[PATCH 1/3] net: ax88796c: ASIX AX88796C SPI Ethernet Adapter Driver

Łukasz Stelmach
2020-08-25T17:03:49Z

ASIX AX88796[1] is a versatile ethernet adapter chip, that can be
connected to a CPU with a 8/16-bit bus or with an SPI. This driver
supports SPI connection.

The driver has been ported from the vendor kernel for ARTIK5[2]
boards. Several changes were made to adapt it to the current kernel
which include:

+ updated DT configuration,
+ clock configuration moved to DT,
+ new timer, ethtool and gpio APIs
+ dev_* instead of pr_* and custom printk() wrappers.

[1] https://www.asix.com.tw/products.php?op=pItemdetail&PItemID=104;65;86&PLine=65
[2] https://git.tizen.org/cgit/profile/common/platform/kernel/linux-3.10-artik/

The other ax88796 driver is for NE2000 compatible AX88796L chip. These
chips are not compatible. Hence, two separate drivers are required.

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
drivers/net/ethernet/Kconfig | 1 +
drivers/net/ethernet/Makefile | 1 +
drivers/net/ethernet/asix/Kconfig | 20 +
drivers/net/ethernet/asix/Makefile | 6 +
drivers/net/ethernet/asix/ax88796c_ioctl.c | 293 +++++
drivers/net/ethernet/asix/ax88796c_ioctl.h | 21 +
drivers/net/ethernet/asix/ax88796c_main.c | 1373 ++++++++++++++++++++
drivers/net/ethernet/asix/ax88796c_main.h | 596 +++++++++
drivers/net/ethernet/asix/ax88796c_spi.c | 103 ++
drivers/net/ethernet/asix/ax88796c_spi.h | 67 +
10 files changed, 2481 insertions(+)
create mode 100644 drivers/net/ethernet/asix/Kconfig
create mode 100644 drivers/net/ethernet/asix/Makefile
create mode 100644 drivers/net/ethernet/asix/ax88796c_ioctl.c
create mode 100644 drivers/net/ethernet/asix/ax88796c_ioctl.h
create mode 100644 drivers/net/ethernet/asix/ax88796c_main.c
create mode 100644 drivers/net/ethernet/asix/ax88796c_main.h
create mode 100644 drivers/net/ethernet/asix/ax88796c_spi.c
create mode 100644 drivers/net/ethernet/asix/ax88796c_spi.h

diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index de50e8b9e656..f3b218e45ea5 100644
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -32,6 +32,7 @@ source "drivers/net/ethernet/apm/Kconfig"
source "drivers/net/ethernet/apple/Kconfig"
source "drivers/net/ethernet/aquantia/Kconfig"
source "drivers/net/ethernet/arc/Kconfig"
+source "drivers/net/ethernet/asix/Kconfig"
source "drivers/net/ethernet/atheros/Kconfig"
source "drivers/net/ethernet/aurora/Kconfig"
source "drivers/net/ethernet/broadcom/Kconfig"
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index f8f38dcb5f8a..9eb368d93607 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_NET_XGENE) += apm/
obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
obj-$(CONFIG_NET_VENDOR_AQUANTIA) += aquantia/
obj-$(CONFIG_NET_VENDOR_ARC) += arc/
+obj-$(CONFIG_NET_VENDOR_ASIX) += asix/
obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
obj-$(CONFIG_NET_VENDOR_AURORA) += aurora/
obj-$(CONFIG_NET_VENDOR_CADENCE) += cadence/
diff --git a/drivers/net/ethernet/asix/Kconfig b/drivers/net/ethernet/asix/Kconfig
new file mode 100644
index 000000000000..4b127a4a659a
--- /dev/null
+++ b/drivers/net/ethernet/asix/Kconfig
@@ -0,0 +1,20 @@
+#
+# Asix network device configuration
+#
+
+config NET_VENDOR_ASIX
+ bool "Asix devices"
+ depends on SPI
+ help
+ If you have a network (Ethernet) interface based on a chip from ASIX, say Y
+
+if NET_VENDOR_ASIX
+
+config SPI_AX88796C
+ tristate "Asix AX88796C-SPI support"
+ depends on SPI
+ depends on GPIOLIB
+ help
+ Say Y here if you intend to attach a Asix AX88796C as SPI mode
+
+endif # NET_VENDOR_ASIX
diff --git a/drivers/net/ethernet/asix/Makefile b/drivers/net/ethernet/asix/Makefile
new file mode 100644
index 000000000000..0bfbbb042634
--- /dev/null
+++ b/drivers/net/ethernet/asix/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the Asix network device drivers.
+#
+
+obj-$(CONFIG_SPI_AX88796C) += ax88796c.o
+ax88796c-y := ax88796c_main.o ax88796c_ioctl.o ax88796c_spi.o
diff --git a/drivers/net/ethernet/asix/ax88796c_ioctl.c b/drivers/net/ethernet/asix/ax88796c_ioctl.c
new file mode 100644
index 000000000000..eba361e2a8b7
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_ioctl.c
@@ -0,0 +1,293 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2010 ASIX Electronics Corporation
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd.
+ *
+ * ASIX AX88796C SPI Fast Ethernet Linux driver
+ */
+
+#include "ax88796c_main.h"
+#include "ax88796c_spi.h"
+#include "ax88796c_ioctl.h"
+
+u8 ax88796c_check_power(struct ax88796c_device *ax_local)
+{
+ struct spi_status ax_status;
+
+ /* Check media link status first */
+ if (netif_carrier_ok(ax_local->ndev) ||
+ (ax_local->ps_level == AX_PS_D0) ||
+ (ax_local->ps_level == AX_PS_D1)) {
+ return 0;
+ }
+
+ AX_READ_STATUS(&ax_local->ax_spi, &ax_status);
+ if (!(ax_status.status & AX_STATUS_READY))
+ return 1;
+
+ return 0;
+}
+
+u8 ax88796c_check_power_and_wake(struct ax88796c_device *ax_local)
+{
+ struct spi_status ax_status;
+ unsigned long start_time;
+
+ /* Check media link status first */
+ if (netif_carrier_ok(ax_local->ndev) ||
+ (ax_local->ps_level == AX_PS_D0) ||
+ (ax_local->ps_level == AX_PS_D1)) {
+ return 0;
+ }
+
+ AX_READ_STATUS(&ax_local->ax_spi, &ax_status);
+ if (!(ax_status.status & AX_STATUS_READY)) {
+
+ /* AX88796C in power saving mode */
+ AX_WAKEUP(&ax_local->ax_spi);
+
+ /* Check status */
+ start_time = jiffies;
+ do {
+ if (time_after(jiffies, start_time + HZ/2)) {
+ netdev_err(ax_local->ndev,
+ "timeout waiting for wakeup"
+ " from power saving\n");
+ break;
+ }
+
+ AX_READ_STATUS(&ax_local->ax_spi, &ax_status);
+
+ } while (!(ax_status.status & AX_STATUS_READY));
+
+ ax88796c_set_power_saving(ax_local, AX_PS_D0);
+
+ return 1;
+ }
+
+ return 0;
+}
+
+void ax88796c_set_power_saving(struct ax88796c_device *ax_local, u8 ps_level)
+{
+ u16 pmm;
+
+ if (ps_level == AX_PS_D1)
+ pmm = PSCR_PS_D1;
+ else if (ps_level == AX_PS_D2)
+ pmm = PSCR_PS_D2;
+ else
+ pmm = PSCR_PS_D0;
+
+ AX_WRITE(&ax_local->ax_spi, (AX_READ(&ax_local->ax_spi, P0_PSCR)
+ & PSCR_PS_MASK) | pmm, P0_PSCR);
+}
+
+int ax88796c_mdio_read(struct net_device *ndev, int phy_id, int loc)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ unsigned long start_time;
+
+ AX_WRITE(&ax_local->ax_spi, MDIOCR_RADDR(loc)
+ | MDIOCR_FADDR(phy_id) | MDIOCR_READ, P2_MDIOCR);
+
+ start_time = jiffies;
+ while ((AX_READ(&ax_local->ax_spi, P2_MDIOCR) & MDIOCR_VALID) == 0) {
+ if (time_after(jiffies, start_time + HZ/100))
+ return -EBUSY;
+ }
+
+ return AX_READ(&ax_local->ax_spi, P2_MDIODR);
+}
+
+void
+ax88796c_mdio_write(struct net_device *ndev, int phy_id, int loc, int val)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ unsigned long start_time;
+
+ AX_WRITE(&ax_local->ax_spi, val, P2_MDIODR);
+
+ AX_WRITE(&ax_local->ax_spi,
+ MDIOCR_RADDR(loc) | MDIOCR_FADDR(phy_id)
+ | MDIOCR_WRITE, P2_MDIOCR);
+
+ start_time = jiffies;
+ while ((AX_READ(&ax_local->ax_spi, P2_MDIOCR) & MDIOCR_VALID) == 0) {
+ if (time_after(jiffies, start_time + HZ/100))
+ return;
+ }
+
+ if (loc == MII_ADVERTISE) {
+ AX_WRITE(&ax_local->ax_spi, (BMCR_FULLDPLX | BMCR_ANRESTART |
+ BMCR_ANENABLE | BMCR_SPEED100), P2_MDIODR);
+ AX_WRITE(&ax_local->ax_spi, (MDIOCR_RADDR(MII_BMCR) |
+ MDIOCR_FADDR(phy_id) | MDIOCR_WRITE),
+ P2_MDIOCR);
+
+ start_time = jiffies;
+ while ((AX_READ(&ax_local->ax_spi, P2_MDIOCR)
+ & MDIOCR_VALID) == 0) {
+ if (time_after(jiffies, start_time + HZ/100))
+ return;
+ }
+ }
+}
+
+void ax88796c_set_csums(struct ax88796c_device *ax_local)
+{
