); /* bit16-8 of reg address */
+ mdiobus_write(phydev->bus, phy_addr, phy_reg, phy_val);
+
+ /* For some registers such as MIBs, since it is read/clear, we should */
+ /* read the lower 16-bit register then the higher one */
+
+ /* read register in lower address */
+ phy_addr = 0x10 | ((reg_word_addr >> 5) & 0x7); /* bit7-5 of reg address */
+ phy_reg = (u8) (reg_word_addr & 0x1f); /* bit4-0 of reg address */
+ reg_val = (u32) mdiobus_read(phydev->bus, phy_addr, phy_reg);
+
+ /* read register in higher address */
+ reg_word_addr++;
+ phy_addr = 0x10 | ((reg_word_addr >> 5) & 0x7); /* bit7-5 of reg address */
+ phy_reg = (u8) (reg_word_addr & 0x1f); /* bit4-0 of reg address */
+ reg_val = (u32) mdiobus_read(phydev->bus, phy_addr, phy_reg);
+ reg_val |= (tmp_val << 16);
+
+ return reg_val;
+}
+
+static void ar8327n_reg_write(struct phy_device *phydev, u32 reg_addr,
+ u32 reg_val)
+{
+ u32 reg_word_addr;
+ u32 phy_addr;
+ u16 phy_val;
+ u8 phy_reg;
+
+ /* change reg_addr to 16-bit word address, 32-bit aligned */
+ reg_word_addr = (reg_addr & 0xfffffffc) >> 1;
+
+ /* configure register high address */
+ phy_addr = 0x18;
+ phy_reg = 0x0;
+ phy_val = (u16) ((reg_word_addr >> 8) & 0x1ff); /* bit16-8 of reg address */
+ mdiobus_write(phydev->bus, phy_addr, phy_reg, phy_val);
+
+ /* For some registers such as ARL and VLAN, since they include BUSY bit */
+ /* in lower address, we should write the higher 16-bit register then the */
+ /* lower one */
+
+ /* read register in higher address */
+ reg_word_addr++;
+ phy_addr = 0x10 | ((reg_word_addr >> 5) & 0x7); /* bit7-5 of reg address */
+ phy_reg = (u8) (reg_word_addr & 0x1f); /* bit4-0 of reg address */
+ phy_val = (u16) ((reg_val >> 16) & 0xffff);
+ mdiobus_write(phydev->bus, phy_addr, phy_reg, phy_val);
+
+ /* write register in lower address */
+ reg_word_addr--;
+ phy_addr = 0x10 | ((reg_word_addr >> 5) & 0x7); /* bit7-5 of reg address */
+ phy_reg = (u8) (reg_word_addr & 0x1f); /* bit4-0 of reg address */
+ phy_val = (u16) (reg_val & 0xffff);
+ mdiobus_write(phydev->bus, phy_addr, phy_reg, phy_val);
+}
+
+static int ar8327n_phy_is_link_alive(struct phy_device *phydev, int phy_addr)
+{
+ u16 val;
+
+ val = mdiobus_read(phydev->bus, phy_addr, ATHR_PHY_SPEC_STATUS);
+
+ return !!(val & ATHR_STATUS_LINK_PASS);
+}
+
+static int ar8327n_phy_setup(struct phy_device *phydev)
+{
+ struct device_d *dev = &phydev->dev;
+ int phy_addr;
+
+ /* start auto negotiation on each phy */
+ for (phy_addr = 0; phy_addr < ATHR_PHY_MAX; phy_addr++) {
+ mdiobus_write(phydev->bus, phy_addr, ATHR_AUTONEG_ADVERT,
+ ATHR_ADVERTISE_ALL);
+
+ mdiobus_write(phydev->bus, phy_addr, ATHR_1000BASET_CONTROL,
+ ATHR_ADVERTISE_1000FULL);
+
+ /* Reset PHYs*/
+ mdiobus_write(phydev->bus, phy_addr, ATHR_PHY_CONTROL,
+ ATHR_CTRL_AUTONEGOTIATION_ENABLE
+ | ATHR_CTRL_SOFTWARE_RESET);
+ }
+
+ /*
+ * After the phy is reset, it takes a little while before
+ * it can respond properly.