+ if (ax_local->checksum & AX_RX_CHECKSUM) {
+ AX_WRITE(&ax_local->ax_spi, COERCR0_DEFAULT, P4_COERCR0);
+ AX_WRITE(&ax_local->ax_spi, COERCR1_DEFAULT, P4_COERCR1);
+ } else {
+ AX_WRITE(&ax_local->ax_spi, 0, P4_COERCR0);
+ AX_WRITE(&ax_local->ax_spi, 0, P4_COERCR1);
+ }
+
+ if (ax_local->checksum & AX_TX_CHECKSUM) {
+ AX_WRITE(&ax_local->ax_spi, COETCR0_DEFAULT, P4_COETCR0);
+ AX_WRITE(&ax_local->ax_spi, COETCR1_TXPPPE, P4_COETCR1);
+ } else {
+ AX_WRITE(&ax_local->ax_spi, 0, P4_COETCR0);
+ AX_WRITE(&ax_local->ax_spi, 0, P4_COETCR1);
+ }
+}
+
+static void ax88796c_get_drvinfo(struct net_device *ndev,
+ struct ethtool_drvinfo *info)
+{
+ /* Inherit standard device info */
+ strncpy(info->driver, DRV_NAME, sizeof(info->driver));
+ strncpy(info->version, DRV_VERSION, sizeof(info->version));
+}
+
+static u32 ax88796c_get_link(struct net_device *ndev)
+{
+ u32 link;
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ u8 power;
+
+ down(&ax_local->spi_lock);
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ link = mii_link_ok(&ax_local->mii);
+
+ if (power)
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+ up(&ax_local->spi_lock);
+
+ return link;
+
+
+}
+
+static u32 ax88796c_get_msglevel(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ return ax_local->msg_enable;
+}
+
+static void ax88796c_set_msglevel(struct net_device *ndev, u32 level)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ ax_local->msg_enable = level;
+}
+
+
+static int
+ax88796c_get_link_ksettings(struct net_device *ndev,
+ struct ethtool_link_ksettings *cmd)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ u8 power;
+
+ down(&ax_local->spi_lock);
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ mii_ethtool_get_link_ksettings(&ax_local->mii, cmd);
+
+ if (power)
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+ up(&ax_local->spi_lock);
+
+ return 0;
+}
+
+static int
+ax88796c_set_link_ksettings(struct net_device *ndev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ u8 power;
+
+ down(&ax_local->spi_lock);
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ mii_ethtool_set_link_ksettings(&ax_local->mii, cmd);
+
+ if (power)
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+ up(&ax_local->spi_lock);
+ return 0;
+
+}
+
+static int ax88796c_nway_reset(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ int ret;
+ u8 power;
+
+ down(&ax_local->spi_lock);
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ ret = mii_nway_restart(&ax_local->mii);
+
+ if (power)
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+ up(&ax_local->spi_lock);
+ return ret;
+}
+
+static u32 ax88796c_ethtool_getmsglevel(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ return ax_local->msg_enable;
+}
+
+static void ax88796c_ethtool_setmsglevel(struct net_device *ndev, u32 level)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ ax_local->msg_enable = level;
+}
+
+struct ethtool_ops ax88796c_ethtool_ops = {
+ .get_drvinfo = ax88796c_get_drvinfo,
+ .get_link = ax88796c_get_link,
+ .get_msglevel = ax88796c_get_msglevel,
+ .set_msglevel = ax88796c_set_msglevel,
+ .get_link_ksettings = ax88796c_get_link_ksettings,
+ .set_link_ksettings = ax88796c_set_link_ksettings,
+ .nway_reset = ax88796c_nway_reset,
+ .get_msglevel = ax88796c_ethtool_getmsglevel,
+ .set_msglevel = ax88796c_ethtool_setmsglevel,
+};
+
+int ax88796c_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ int ret;
+ u8 power;
+
+ down(&ax_local->spi_lock);
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ ret = generic_mii_ioctl(&ax_local->mii, if_mii(ifr), cmd, NULL);
+
+ if (power)
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+ up(&ax_local->spi_lock);
+
+ return ret;
+}
+
diff --git a/drivers/net/ethernet/asix/ax88796c_ioctl.h b/drivers/net/ethernet/asix/ax88796c_ioctl.h
new file mode 100644
index 000000000000..bafd573bd813
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_ioctl.h
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2010 ASIX Electronics Corporation
+ *
+ * ASIX AX88796C SPI Fast Ethernet Linux driver
+ */
+
+#ifndef _AX88796C_IOCTL_H
+#define _AX88796C_IOCTL_H
+
+extern struct ethtool_ops ax88796c_ethtool_ops;
+
+u8 ax88796c_check_power(struct ax88796c_device *ax_local);
+u8 ax88796c_check_power_and_wake(struct ax88796c_device *ax_local);
+void ax88796c_set_power_saving(struct ax88796c_device *ax_local, u8 ps_level);
+int ax88796c_mdio_read(struct net_device *dev, int phy_id, int loc);
+void ax88796c_mdio_write(struct net_device *dev, int phy_id, int loc, int val);
+void ax88796c_set_csums(struct ax88796c_device *ax_local);
+int ax88796c_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
+
+#endif
diff --git a/drivers/net/ethernet/asix/ax88796c_main.c b/drivers/net/ethernet/asix/ax88796c_main.c
new file mode 100644
index 000000000000..c28cfb931319
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_main.c
@@ -0,0 +1,1373 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2010 ASIX Electronics Corporation
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd.
+ *
+ * ASIX AX88796C SPI Fast Ethernet Linux driver
+ */
+
+#include "ax88796c_main.h"
+#include "ax88796c_ioctl.h"
+
+static int comp;
+static int ps_level = AX_PS_D0;
+static int msg_enable = NETIF_MSG_PROBE |
+ NETIF_MSG_LINK |
+ /* NETIF_MSG_TIMER | */
+ NETIF_MSG_RX_ERR |
+ NETIF_MSG_TX_ERR |
+ /* NETIF_MSG_TX_QUEUED | */
+ /* NETIF_MSG_INTR | */
+ /* NETIF_MSG_TX_DONE | */
+ /* NETIF_MSG_RX_STATUS | */
+ /* NETIF_MSG_PKTDATA | */
+ /* NETIF_MSG_HW | */
+ NETIF_MSG_WOL;
+
+module_param(comp, int, 0);
+MODULE_PARM_DESC(comp, "0=Non-Compression Mode, 1=Compression Mode");
+
+module_param(ps_level, int, 0);
+MODULE_PARM_DESC(ps_level,
+ "Power Saving Level (0:disable 1:level 1 2:level 2)");
+
+module_param(msg_enable, int, 0);
+MODULE_PARM_DESC(msg_enable, "Message mask (see linux/netdevice.h for bitmap)");
+
+static char *macaddr;
+module_param(macaddr, charp, 0);
+MODULE_PARM_DESC(macaddr, "MAC address");
+
+MODULE_AUTHOR("ASIX");
+MODULE_DESCRIPTION("ASIX AX88796C SPI Ethernet driver");
+MODULE_LICENSE("GPL");
+
+static void ax88796c_dump_regs(struct ax88796c_device *ax_local)
+{
+ struct net_device *ndev = ax_local->ndev;
+ u8 i, j;
+
+ netdev_info(ndev,
+ " Page0 Page1 Page2 Page3 "
+ "Page4 Page5 Page6 Page7\n");
+ for (i = 0; i < 0x20; i += 2) {
+ netdev_info(ndev, "0x%02x ", i);
+ for (j = 0; j < 8; j++) {
+ netdev_info(ndev, "0x%04x ",
+ AX_READ(&ax_local->ax_spi, j * 0x20 + i));
+ }
+ netdev_info(ndev, "\n");
+ }
+ netdev_info(ndev, "\n");
+}
+
+static void ax88796c_dump_phy_regs(struct ax88796c_device *ax_local)
+{
+ struct net_device *ndev = ax_local->ndev;
+ int i;
+
+ netdev_info(ndev, "Dump PHY registers:\n");
+ for (i = 0; i < 6; i++) {
+ netdev_info(ndev, " MR%d = 0x%04x\n", i,
+ ax88796c_mdio_read(ax_local->ndev,
+ ax_local->mii.phy_id, i));
+ }
+}
+
+static void ax88796c_watchdog(struct ax88796c_device *ax_local)
+{
+ struct net_device *ndev = ax_local->ndev;
+ u16 phy_status;
+ unsigned long time_to_chk = AX88796C_WATCHDOG_PERIOD;
+
+ if (ax88796c_check_power(ax_local)) {
+ mod_timer(&ax_local->watchdog, jiffies + time_to_chk);
+ return;
+ }
+
+ ax88796c_set_power_saving(ax_local, AX_PS_D0);
+
+ phy_status = AX_READ(&ax_local->ax_spi, P0_PSCR);
+ if (phy_status & PSCR_PHYLINK) {
+
+ ax_local->w_state = ax_nop;
+ time_to_chk = 0;
+
+ } else if (!(phy_status & PSCR_PHYCOFF)) {
+ /* The ethernet cable has been plugged */
+ if (ax_local->w_state == chk_cable) {
+ if (netif_msg_timer(ax_local))
+ netdev_info(ndev, "Cable connected\n");
+
+ ax_local->w_state = chk_link;
+ ax_local->w_ticks = 0;
+ } else {
+ if (netif_msg_timer(ax_local))
+ netdev_info(ndev, "Check media status\n");
+
+ if (++ax_local->w_ticks == AX88796C_WATCHDOG_RESTART) {
+ if (netif_msg_timer(ax_local))
+ netdev_info(ndev, "Restart autoneg\n");
+ ax88796c_mdio_write(ndev,
+ ax_local->mii.phy_id, MII_BMCR,
+ (BMCR_SPEED100 | BMCR_ANENABLE |
+ BMCR_ANRESTART));
+
+ if (netif_msg_hw(ax_local))
+ ax88796c_dump_phy_regs(ax_local);
+ ax_local->w_ticks = 0;
+ }
+ }
+ } else {
+ if (netif_msg_timer(ax_local))
+ netdev_info(ndev, "Check cable status\n");
+
+ ax_local->w_state = chk_cable;
+ }
+
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+
+ if (time_to_chk)
+ mod_timer(&ax_local->watchdog, jiffies + time_to_chk);
+}
+
+static void ax88796c_watchdog_timer(struct timer_list *t)
+{
+ struct ax88796c_device *ax_local = from_timer(ax_local, t, watchdog);
+ //struct net_device *ndev = ax_local->ndev;
+
+ set_bit(EVENT_WATCHDOG, &ax_local->flags);
+ queue_work(ax_local->ax_work_queue, &ax_local->ax_work);
+}
+
+static int ax88796c_soft_reset(struct ax88796c_device *ax_local)
+{
+ unsigned long start;
+ u16 temp;
+
+ AX_WRITE(&ax_local->ax_spi, PSR_RESET, P0_PSR);
+ AX_WRITE(&ax_local->ax_spi, PSR_RESET_CLR, P0_PSR);
+
+ start = jiffies;
+ while (!(AX_READ(&ax_local->ax_spi, P0_PSR) & PSR_DEV_READY)) {
+ if (time_after(jiffies, start + (160 * HZ / 1000))) {
+ dev_err(&ax_local->spi->dev,
+ "timeout waiting for reset completion\n");
+ return -1;
+ }
+ }
+
+ temp = AX_READ(&ax_local->ax_spi, P4_SPICR);
+ if (ax_local->capabilities & AX_CAP_COMP) {
+ AX_WRITE(&ax_local->ax_spi,
+ (temp | SPICR_RCEN | SPICR_QCEN), P4_SPICR);
+ ax_local->ax_spi.comp = 1;
+ } else {
+ AX_WRITE(&ax_local->ax_spi,
+ (temp & ~(SPICR_RCEN | SPICR_QCEN)), P4_SPICR);
+ ax_local->ax_spi.comp = 0;
+ }
+
+ return 0;
+}
+
+static int ax88796c_reload_eeprom(struct ax88796c_device *ax_local)
+{
+ unsigned long start;
+
+ AX_WRITE(&ax_local->ax_spi, EECR_RELOAD, P3_EECR);
+
+ start = jiffies;
+ while (!(AX_READ(&ax_local->ax_spi, P0_PSR) & PSR_DEV_READY)) {
+ if (time_after(jiffies, start + (2 * HZ / 100))) {
+ dev_err(&ax_local->spi->dev,
+ "timeout waiting for reload eeprom\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static void ax88796c_set_hw_multicast(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ u16 rx_ctl = RXCR_AB;
+ int mc_count = netdev_mc_count(ndev);
+
+ memset(ax_local->multi_filter, 0, AX_MCAST_FILTER_SIZE);
+
+ if (ndev->flags & IFF_PROMISC) {
+ rx_ctl |= RXCR_PRO;
+
+ } else if (ndev->flags & IFF_ALLMULTI
+ || mc_count > AX_MAX_MCAST) {
+ rx_ctl |= RXCR_AMALL;
+
+ } else if (mc_count == 0) {
+ /* just broadcast and directed */
+ } else {
+ u32 crc_bits;
+ int i;
+ struct netdev_hw_addr *ha;
+ netdev_for_each_mc_addr(ha, ndev) {
+ crc_bits = ether_crc(ETH_ALEN, ha->addr);
+ ax_local->multi_filter[crc_bits >> 29] |=
+ (1 << ((crc_bits >> 26) & 7));
+ }
+
+ for (i = 0; i < 4; i++) {
+ AX_WRITE(&ax_local->ax_spi,
+ ((ax_local->multi_filter[i*2+1] << 8) |
+ ax_local->multi_filter[i*2]), P3_MFAR(i));
+
+ }
+ }
+
+ AX_WRITE(&ax_local->ax_spi, rx_ctl, P2_RXCR);
+
+}
+
+#if 0
+static void ax88796c_set_multicast(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+
+ set_bit(EVENT_SET_MULTI, &ax_local->flags);
+ queue_work(ax_local->ax_work_queue, &ax_local->ax_work);
+}
+#endif
+
+static void ax88796c_set_mac_addr(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+
+ AX_WRITE(&ax_local->ax_spi, ((u16)(ndev->dev_addr[4] << 8) |
+ (u16)ndev->dev_addr[5]), P3_MACASR0);
+ AX_WRITE(&ax_local->ax_spi, ((u16)(ndev->dev_addr[2] << 8) |
+ (u16)ndev->dev_addr[3]), P3_MACASR1);
+ AX_WRITE(&ax_local->ax_spi, ((u16)(ndev->dev_addr[0] << 8) |
+ (u16)ndev->dev_addr[1]), P3_MACASR2);
+}
+
+static int ax88796c_set_mac_address(struct net_device *ndev, void *p)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ struct sockaddr *addr = p;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
+
+ down(&ax_local->spi_lock);
+
+ ax88796c_set_mac_addr(ndev);
+
+ up(&ax_local->spi_lock);
+
+ return 0;
+}
+
+static int ax88796c_load_mac_addr(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ u16 temp;
+
+ /* Read the MAC address from AX88796C */
+ temp = AX_READ(&ax_local->ax_spi, P3_MACASR0);
+ ndev->dev_addr[5] = (u8)temp;
+ ndev->dev_addr[4] = (u8)(temp >> 8);
+
+ temp = AX_READ(&ax_local->ax_spi, P3_MACASR1);
+ ndev->dev_addr[3] = (u8)temp;
+ ndev->dev_addr[2] = (u8)(temp >> 8);
+
+ temp = AX_READ(&ax_local->ax_spi, P3_MACASR2);
+ ndev->dev_addr[1] = (u8)temp;
+ ndev->dev_addr[0] = (u8)(temp >> 8);
+
+ /* Supported for no EEPROM */
+ if (!is_valid_ether_addr(ndev->dev_addr)) {
+ if (macaddr && mac_pton(macaddr, ndev->dev_addr))
+ return 0;
+
+ if (netif_msg_probe(ax_local))
+ dev_info(&ax_local->spi->dev, "Use random MAC address\n");
+
+ random_ether_addr(ndev->dev_addr);
+ }
+
+ return 0;
+}
+
+static void ax88796c_proc_tx_hdr(struct tx_pkt_info *info, u8 ip_summed)
+{
+ u16 pkt_len_bar = (~info->pkt_len & TX_HDR_SOP_PKTLENBAR);
+
+ /* Prepare SOP header */
+ info->sop.flags_len = info->pkt_len |
+ (ip_summed == CHECKSUM_NONE ? TX_HDR_SOP_DICF : 0);
+
+ info->sop.seq_lenbar = ((info->seq_num << 11) & TX_HDR_SOP_SEQNUM)
+ | pkt_len_bar;
+ cpu_to_be16s(&info->sop.flags_len);
+ cpu_to_be16s(&info->sop.seq_lenbar);
+
+ /* Prepare Segment header */
+ info->seg.flags_seqnum_seglen = TX_HDR_SEG_FS | TX_HDR_SEG_LS
+ | info->pkt_len;
+
+ info->seg.eo_so_seglenbar = pkt_len_bar;
+
+ cpu_to_be16s(&info->seg.flags_seqnum_seglen);
+ cpu_to_be16s(&info->seg.eo_so_seglenbar);
+
+ /* Prepare EOP header */
+ info->eop.seq_len = ((info->seq_num << 11) &
+ TX_HDR_EOP_SEQNUM) | info->pkt_len;
+ info->eop.seqbar_lenbar = ((~info->seq_num << 11) &
+ TX_HDR_EOP_SEQNUMBAR) | pkt_len_bar;
+
+ cpu_to_be16s(&info->eop.seq_len);
+ cpu_to_be16s(&info->eop.seqbar_lenbar);
+}
+
+static int
+ax88796c_check_free_pages(struct ax88796c_device *ax_local, u8 need_pages)
+{
+ u8 free_pages;
+ u16 tmp;
+
+ free_pages = AX_READ(&ax_local->ax_spi, P0_TFBFCR) & TX_FREEBUF_MASK;
+ if (free_pages < need_pages) {
+ /* schedule free page interrupt */
+ tmp = AX_READ(&ax_local->ax_spi, P0_TFBFCR)
+ & TFBFCR_SCHE_FREE_PAGE;
+ AX_WRITE(&ax_local->ax_spi, tmp | TFBFCR_TX_PAGE_SET |
+ TFBFCR_SET_FREE_PAGE(need_pages),
+ P0_TFBFCR);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static struct sk_buff *
+ax88796c_tx_fixup(struct net_device *ndev, struct sk_buff_head *q)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ struct sk_buff *skb, *tx_skb;
+ struct tx_pkt_info *info;
+ struct skb_data *entry;
+ int headroom;
+ int tailroom;
+ u8 need_pages;
+ u16 tol_len, pkt_len;
+ u8 padlen, seq_num;
+ u8 spi_len = ax_local->ax_spi.comp ? 1 : 4;
+
+ if (skb_queue_empty(q))
+ return NULL;
+
+ skb = skb_peek(q);
+ pkt_len = skb->len;
+ need_pages = (pkt_len + TX_OVERHEAD + 127) >> 7;
+ if (ax88796c_check_free_pages(ax_local, need_pages) != 0)
+ return NULL;
+
+ headroom = skb_headroom(skb);
+ tailroom = skb_tailroom(skb);
+ padlen = ((pkt_len + 3) & 0x7FC) - pkt_len;
+ tol_len = ((pkt_len + 3) & 0x7FC) +
+ TX_OVERHEAD + TX_EOP_SIZE + spi_len;
+ seq_num = ++ax_local->seq_num & 0x1F;
+
+ info = (struct tx_pkt_info *) skb->cb;
+ info->pkt_len = pkt_len;
+
+ if ((!skb_cloned(skb)) &&
+ (headroom >= (TX_OVERHEAD + spi_len)) &&
+ (tailroom >= (padlen + TX_EOP_SIZE))) {
+
+ info->seq_num = seq_num;
+ ax88796c_proc_tx_hdr(info, skb->ip_summed);