+ */
+ mdelay(1000);
+
+ for (phy_addr = 0; phy_addr < ATHR_PHY_MAX; phy_addr++) {
+ int count;
+
+ for (count = 20; count > 0; count--) {
+ u16 val;
+ val = mdiobus_read(phydev->bus, phy_addr,
+ ATHR_PHY_CONTROL);
+
+ if (!(val & ATHR_CTRL_SOFTWARE_RESET))
+ break;
+
+ mdelay(150);
+ }
+
+ if (!count) {
+ dev_err(dev, "error: port %d, negotiation timeout.\n",
+ phy_addr);
+ return -ETIMEDOUT;
+ }
+ }
+
+ return 0;
+}
+
+static int ar8327n_get_link(struct phy_device *phydev)
+{
+ int phy_addr;
+ int live_links = 0;
+
+ for (phy_addr = 0; phy_addr < ATHR_PHY_MAX; phy_addr++) {
+ if (ar8327n_phy_is_link_alive(phydev, phy_addr))
+ live_links++;
+ }
+
+ return (live_links > 0);
+}
+
+static int ar8327n_config_init(struct phy_device *phydev)
+{
+ struct device_d *dev = &phydev->dev;
+ int phy_addr = 0;
+
+ if (phydev->interface != PHY_INTERFACE_MODE_RGMII_TXID)
+ return 0;
+
+ /* if using header for register configuration, we have to */
+ /* configure s17 register after frame transmission is enabled */
+
+ /* configure the RGMII */
+ ar8327n_reg_write(phydev, 0x624, 0x7f7f7f7f);
+ ar8327n_reg_write(phydev, 0x10, 0x40000000);
+ ar8327n_reg_write(phydev, 0x4, 0x07600000);
+ ar8327n_reg_write(phydev, 0xc, 0x01000000);
+ ar8327n_reg_write(phydev, 0x7c, 0x0000007e);
+
+ /* AR8327/AR8328 v1.0 fixup */
+ if ((ar8327n_reg_read(phydev, 0x0) & 0xffff) == 0x1201) {
+ dev_warn(dev, "warning: untested device. PHY v1.0\n");
+ for (phy_addr = 0x0; phy_addr <= ATHR_PHY_MAX; phy_addr++) {
+ /* For 100M waveform */
+ mdiobus_write(phydev->bus, phy_addr, 0x1d, 0x0);
+ mdiobus_write(phydev->bus, phy_addr, 0x1e, 0x02ea);
+ /* Turn On Gigabit Clock */
+ mdiobus_write(phydev->bus, phy_addr, 0x1d, 0x3d);
+ mdiobus_write(phydev->bus, phy_addr, 0x1e, 0x68a0);
+ }
+ }
+
+ /*
+ * set the WAN Port(Port1) Disable Mode so
+ * it can not receive or transmit any frames.
+ */
+ ar8327n_reg_write(phydev, 0x066c,
+ ar8327n_reg_read(phydev, 0x066c) & 0xfff8ffff);
+
+ ar8327n_phy_setup(phydev);
+
+ return 0;
+}
+
+static int ar8327n_read_status(struct phy_device *phydev)
+{
+ /* for GMAC0 we have only one static mode */
+ phydev->speed = SPEED_1000;
+ phydev->duplex = DUPLEX_FULL;
+ phydev->pause = phydev->asym_pause = 0;
+ phydev->link = ar8327n_get_link(phydev);
+ return 0;
+}
+
+static int ar8327n_config_aneg(struct phy_device *phydev)
+{
+ return 0;
+}
+
+static int ar8327n_aneg_done(struct phy_device *phydev)
+{
+ return BMSR_ANEGCOMPLETE;
+}
+
+static struct phy_driver ar8327n_driver[] = {
+{
+ /* QCA AR8327N */
+ .phy_id = 0x004dd034,
+ .phy_id_mask = 0xffffffef,
+ .drv.name = "QCA AR8327N switch",
+ .config_init = ar8327n_config_init,
+ .features = PHY_GBIT_FEATURES,
+ .config_aneg = &ar8327n_config_aneg,
+ .read_status = &ar8327n_read_status,
+ .aneg_done = &ar8327n_aneg_done,
+}};
+
+static int atheros_phy_init(void)
+{
+ return phy_drivers_register(ar8327n_driver,
+ ARRAY_SIZE(ar8327n_driver));
+}
+fs_initcall(atheros_phy_init);