+
+ /* SOP and SEG header */
+ memcpy(skb_push(skb, TX_OVERHEAD), &info->sop, TX_OVERHEAD);
+
+ /* Write SPI TXQ header */
+ memcpy(skb_push(skb, spi_len), tx_cmd_buf, spi_len);
+
+ /* Make 32-bit aligment */
+ skb_put(skb, padlen);
+
+ /* EOP header */
+ memcpy(skb_put(skb, TX_EOP_SIZE), &info->eop, TX_EOP_SIZE);
+
+ tx_skb = skb;
+ skb_unlink(skb, q);
+
+ } else {
+
+ tx_skb = alloc_skb(tol_len, GFP_KERNEL);
+ if (!tx_skb)
+ return NULL;
+
+ /* Write SPI TXQ header */
+ memcpy(skb_put(tx_skb, spi_len), tx_cmd_buf, spi_len);
+
+ info->seq_num = seq_num;
+ ax88796c_proc_tx_hdr(info, skb->ip_summed);
+
+ /* SOP and SEG header */
+ memcpy(skb_put(tx_skb, TX_OVERHEAD),
+ &info->sop, TX_OVERHEAD);
+
+ /* Packet */
+ memcpy(skb_put(tx_skb, ((pkt_len + 3) & 0xFFFC)),
+ skb->data, pkt_len);
+
+ /* EOP header */
+ memcpy(skb_put(tx_skb, TX_EOP_SIZE),
+ &info->eop, TX_EOP_SIZE);
+
+ skb_unlink(skb, q);
+ dev_kfree_skb(skb);
+ }
+
+ entry = (struct skb_data *) tx_skb->cb;
+ memset(entry, 0, sizeof(*entry));
+ entry->len = pkt_len;
+
+ if (netif_msg_pktdata(ax_local)) {
+ int loop;
+ netdev_info(ndev, "TX packet len %d, total len %d, seq %d\n",
+ pkt_len, tx_skb->len, seq_num);
+
+ netdev_info(ndev, " Dump SPI Header:\n ");
+ for (loop = 0; loop < 4; loop++)
+ netdev_info(ndev, "%02x ", *(tx_skb->data + loop));
+
+ netdev_info(ndev, "\n");
+
+ netdev_info(ndev, " Dump TX SOP:\n ");
+ for (loop = 0; loop < TX_OVERHEAD; loop++)
+ netdev_info(ndev, "%02x ", *(tx_skb->data + 4 + loop));
+
+ netdev_info(ndev, "\n");
+
+ netdev_info(ndev, " Dump TX packet:");
+ for (loop = TX_OVERHEAD + 4;
+ loop < (tx_skb->len - TX_EOP_SIZE); loop++) {
+ if (((loop + 8) % 16) == 0)
+ netdev_info(ndev, "\n ");
+ netdev_info(ndev, "%02x ", *(tx_skb->data + loop));
+ }
+ netdev_info(ndev, "\n");
+
+ netdev_info(ndev, " Dump TX EOP:\n %02x %02x %02x %02x\n",
+ *(tx_skb->data + tx_skb->len - 4),
+ *(tx_skb->data + tx_skb->len - 3),
+ *(tx_skb->data + tx_skb->len - 2),
+ *(tx_skb->data + tx_skb->len - 1));
+ }
+
+ return tx_skb;
+}
+
+static int ax88796c_hard_xmit(struct ax88796c_device *ax_local)
+{
+ struct sk_buff *tx_skb;
+ struct skb_data *entry;
+
+ tx_skb = ax88796c_tx_fixup(ax_local->ndev, &ax_local->tx_wait_q);
+
+ if (!tx_skb)
+ return 0;
+
+ entry = (struct skb_data *)tx_skb->cb;
+
+ AX_WRITE(&ax_local->ax_spi,
+ (TSNR_TXB_START | TSNR_PKT_CNT(1)), P0_TSNR);
+
+ axspi_write_txq(&ax_local->ax_spi, tx_skb->data, tx_skb->len);
+
+ if (((AX_READ(&ax_local->ax_spi, P0_TSNR) & TXNR_TXB_IDLE) == 0) ||
+ ((ISR_TXERR & AX_READ(&ax_local->ax_spi, P0_ISR)) != 0)) {
+
+ /* Ack tx error int */
+ AX_WRITE(&ax_local->ax_spi, ISR_TXERR, P0_ISR);
+
+ ax_local->stats.tx_dropped++;
+
+ if (netif_msg_tx_err(ax_local))
+ netdev_err(ax_local->ndev,
+ "TX FIFO error, re-initialize the TX bridge\n");
+
+ /* Reinitial tx bridge */
+ AX_WRITE(&ax_local->ax_spi, TXNR_TXB_REINIT |
+ AX_READ(&ax_local->ax_spi, P0_TSNR), P0_TSNR);
+ ax_local->seq_num = 0;
+ } else {
+ ax_local->stats.tx_packets++;
+ ax_local->stats.tx_bytes += entry->len;
+ }
+
+ entry->state = tx_done;
+ dev_kfree_skb(tx_skb);
+
+ return 1;
+}
+
+static int
+ax88796c_start_xmit(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+
+ skb_queue_tail(&ax_local->tx_wait_q, skb);
+ if (skb_queue_len(&ax_local->tx_wait_q) > TX_QUEUE_HIGH_WATER) {
+ if (netif_msg_tx_queued(ax_local))
+ netdev_err(ndev, "Too much TX packets in queue %d\n",
+ skb_queue_len(&ax_local->tx_wait_q));
+
+ netif_stop_queue(ndev);
+ }
+
+ set_bit(EVENT_TX, &ax_local->flags);
+ queue_work(ax_local->ax_work_queue, &ax_local->ax_work);
+
+ return NETDEV_TX_OK;
+
+}
+
+
+static inline void
+ax88796c_skb_return(struct ax88796c_device *ax_local, struct sk_buff *skb,
+ struct rx_header *rxhdr)
+{
+ struct net_device *ndev = ax_local->ndev;
+ int status;
+
+ do {
+ if (!(ax_local->checksum & AX_RX_CHECKSUM))
+ break;
+
+ /* checksum error bit is set */
+ if ((rxhdr->flags & RX_HDR3_L3_ERR) ||
+ (rxhdr->flags & RX_HDR3_L4_ERR))
+ break;
+
+ if ((rxhdr->flags & RX_HDR3_L4_TYPE_TCP) ||
+ (rxhdr->flags & RX_HDR3_L4_TYPE_UDP)) {
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ }
+ } while (0);
+
+ ax_local->stats.rx_packets++;
+ ax_local->stats.rx_bytes += skb->len;
+ skb->dev = ndev;
+
+ skb->truesize = skb->len + sizeof(struct sk_buff);
+ skb->protocol = eth_type_trans(skb, ax_local->ndev);
+
+ if (netif_msg_rx_status(ax_local))
+ netdev_info(ndev, "< rx, len %zu, type 0x%x\n",
+ skb->len + sizeof(struct ethhdr), skb->protocol);
+
+ status = netif_rx(skb);
+ if (status != NET_RX_SUCCESS && netif_msg_rx_err(ax_local))
+ netdev_info(ndev, "netif_rx status %d\n", status);
+}
+
+static void dump_packet(struct net_device *ndev, const char *msg, int len, const char *data)
+{
+ netdev_printk(KERN_DEBUG, ndev, DRV_NAME ": %s - packet len:%d\n", msg, len);
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 1,
+ data, len, true);
+}
+
+static void
+ax88796c_rx_fixup(struct ax88796c_device *ax_local, struct sk_buff *rx_skb)
+{
+ struct rx_header *rxhdr = (struct rx_header *) rx_skb->data;
+ struct net_device *ndev = ax_local->ndev;
+ u16 len;
+
+ be16_to_cpus(&rxhdr->flags_len);
+ be16_to_cpus(&rxhdr->seq_lenbar);
+ be16_to_cpus(&rxhdr->flags);
+
+ if ((((short)rxhdr->flags_len) & RX_HDR1_PKT_LEN) !=
+ (~((short)rxhdr->seq_lenbar) & 0x7FF)) {
+ if (netif_msg_rx_err(ax_local)) {
+ int i;
+ netdev_err(ndev, "Header error\n");
+ //netdev_err(ndev, "Dump received frame\n");
+ /* for (i = 0; i < rx_skb->len; i++) { */
+ /* netdev_err(ndev, "%02x ", */
+ /* *(rx_skb->data + i)); */
+ /* if (((i + 1) % 16) == 0) */
+ /* netdev_err(ndev, "\n"); */
+ /* } */
+ dump_packet(ndev, __func__, rx_skb->len, rx_skb->data);
+ }
+ ax_local->stats.rx_frame_errors++;
+ kfree_skb(rx_skb);
+ return;
+ }
+
+ if ((rxhdr->flags_len & RX_HDR1_MII_ERR) ||
+ (rxhdr->flags_len & RX_HDR1_CRC_ERR)) {
+ if (netif_msg_rx_err(ax_local))
+ netdev_err(ndev, "CRC or MII error\n");
+
+ ax_local->stats.rx_crc_errors++;
+ kfree_skb(rx_skb);
+ return;
+ }
+
+ len = rxhdr->flags_len & RX_HDR1_PKT_LEN;
+ if (netif_msg_pktdata(ax_local)) {
+ int loop;
+ netdev_info(ndev, "RX data, total len %d, packet len %d\n",
+ rx_skb->len, len);
+
+ netdev_info(ndev, " Dump RX packet header:\n ");
+ for (loop = 0; loop < sizeof(*rxhdr); loop++)
+ netdev_info(ndev, "%02x ", *(rx_skb->data + loop));
+
+ netdev_info(ndev, "\n Dump RX packet:");
+ for (loop = 0; loop < len; loop++) {
+ if ((loop % 16) == 0)
+ netdev_info(ndev, "\n ");
+ netdev_info(ndev, "%02x ",
+ *(rx_skb->data + loop + sizeof(*rxhdr)));
+ }
+ netdev_info(ndev, "\n");
+ }
+
+ skb_pull(rx_skb, sizeof(*rxhdr));
+ __pskb_trim(rx_skb, len);
+
+ return ax88796c_skb_return(ax_local, rx_skb, rxhdr);
+}
+
+static int ax88796c_receive(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ struct sk_buff *skb;
+ struct skb_data *entry;
+ u16 w_count, pkt_len;
+ u8 pkt_cnt;
+
+ /* check rx packet and total word count */
+ AX_WRITE(&ax_local->ax_spi, AX_READ(&ax_local->ax_spi, P0_RTWCR)
+ | RTWCR_RX_LATCH, P0_RTWCR);
+
+ pkt_cnt = AX_READ(&ax_local->ax_spi, P0_RXBCR2) & RXBCR2_PKT_MASK;
+ if (!pkt_cnt)
+ return 0;
+
+ pkt_len = AX_READ(&ax_local->ax_spi, P0_RCPHR) & 0x7FF;
+
+ w_count = ((pkt_len + 6 + 3) & 0xFFFC) >> 1;
+
+ skb = alloc_skb((w_count * 2), GFP_KERNEL);
+ if (!skb) {
+ if (netif_msg_rx_err(ax_local))
+ netdev_err(ndev,
+ "Couldn't allocate a sk_buff of size %d\n",
+ w_count * 2);
+
+ AX_WRITE(&ax_local->ax_spi, RXBCR1_RXB_DISCARD, P0_RXBCR1);
+ return 0;
+ }
+ entry = (struct skb_data *) skb->cb;
+
+ AX_WRITE(&ax_local->ax_spi, RXBCR1_RXB_START | w_count, P0_RXBCR1);
+
+ axspi_read_rxq(&ax_local->ax_spi,
+ skb_put(skb, w_count * 2), skb->len);
+
+ /* Check if rx bridge is idle */
+ if ((AX_READ(&ax_local->ax_spi, P0_RXBCR2) & RXBCR2_RXB_IDLE) == 0) {
+
+ if (netif_msg_rx_err(ax_local))
+ netdev_err(ndev, "Rx Bridge is not idle\n");
+ AX_WRITE(&ax_local->ax_spi, RXBCR2_RXB_REINIT, P0_RXBCR2);
+
+ entry->state = rx_err;
+
+ } else {
+
+ entry->state = rx_done;
+ }
+
+ AX_WRITE(&ax_local->ax_spi, ISR_RXPKT, P0_ISR);
+
+ ax88796c_rx_fixup(ax_local, skb);
+
+ return 1;
+}
+
+static void ax88796c_check_media(struct ax88796c_device *ax_local)
+{
+ struct net_device *ndev = ax_local->ndev;
+ u16 bmsr, bmcr;
+
+ if (netif_msg_hw(ax_local))
+ ax88796c_dump_phy_regs(ax_local);
+
+ bmsr = ax88796c_mdio_read(ndev,
+ ax_local->mii.phy_id, MII_BMSR);
+
+ if (!(bmsr & BMSR_LSTATUS) && netif_carrier_ok(ndev)) {
+
+ netif_carrier_off(ndev);
+ if (netif_msg_link(ax_local))
+ netdev_info(ndev, "link down\n");
+
+ ax_local->w_state = chk_cable;
+ mod_timer(&ax_local->watchdog,
+ jiffies + AX88796C_WATCHDOG_PERIOD);
+
+ } else if ((bmsr & BMSR_LSTATUS) &&
+ !netif_carrier_ok(ndev)) {
+ bmcr = ax88796c_mdio_read(ndev,
+ ax_local->mii.phy_id, MII_BMCR);
+ if (netif_msg_link(ax_local))
+ netdev_info(ndev, "link up, %sMbps, %s-duplex\n",
+ (bmcr & BMCR_SPEED100) ? "100" : "10",
+ (bmcr & BMCR_FULLDPLX) ? "full" : "half");
+
+ netif_carrier_on(ndev);
+ }
+
+ return;
+}
+
+static int ax88796c_process_isr(struct ax88796c_device *ax_local)
+{
+ u16 isr;
+ u8 done = 0;
+ struct net_device *ndev = ax_local->ndev;
+
+ isr = AX_READ(&ax_local->ax_spi, P0_ISR);
+ AX_WRITE(&ax_local->ax_spi, isr, P0_ISR);
+
+ if (netif_msg_intr(ax_local))
+ netdev_info(ndev, " ISR 0x%04x\n", isr);
+
+ if (isr & ISR_TXERR) {
+ if (netif_msg_intr(ax_local))
+ netdev_info(ndev, " TXERR interrupt\n");
+ AX_WRITE(&ax_local->ax_spi, TXNR_TXB_REINIT, P0_TSNR);
+ ax_local->seq_num = 0x1f;
+ }
+
+ if (isr & ISR_TXPAGES) {
+
+ if (netif_msg_intr(ax_local))
+ netdev_info(ndev, " TXPAGES interrupt\n");
+
+ set_bit(EVENT_TX, &ax_local->flags);
+ }
+
+ if (isr & ISR_LINK) {
+
+ if (netif_msg_intr(ax_local))
+ netdev_info(ndev, " Link change interrupt\n");
+
+ ax88796c_check_media(ax_local);
+ }
+
+ if (isr & ISR_RXPKT) {
+
+ if (netif_msg_intr(ax_local))
+ netdev_info(ndev, " RX interrupt\n");
+
+ done = ax88796c_receive(ax_local->ndev);
+ }
+
+ return done;
+}
+
+static irqreturn_t ax88796c_interrupt(int irq, void *dev_instance)
+{
+ struct net_device *ndev = dev_instance;
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+
+ if (ndev == NULL) {
+ pr_err("irq %d for unknown device.\n", irq);
+ return IRQ_RETVAL(0);
+ }
+
+ disable_irq_nosync(irq);
+
+ if (netif_msg_intr(ax_local))
+ netdev_info(ndev, "Interrupt occurred\n");
+
+ set_bit(EVENT_INTR, &ax_local->flags);
+ queue_work(ax_local->ax_work_queue, &ax_local->ax_work);
+
+ return IRQ_HANDLED;
+}
+
+
+static void ax88796c_work(struct work_struct *work)
+{
+ struct ax88796c_device *ax_local =
+ container_of(work, struct ax88796c_device, ax_work);
+ u8 power = 0;
+
+ down(&ax_local->spi_lock);
+
+ if (test_bit(EVENT_WATCHDOG, &ax_local->flags)) {
+
+ ax88796c_watchdog(ax_local);
+
+ clear_bit(EVENT_WATCHDOG, &ax_local->flags);
+ }
+
+ if (test_bit(EVENT_SET_MULTI, &ax_local->flags)) {
+
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ ax88796c_set_hw_multicast(ax_local->ndev);
+ clear_bit(EVENT_SET_MULTI, &ax_local->flags);
+ }
+
+ if (test_bit(EVENT_INTR, &ax_local->flags)) {
+
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ AX_WRITE(&ax_local->ax_spi, IMR_MASKALL, P0_IMR);
+
+ while (1) {
+ if (!ax88796c_process_isr(ax_local))
+ break;
+ }
+
+ clear_bit(EVENT_INTR, &ax_local->flags);
+
+ AX_WRITE(&ax_local->ax_spi, IMR_DEFAULT, P0_IMR);
+
+ enable_irq(ax_local->ndev->irq);
+ }
+
+ if (test_bit(EVENT_TX, &ax_local->flags)) {
+
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ while (skb_queue_len(&ax_local->tx_wait_q)) {
+ if (!ax88796c_hard_xmit(ax_local))
+ break;
+ }
+
+ clear_bit(EVENT_TX, &ax_local->flags);
+
+ if (netif_queue_stopped(ax_local->ndev) &&
+ (skb_queue_len(&ax_local->tx_wait_q) < TX_QUEUE_LOW_WATER))
+ netif_wake_queue(ax_local->ndev);
+ }
+
+ if (power)
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+
+ up(&ax_local->spi_lock);
+}
+
+static struct net_device_stats *ax88796c_get_stats(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ return &ax_local->stats;
+}
+
+void ax88796c_phy_init(struct ax88796c_device *ax_local)
+{
+ u16 advertise = ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP;
+
+ /* Setup LED mode */
+ AX_WRITE(&ax_local->ax_spi,
+ (LCR_LED0_EN | LCR_LED0_DUPLEX | LCR_LED1_EN |
+ LCR_LED1_100MODE), P2_LCR0);
+ AX_WRITE(&ax_local->ax_spi,
+ (AX_READ(&ax_local->ax_spi, P2_LCR1) & LCR_LED2_MASK) |
+ LCR_LED2_EN | LCR_LED2_LINK, P2_LCR1);
+
+ /* Enable PHY auto-polling */
+ AX_WRITE(&ax_local->ax_spi,
+ POOLCR_PHYID(ax_local->mii.phy_id) | POOLCR_POLL_EN |
+ POOLCR_POLL_FLOWCTRL | POOLCR_POLL_BMCR, P2_POOLCR);
+
+ ax88796c_mdio_write(ax_local->ndev,
+ ax_local->mii.phy_id, MII_ADVERTISE, advertise);
+
+ ax88796c_mdio_write(ax_local->ndev, ax_local->mii.phy_id, MII_BMCR,
+ BMCR_SPEED100 | BMCR_ANENABLE | BMCR_ANRESTART);
+}
+
+static int
+ax88796c_open(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ int ret;
+ u8 power;
+ unsigned long irq_flag = IRQF_SHARED;
+
+ netif_carrier_off(ax_local->ndev);
+
+ down(&ax_local->spi_lock);
+
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ ret = ax88796c_soft_reset(ax_local);
+ if (ret < 0) {
+ return -ENODEV;
+ }
+
+ ret = request_irq(ndev->irq, ax88796c_interrupt,
+ irq_flag, ndev->name, ndev);
+ if (ret) {
+ netdev_err(ndev, "unable to get IRQ %d (errno=%d).\n",
+ ndev->irq, ret);
+ return -ENXIO;
+ }
+
+ ax_local->seq_num = 0x1f;
+
+ ax88796c_set_mac_addr(ndev);
+ ax88796c_set_csums(ax_local);
+
+ /* Disable stuffing packet */
+ AX_WRITE(&ax_local->ax_spi,
+ AX_READ(&ax_local->ax_spi, P1_RXBSPCR)
+ & ~RXBSPCR_STUF_ENABLE, P1_RXBSPCR);
+
+ /* Enable RX packet process */
+ AX_WRITE(&ax_local->ax_spi, RPPER_RXEN, P1_RPPER);
+
+ AX_WRITE(&ax_local->ax_spi, AX_READ(&ax_local->ax_spi, P0_FER)
+ | FER_RXEN | FER_TXEN | FER_BSWAP | FER_IRQ_PULL, P0_FER);
+
+ ax88796c_phy_init(ax_local);
+
+ netif_start_queue(ndev);
+
+ AX_WRITE(&ax_local->ax_spi, IMR_DEFAULT, P0_IMR);
+
+ if (netif_msg_hw(ax_local)) {
+ netdev_info(ndev,
+ "Dump all MAC registers after initialization:\n");
+ ax88796c_dump_regs(ax_local);
+ ax88796c_dump_phy_regs(ax_local);
+ }
+
+ if (power)
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+
+ spi_message_init(&ax_local->ax_spi.rx_msg);
+
+ up(&ax_local->spi_lock);
+
+ timer_setup(&ax_local->watchdog, ax88796c_watchdog_timer, 0);
+ /* init_timer(&ax_local->watchdog); */
+ /* ax_local->watchdog.function = &ax88796c_watchdog_timer; */
+ /* ax_local->watchdog.data = (unsigned long) ndev; */
+ ax_local->watchdog.expires = jiffies + AX88796C_WATCHDOG_PERIOD;
+ ax_local->w_state = chk_cable;
+ ax_local->w_ticks = 0;
+
+ add_timer(&ax_local->watchdog);
+
+ return 0;
+}
+
+static void ax88796c_free_skb_queue(struct sk_buff_head *q)
+{
+ struct sk_buff *skb;
+
+ while (q->qlen) {
+ skb = skb_dequeue(q);
+ kfree_skb(skb);
+ }
+}
+
+static int
+ax88796c_close(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ u8 power;
+
+ netif_stop_queue(ndev);
+
+ del_timer_sync(&ax_local->watchdog);
+
+ free_irq(ndev->irq, ndev);
+
+ down(&ax_local->spi_lock);
+
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ AX_WRITE(&ax_local->ax_spi, IMR_MASKALL, P0_IMR);
+ ax88796c_free_skb_queue(&ax_local->tx_wait_q);
+
+ ax88796c_soft_reset(ax_local);
+
+ if (power)
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+
+ up(&ax_local->spi_lock);
+
+ return 0;
+}
+
+static const struct net_device_ops ax88796c_netdev_ops = {
+ .ndo_open = ax88796c_open,
+ .ndo_stop = ax88796c_close,
+ .ndo_start_xmit = ax88796c_start_xmit,
+ .ndo_get_stats = ax88796c_get_stats,
+ /* .ndo_set_multicast_list = ax88796c_set_multicast, */
+ .ndo_do_ioctl = ax88796c_ioctl,
+ .ndo_set_mac_address = ax88796c_set_mac_address,
+};
+
+
+static int ax88796c_hard_reset(struct ax88796c_device *ax_local)
+{
+ struct device *dev = (struct device*)&ax_local->spi->dev;
+ struct gpio_desc *reset_gpio;
+
+ /* reset info */
+ reset_gpio = gpiod_get(dev, "reset", 0);
+ if (IS_ERR(reset_gpio)) {
+ dev_err(dev, "Could not get 'reset' GPIO: %ld", PTR_ERR(reset_gpio));
+ return PTR_ERR(reset_gpio);
+ }
+
+ /* set reset */
+ gpiod_direction_output(reset_gpio, 1);
+ msleep(100);
+ gpiod_direction_output(reset_gpio, 0);
+ gpiod_put(reset_gpio);
+ msleep(10);
+
+ return 0;
+}
+
+static int ax88796c_probe(struct spi_device *spi)
+{
+ struct net_device *ndev;
+ struct ax88796c_device *ax_local;
+ int ret;
+ u16 temp;
+
+ ndev = devm_alloc_etherdev(&spi->dev, sizeof(*ax_local));
+ if (!ndev) {
+ dev_err(&spi->dev, "AX88796C SPI: Could not allocate ethernet device\n");
+ return -ENOMEM;
+ }
+
+ ax_local = to_ax88796c_device(ndev);
+ memset(ax_local, 0, sizeof(*ax_local));
+
+ dev_set_drvdata(&spi->dev, ax_local);
+ ax_local->spi = spi;
+ ax_local->ax_spi.spi = spi;
+
+ ndev->irq = spi->irq;
+
+ ax_local->msg_enable = msg_enable;
+ if (ps_level > AX_PS_D2 || ps_level < 0)
+ ax_local->ps_level = 0;
+ else
+ ax_local->ps_level = ps_level;
+
+ ax_local->capabilities |= comp ? AX_CAP_COMP : 0;
+
+ if (netif_msg_probe(ax_local)) {
+ dev_info(&spi->dev, "AX88796C-SPI Configuration:\n");
+ dev_info(&spi->dev, " Compression : %s\n",
+ ax_local->capabilities & AX_CAP_COMP ? "ON" : "OFF");
+ dev_info(&spi->dev, " Power Saving Level: %d\n",
+ ax_local->ps_level);
+ }
+
+ ndev->netdev_ops = &ax88796c_netdev_ops;
+ ndev->ethtool_ops = &ax88796c_ethtool_ops;
+
+ ax_local->ndev = ndev;
+
+ /* Initialize MII structure */
+ ax_local->mii.dev = ndev;
+ ax_local->mii.mdio_read = ax88796c_mdio_read;
+ ax_local->mii.mdio_write = ax88796c_mdio_write;
+ ax_local->mii.phy_id_mask = 0x3f;
+ ax_local->mii.reg_num_mask = 0x1f;
+ ax_local->mii.phy_id = 0x10;
+
+ /* ax88796c gpio reset */
+ ax88796c_hard_reset(ax_local);
+
+ /* Reset AX88796C */
+ ret = ax88796c_soft_reset(ax_local);
+ if (ret < 0) {
+ return -ENODEV;
+ }
+
+ /* Check board revision */
+ temp = AX_READ(&ax_local->ax_spi, P2_CRIR);
+ if ((temp & 0xF) != 0x0) {
+ dev_err(&spi->dev, "spi read failed: %d\n", temp);
+ return -ENODEV;
+ }
+
+ temp = AX_READ(&ax_local->ax_spi, P0_BOR);
+ if (temp == 0x1234) {
+ ax_local->plat_endian = PLAT_LITTLE_ENDIAN;
+ } else {
+ AX_WRITE(&ax_local->ax_spi, 0xFFFF, P0_BOR);
+ ax_local->plat_endian = PLAT_BIG_ENDIAN;
+ }
+
+ if (netif_msg_hw(ax_local)) {
+ dev_info(&spi->dev,
+ "Dump all MAC registers before initialization:\n");
+ ax88796c_dump_regs(ax_local);
+ ax88796c_dump_phy_regs(ax_local);
+ }
+
+ /*Reload EEPROM*/
+ ax88796c_reload_eeprom(ax_local);
+
+ ax88796c_load_mac_addr(ndev);
+
+ if (netif_msg_probe(ax_local))
+ dev_info(&spi->dev,
+ "irq %d, MAC addr "
+ "%02X:%02X:%02X:%02X:%02X:%02X\n",
+ ndev->irq,
+ ndev->dev_addr[0], ndev->dev_addr[1],
+ ndev->dev_addr[2], ndev->dev_addr[3],
+ ndev->dev_addr[4], ndev->dev_addr[5]);
+
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+
+ INIT_WORK(&ax_local->ax_work, ax88796c_work);
+
+ ax_local->ax_work_queue =
+ create_singlethread_workqueue("ax88796c_work");
+
+ sema_init(&ax_local->spi_lock, 1);
+
+ skb_queue_head_init(&ax_local->tx_wait_q);
+
+ ndev->features |= NETIF_F_HW_CSUM;
+ ax_local->checksum = AX_RX_CHECKSUM | AX_TX_CHECKSUM;
+ ndev->hard_header_len += (TX_OVERHEAD + 4);
+
+ ret = register_netdev(ndev);
+ if (!ret) {
+ if (netif_msg_probe(ax_local))
+ netdev_info(ndev, "%s %s registered\n",
+ dev_driver_string(&spi->dev),
+ dev_name(&spi->dev));
+ return ret;
+ }
+
+ dev_err(&spi->dev, "failed to register a network device\n");
+ destroy_workqueue(ax_local->ax_work_queue);
+
+ return ret;
+}
+
+static int
+ax88796c_suspend(struct spi_device *spi, pm_message_t mesg)
+{
+ struct ax88796c_device *ax_local = dev_get_drvdata(&spi->dev);
+ struct net_device *ndev = ax_local->ndev;
+ u8 power;
+
+ if (!ndev || !netif_running(ndev))
+ return 0;
+
+ netif_device_detach(ndev);
+
+ netif_stop_queue(ndev);
+
+ down(&ax_local->spi_lock);
+
+ power = ax88796c_check_power_and_wake(ax_local);
+
+ AX_WRITE(&ax_local->ax_spi, IMR_MASKALL, P0_IMR);
+ ax88796c_free_skb_queue(&ax_local->tx_wait_q);
+
+ if (ax_local->wol) {
+
+ AX_WRITE(&ax_local->ax_spi, 0, P5_WFTR);
+
+ if (ax_local->wol & WFCR_LINKCH) { /* Link change */
+
+ /* Disable wol power saving in link change mode */
+ AX_WRITE(&ax_local->ax_spi,
+ (AX_READ(&ax_local->ax_spi, P0_PSCR)
+ & ~PSCR_WOLPS), P0_PSCR);
+
+ if (netif_msg_wol(ax_local))
+ netdev_info(ndev,
+ "Enable link change wakeup\n");
+
+ AX_WRITE(&ax_local->ax_spi, WFTR_8192MS, P5_WFTR);
+ }
+ if (ax_local->wol & WFCR_MAGICP) { /* Magic packet */
+ if (netif_msg_wol(ax_local))
+ netdev_info(ndev,
+ "Enable magic packet wakeup\n");
+ }
+
+ AX_WRITE(&ax_local->ax_spi,
+ ax_local->wol | WFCR_WAKEUP | WFCR_PMEEN, P0_WFCR);
+ }
+
+ if (power)
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+
+ up(&ax_local->spi_lock);
+
+ return 0;
+}
+
+static int
+ax88796c_resume(struct spi_device *spi)
+{
+ struct ax88796c_device *ax_local = dev_get_drvdata(&spi->dev);
+ struct net_device *ndev = ax_local->ndev;
+ u16 pme;
+
+ down(&ax_local->spi_lock);
+
+ /* Wakeup AX88796C first */
+ ax88796c_check_power_and_wake(ax_local);
+ msleep(200);
+
+ pme = AX_READ(&ax_local->ax_spi, P0_WFCR);
+ if (ax_local->wol && ~(pme & WFCR_WAITEVENT)) {
+
+ if (pme & WFCR_LINKCHS) {
+ if (netif_msg_wol(ax_local))
+ netdev_info(ndev,
+ "Wakeuped from link change.\n");
+ } else if (pme & WFCR_MAGICPS) {
+ if (netif_msg_wol(ax_local))
+ netdev_info(ndev,
+ "Wakeuped from magic packet.\n");
+ }
+
+ AX_WRITE(&ax_local->ax_spi, WFCR_CLRWAKE, P0_WFCR);
+ }
+
+ netif_device_attach(ndev);
+
+ /* Initialize all the local variables*/
+ ax88796c_soft_reset(ax_local);
+
+ ax_local->seq_num = 0x1f;
+
+ ax88796c_set_mac_addr(ndev);
+ ax88796c_set_csums(ax_local);
+
+ /* Disable stuffing packet */
+ AX_WRITE(&ax_local->ax_spi,
+ AX_READ(&ax_local->ax_spi, P1_RXBSPCR)
+ & ~RXBSPCR_STUF_ENABLE, P1_RXBSPCR);
+
+ /* Enable RX packet process */
+ AX_WRITE(&ax_local->ax_spi, RPPER_RXEN, P1_RPPER);
+
+ AX_WRITE(&ax_local->ax_spi,
+ AX_READ(&ax_local->ax_spi, P0_FER)
+ | FER_RXEN | FER_TXEN | FER_BSWAP, P0_FER);
+
+ ax88796c_phy_init(ax_local);
+
+ AX_WRITE(&ax_local->ax_spi, IMR_DEFAULT, P0_IMR);
+
+ if (netif_msg_hw(ax_local)) {
+ netdev_info(ndev,
+ "Dump all MAC registers after initialization:\n");
+ ax88796c_dump_regs(ax_local);
+ ax88796c_dump_phy_regs(ax_local);
+ }
+
+ ax88796c_set_power_saving(ax_local, ax_local->ps_level);
+
+ netif_start_queue(ndev);
+
+ up(&ax_local->spi_lock);
+
+ return 0;
+}
+
+static int ax88796c_remove(struct spi_device *spi)
+{
+ struct ax88796c_device *ax_local = dev_get_drvdata(&spi->dev);
+ struct net_device *ndev = ax_local->ndev;
+
+ if (netif_msg_probe(ax_local))
+ netdev_info(ndev, "removing network device %s %s\n",
+ dev_driver_string(&spi->dev),
+ dev_name(&spi->dev));
+
+ destroy_workqueue(ax_local->ax_work_queue);
+
+ unregister_netdev(ndev);
+
+ if (netif_msg_probe(ax_local))
+ dev_info(&spi->dev, "device removed\n");
+
+ return 0;
+}
+
+#ifdef CONFIG_USE_OF
+static const struct of_device_id ax88796c_dt_ids[] = {
+ { .compatible = "asix,ax88796c" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ax88796c_dt_ids);
+#endif
+
+static const struct spi_device_id asix_id[] = {
+ { "ax88796c", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, asix_id);
+
+static struct spi_driver ax88796c_spi_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+#ifdef CONFIG_USE_OF
+ .of_match_table = of_match_ptr(ax88796c_dt_ids),
+#endif
+ },
+ .probe = ax88796c_probe,
+ .remove = ax88796c_remove,
+// .suspend = ax88796c_suspend,
+// .resume = ax88796c_resume,
+ .id_table = asix_id,
+};
+
+static __init int ax88796c_spi_init(void)
+{
+ pr_info("Register AX88796C SPI Ethernet Driver.\n");
+ return spi_register_driver(&ax88796c_spi_driver);
+}
+
+static __exit void ax88796c_spi_exit(void)
+{
+ spi_unregister_driver(&ax88796c_spi_driver);
+}
+
+module_init(ax88796c_spi_init);
+module_exit(ax88796c_spi_exit);
diff --git a/drivers/net/ethernet/asix/ax88796c_main.h b/drivers/net/ethernet/asix/ax88796c_main.h
new file mode 100644
index 000000000000..6c61766b1788
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_main.h
@@ -0,0 +1,596 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2010 ASIX Electronics Corporation
+ * Copyright (c) 2020 Samsung Electronics
+ *
+ * ASIX AX88796C SPI Fast Ethernet Linux driver
+ */
+
+#ifndef _AX88796C_MAIN_H
+#define _AX88796C_MAIN_H
+
+#define pr_fmt(fmt) "ax88796c: " fmt
+
+/* INCLUDE FILE DECLARATIONS */
+#ifdef CONFIG_USE_OF
+#include <linux/of.h>
+#endif
+#include <linux/crc32.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/gpio/consumer.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kmod.h>
+#include <linux/mii.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/spi/spi.h>
+#include <linux/timer.h>
+#include <linux/uaccess.h>
+#include <linux/usb.h>
+#include <linux/version.h>
+#include <linux/workqueue.h>
+
+#include <asm/dma.h>
+
+#include "ax88796c_spi.h"
+
+/* NAMING CONSTANT AND TYPE DECLARATIONS */
+/* These identify the driver base version and may not be removed. */
+#define DRV_NAME "ax88796c"
+#define ADP_NAME "ASIX AX88796C SPI Ethernet Adapter"
+#define DRV_VERSION "1.2.0"
+
+#define TX_QUEUE_HIGH_WATER 45 /* Tx queue high water mark */
+#define TX_QUEUE_LOW_WATER 20 /* Tx queue low water mark */
+
+#define AX88796C_WATCHDOG_PERIOD (1 * HZ)
+#define AX88796C_WATCHDOG_RESTART 7
+
+#define TX_OVERHEAD 8
+#define TX_EOP_SIZE 4
+
+#define AX_MCAST_FILTER_SIZE 8
+#define AX_MAX_MCAST 64
+#define AX_MAX_CLK 80000000
+#define TX_HDR_SOP_DICF 0x8000
+#define TX_HDR_SOP_CPHI 0x4000
+#define TX_HDR_SOP_INT 0x2000
+#define TX_HDR_SOP_MDEQ 0x1000
+#define TX_HDR_SOP_PKTLEN 0x07FF
+#define TX_HDR_SOP_SEQNUM 0xF800
+#define TX_HDR_SOP_PKTLENBAR 0x07FF
+
+#define TX_HDR_SEG_FS 0x8000
+#define TX_HDR_SEG_LS 0x4000
+#define TX_HDR_SEG_SEGNUM 0x3800
+#define TX_HDR_SEG_SEGLEN 0x0700
+#define TX_HDR_SEG_EOFST 0xC000
+#define TX_HDR_SEG_SOFST 0x3800
+#define TX_HDR_SEG_SEGLENBAR 0x07FF
+
+#define TX_HDR_EOP_SEQNUM 0xF800
+#define TX_HDR_EOP_PKTLEN 0x07FF
+#define TX_HDR_EOP_SEQNUMBAR 0xF800
+#define TX_HDR_EOP_PKTLENBAR 0x07FF
+
+/* Rx header fields mask */
+#define RX_HDR1_MCBC 0x8000
+#define RX_HDR1_STUFF_PKT 0x4000
+#define RX_HDR1_MII_ERR 0x2000
+#define RX_HDR1_CRC_ERR 0x1000
+#define RX_HDR1_PKT_LEN 0x07FF
+
+#define RX_HDR2_SEQ_NUM 0xF800
+#define RX_HDR2_PKT_LEN_BAR 0x7FFF
+
+#define RX_HDR3_PE 0x8000
+#define RX_HDR3_L4_TYPE_TCP 0x1000
+#define RX_HDR3_L4_TYPE_UDP 0x0400
+#define RX_HDR3_L3_ERR 0x0200
+#define RX_HDR3_L4_ERR 0x0100
+#define RX_HDR3_PRIORITY(x) ((x) << 4)
+#define RX_HDR3_STRIP 0x0008
+#define RX_HDR3_VLAN_ID 0x0007
+
+#define AX_RX_CHECKSUM 1
+#define AX_TX_CHECKSUM 2
+
+enum watchdog_state {
+ chk_link = 0,
+ chk_cable,
+ ax_nop,
+};
+
+struct ax88796c_device {
+
+ struct resource *addr_res; /* resources found */
+ struct resource *addr_req; /* resources requested */
+ struct resource *irq_res;
+
+ struct spi_device *spi;
+ struct net_device *ndev;
+ struct mii_if_info mii;
+ struct net_device_stats stats;
+
+ struct timer_list watchdog;
+ enum watchdog_state w_state;
+ size_t w_ticks;
+
+ struct work_struct ax_work;
+ struct workqueue_struct *ax_work_queue;
+ struct tasklet_struct bh;
+
+ struct semaphore spi_lock;
+
+ struct sk_buff_head tx_wait_q;
+
+ struct axspi_data ax_spi;
+
+ int msg_enable;
+
+ u16 seq_num;
+
+ u16 wol;
+
+ u8 checksum;
+
+ u8 multi_filter[AX_MCAST_FILTER_SIZE];
+
+ unsigned long capabilities;
+ #define AX_CAP_DMA 1
+ #define AX_CAP_COMP 2
+ #define AX_CAP_BIDIR 4
+
+ u8 plat_endian;
+ #define PLAT_LITTLE_ENDIAN 0
+ #define PLAT_BIG_ENDIAN 1
+
+ unsigned long flags;
+ #define EVENT_INTR 1
+ #define EVENT_TX 2
+ #define EVENT_SET_MULTI 4
+ #define EVENT_WATCHDOG 8
+
+ u8 ps_level;
+ #define AX_PS_D0 0
+ #define AX_PS_D1 1
+ #define AX_PS_D2 2
+
+
+};
+
+#define to_ax88796c_device(ndev) ((struct ax88796c_device *)netdev_priv(ndev))
+
+enum skb_state {
+ illegal = 0,
+ tx_done,
+ rx_done,
+ rx_err,
+};
+
+struct skb_data;
+
+struct skb_data {
+ enum skb_state state;
+ struct net_device *ndev;
+ struct sk_buff *skb;
+ size_t len;
+ dma_addr_t phy_addr;
+};
+
+/* A88796C register definition */
+ /* Definition of PAGE0 */
+#define P0_PSR (0x00)
+ #define PSR_DEV_READY (1 << 7)
+ #define PSR_RESET (0 << 15)
+ #define PSR_RESET_CLR (1 << 15)
+#define P0_BOR (0x02)
+#define P0_FER (0x04)
+ #define FER_IPALM (1 << 0)
+ #define FER_DCRC (1 << 1)
+ #define FER_RH3M (1 << 2)
+ #define FER_HEADERSWAP (1 << 7)
+ #define FER_WSWAP (1 << 8)
+ #define FER_BSWAP (1 << 9)
+ #define FER_INTHI (1 << 10)
+ #define FER_INTLO (0 << 10)
+ #define FER_IRQ_PULL (1 << 11)
+ #define FER_RXEN (1 << 14)
+ #define FER_TXEN (1 << 15)
+#define P0_ISR (0x06)
+ #define ISR_RXPKT (1 << 0)
+ #define ISR_MDQ (1 << 4)
+ #define ISR_TXT (1 << 5)
+ #define ISR_TXPAGES (1 << 6)
+ #define ISR_TXERR (1 << 8)
+ #define ISR_LINK (1 << 9)
+#define P0_IMR (0x08)
+ #define IMR_RXPKT (1 << 0)
+ #define IMR_MDQ (1 << 4)
+ #define IMR_TXT (1 << 5)
+ #define IMR_TXPAGES (1 << 6)
+ #define IMR_TXERR (1 << 8)
+ #define IMR_LINK (1 << 9)
+ #define IMR_MASKALL (0xFFFF)
+ #define IMR_DEFAULT (IMR_TXERR)
+#define P0_WFCR (0x0A)
+ #define WFCR_PMEIND (1 << 0) /* PME indication */
+ #define WFCR_PMETYPE (1 << 1) /* PME I/O type */
+ #define WFCR_PMEPOL (1 << 2) /* PME polarity */
+ #define WFCR_PMERST (1 << 3) /* Reset PME */
+ #define WFCR_SLEEP (1 << 4) /* Enable sleep mode */
+ #define WFCR_WAKEUP (1 << 5) /* Enable wakeup mode */
+ #define WFCR_WAITEVENT (1 << 6) /* Reserved */
+ #define WFCR_CLRWAKE (1 << 7) /* Clear wakeup */
+ #define WFCR_LINKCH (1 << 8) /* Enable link change */
+ #define WFCR_MAGICP (1 << 9) /* Enable magic packet */
+ #define WFCR_WAKEF (1 << 10) /* Enable wakeup frame */
+ #define WFCR_PMEEN (1 << 11) /* Enable PME pin */
+ #define WFCR_LINKCHS (1 << 12) /* Link change status */
+ #define WFCR_MAGICPS (1 << 13) /* Magic packet status */
+ #define WFCR_WAKEFS (1 << 14) /* Wakeup frame status */
+ #define WFCR_PMES (1 << 15) /* PME pin status */
+#define P0_PSCR (0x0C)
+ #define PSCR_PS_MASK (0xFFF0)
+ #define PSCR_PS_D0 (0)
+ #define PSCR_PS_D1 (1 << 0)
+ #define PSCR_PS_D2 (1 << 1)
+ #define PSCR_FPS (1 << 3) /* Enable fiber mode PS */
+ #define PSCR_SWPS (1 << 4) /* Enable software */
+ /* PS control */
+ #define PSCR_WOLPS (1 << 5) /* Enable WOL PS */
+ #define PSCR_SWWOL (1 << 6) /* Enable software select */
+ /* WOL PS */
+ #define PSCR_PHYOSC (1 << 7) /* Internal PHY OSC control */
+ #define PSCR_FOFEF (1 << 8) /* Force PHY generate FEF */
+ #define PSCR_FOF (1 << 9) /* Force PHY in fiber mode */
+ #define PSCR_PHYPD (1 << 10) /* PHY power down. */
+ /* Active high */
+ #define PSCR_PHYRST (1 << 11) /* PHY reset signal. */
+ /* Active low */
+ #define PSCR_PHYCSIL (1 << 12) /* PHY cable energy detect */
+ #define PSCR_PHYCOFF (1 << 13) /* PHY cable off */
+ #define PSCR_PHYLINK (1 << 14) /* PHY link status */
+ #define PSCR_EEPOK (1 << 15) /* EEPROM load complete */
+#define P0_MACCR (0x0E)
+ #define MACCR_RXFC_ENABLE (1 << 3)
+ #define MACCR_RXFC_MASK 0xFFF7
+ #define MACCR_TXFC_ENABLE (1 << 4)
+ #define MACCR_TXFC_MASK 0xFFEF
+ #define MACCR_PF (1 << 7)
+ #define MACCR_PMM_BITS 8
+ #define MACCR_PMM_MASK (0x1F00)
+ #define MACCR_PMM_RESET (1 << 8)
+ #define MACCR_PMM_WAIT (2 << 8)
+ #define MACCR_PMM_READY (3 << 8)
+ #define MACCR_PMM_D1 (4 << 8)
+ #define MACCR_PMM_D2 (5 << 8)
+ #define MACCR_PMM_WAKE (7 << 8)
+ #define MACCR_PMM_D1_WAKE (8 << 8)
+ #define MACCR_PMM_D2_WAKE (9 << 8)
+ #define MACCR_PMM_SLEEP (10 << 8)
+ #define MACCR_PMM_PHY_RESET (11 << 8)
+ #define MACCR_PMM_SOFT_D1 (16 << 8)
+ #define MACCR_PMM_SOFT_D2 (17 << 8)
+#define P0_TFBFCR (0x10)
+ #define TFBFCR_SCHE_FREE_PAGE 0xE07F
+ #define TFBFCR_FREE_PAGE_BITS 0x07
+ #define TFBFCR_FREE_PAGE_LATCH (1 << 6)
+ #define TFBFCR_SET_FREE_PAGE(x) ((x & 0x3F) << TFBFCR_FREE_PAGE_BITS)
+ #define TFBFCR_TX_PAGE_SET (1 << 13)
+ #define TFBFCR_MANU_ENTX (1 << 15)
+ #define TX_FREEBUF_MASK 0x003F
+ #define TX_DPTSTART 0x4000
+
+#define P0_TSNR (0x12)
+ #define TXNR_TXB_ERR (1 << 5)
+ #define TXNR_TXB_IDLE (1 << 6)
+ #define TSNR_PKT_CNT(x) (((x) & 0x3F) << 8)
+ #define TXNR_TXB_REINIT (1 << 14)
+ #define TSNR_TXB_START (1 << 15)
+#define P0_RTDPR (0x14)
+#define P0_RXBCR1 (0x16)
+ #define RXBCR1_RXB_DISCARD (1 << 14)
+ #define RXBCR1_RXB_START (1 << 15)
+#define P0_RXBCR2 (0x18)
+ #define RXBCR2_PKT_MASK (0xFF)
+ #define RXBCR2_RXPC_MASK (0x7F)
+ #define RXBCR2_RXB_READY (1 << 13)
+ #define RXBCR2_RXB_IDLE (1 << 14)
+ #define RXBCR2_RXB_REINIT (1 << 15)
+#define P0_RTWCR (0x1A)
+ #define RTWCR_RXWC_MASK (0x3FFF)
+ #define RTWCR_RX_LATCH (1 << 15)
+#define P0_RCPHR (0x1C)
+
+ /* Definition of PAGE1 */
+#define P1_RPPER (0x22)
+ #define RPPER_RXEN (1 << 0)
+#define P1_MRCR (0x28)
+#define P1_MDR (0x2A)
+#define P1_RMPR (0x2C)
+#define P1_TMPR (0x2E)
+#define P1_RXBSPCR (0x30)
+ #define RXBSPCR_STUF_WORD_CNT(x) (((x) & 0x7000) >> 12)
+ #define RXBSPCR_STUF_ENABLE (1 << 15)
+#define P1_MCR (0x32)
+ #define MCR_SBP (1 << 8)
+ #define MCR_SM (1 << 9)
+ #define MCR_CRCENLAN (1 << 11)
+ #define MCR_STP (1 << 12)
+ /* Definition of PAGE2 */
+#define P2_CIR (0x42)
+#define P2_POOLCR (0x44)
+ #define POOLCR_POLL_EN (1 << 0)
+ #define POOLCR_POLL_FLOWCTRL (1 << 1)
+ #define POOLCR_POLL_BMCR (1 << 2)
+ #define POOLCR_PHYID(x) ((x) << 8)
+#define P2_PHYSR (0x46)
+#define P2_MDIODR (0x48)
+#define P2_MDIOCR (0x4A)
+ #define MDIOCR_RADDR(x) ((x) & 0x1F)
+ #define MDIOCR_FADDR(x) (((x) & 0x1F) << 8)
+ #define MDIOCR_VALID (1 << 13)
+ #define MDIOCR_READ (1 << 14)
+ #define MDIOCR_WRITE (1 << 15)
+#define P2_LCR0 (0x4C)
+ #define LCR_LED0_EN (1 << 0)
+ #define LCR_LED0_100MODE (1 << 1)
+ #define LCR_LED0_DUPLEX (1 << 2)
+ #define LCR_LED0_LINK (1 << 3)
+ #define LCR_LED0_ACT (1 << 4)
+ #define LCR_LED0_COL (1 << 5)
+ #define LCR_LED0_10MODE (1 << 6)
+ #define LCR_LED0_DUPCOL (1 << 7)
+ #define LCR_LED1_EN (1 << 8)
+ #define LCR_LED1_100MODE (1 << 9)
+ #define LCR_LED1_DUPLEX (1 << 10)
+ #define LCR_LED1_LINK (1 << 11)
+ #define LCR_LED1_ACT (1 << 12)
+ #define LCR_LED1_COL (1 << 13)
+ #define LCR_LED1_10MODE (1 << 14)
+ #define LCR_LED1_DUPCOL (1 << 15)
+#define P2_LCR1 (0x4E)
+ #define LCR_LED2_MASK (0xFF00)
+ #define LCR_LED2_EN (1 << 0)
+ #define LCR_LED2_100MODE (1 << 1)
+ #define LCR_LED2_DUPLEX (1 << 2)
+ #define LCR_LED2_LINK (1 << 3)
+ #define LCR_LED2_ACT (1 << 4)
+ #define LCR_LED2_COL (1 << 5)
+ #define LCR_LED2_10MODE (1 << 6)
+ #define LCR_LED2_DUPCOL (1 << 7)
+#define P2_IPGCR (0x50)
+#define P2_CRIR (0x52)
+#define P2_FLHWCR (0x54)
+#define P2_RXCR (0x56)
+ #define RXCR_PRO (1 << 0)
+ #define RXCR_AMALL (1 << 1)
+ #define RXCR_SEP (1 << 2)
+ #define RXCR_AB (1 << 3)
+ #define RXCR_AM (1 << 4)
+ #define RXCR_AP (1 << 5)
+ #define RXCR_ARP (1 << 6)
+#define P2_JLCR (0x58)
+#define P2_MPLR (0x5C)
+
+ /* Definition of PAGE3 */
+#define P3_MACASR0 (0x62)
+ #define P3_MACASR(x) (P3_MACASR0 + 2*x)
+ #define MACASR_LOWBYTE_MASK 0x00FF
+ #define MACASR_HIGH_BITS 0x08
+#define P3_MACASR1 (0x64)
+#define P3_MACASR2 (0x66)
+#define P3_MFAR01 (0x68)
+#define P3_MFAR_BASE (0x68)
+ #define P3_MFAR(x) (P3_MFAR_BASE + 2*x)
+
+#define P3_MFAR23 (0x6A)
+#define P3_MFAR45 (0x6C)
+#define P3_MFAR67 (0x6E)
+#define P3_VID0FR (0x70)
+#define P3_VID1FR (0x72)
+#define P3_EECSR (0x74)
+#define P3_EEDR (0x76)
+#define P3_EECR (0x78)
+ #define EECR_ADDR_MASK (0x00FF)
+ #define EECR_READ_ACT (1 << 8)
+ #define EECR_WRITE_ACT (1 << 9)
+ #define EECR_WRITE_DISABLE (1 << 10)
+ #define EECR_WRITE_ENABLE (1 << 11)
+ #define EECR_EE_READY (1 << 13)
+ #define EECR_RELOAD (1 << 14)
+ #define EECR_RESET (1 << 15)
+#define P3_TPCR (0x7A)
+ #define TPCR_PATT_MASK (0xFF)
+ #define TPCR_RAND_PKT_EN (1 << 14)
+ #define TPCR_FIXED_PKT_EN (1 << 15)
+#define P3_TPLR (0x7C)
+ /* Definition of PAGE4 */
+#define P4_SPICR (0x8A)
+ #define SPICR_RCEN (1 << 0)
+ #define SPICR_QCEN (1 << 1)
+ #define SPICR_RBRE (1 << 3)
+ #define SPICR_PMM (1 << 4)
+ #define SPICR_LOOPBACK (1 << 8)
+ #define SPICR_CORE_RES_CLR (1 << 10)
+ #define SPICR_SPI_RES_CLR (1 << 11)
+#define P4_SPIISMR (0x8C)
+
+#define P4_COERCR0 (0x92)
+ #define COERCR0_RXIPCE (1 << 0)
+ #define COERCR0_RXIPVE (1 << 1)
+ #define COERCR0_RXV6PE (1 << 2)
+ #define COERCR0_RXTCPE (1 << 3)
+ #define COERCR0_RXUDPE (1 << 4)
+ #define COERCR0_RXICMP (1 << 5)
+ #define COERCR0_RXIGMP (1 << 6)
+ #define COERCR0_RXICV6 (1 << 7)
+
+ #define COERCR0_RXTCPV6 (1 << 8)
+ #define COERCR0_RXUDPV6 (1 << 9)
+ #define COERCR0_RXICMV6 (1 << 10)
+ #define COERCR0_RXIGMV6 (1 << 11)
+ #define COERCR0_RXICV6V6 (1 << 12)
+
+ #define COERCR0_DEFAULT (COERCR0_RXIPCE | COERCR0_RXV6PE | \
+ COERCR0_RXTCPE | COERCR0_RXUDPE | \
+ COERCR0_RXTCPV6 | COERCR0_RXUDPV6)
+#define P4_COERCR1 (0x94)
+ #define COERCR1_IPCEDP (1 << 0)
+ #define COERCR1_IPVEDP (1 << 1)
+ #define COERCR1_V6VEDP (1 << 2)
+ #define COERCR1_TCPEDP (1 << 3)
+ #define COERCR1_UDPEDP (1 << 4)
+ #define COERCR1_ICMPDP (1 << 5)
+ #define COERCR1_IGMPDP (1 << 6)
+ #define COERCR1_ICV6DP (1 << 7)
+ #define COERCR1_RX64TE (1 << 8)
+ #define COERCR1_RXPPPE (1 << 9)
+ #define COERCR1_TCP6DP (1 << 10)
+ #define COERCR1_UDP6DP (1 << 11)
+ #define COERCR1_IC6DP (1 << 12)
+ #define COERCR1_IG6DP (1 << 13)
+ #define COERCR1_ICV66DP (1 << 14)
+ #define COERCR1_RPCE (1 << 15)
+
+ #define COERCR1_DEFAULT (COERCR1_RXPPPE)
+#define P4_COETCR0 (0x96)
+ #define COETCR0_TXIP (1 << 0)
+ #define COETCR0_TXTCP (1 << 1)
+ #define COETCR0_TXUDP (1 << 2)
+ #define COETCR0_TXICMP (1 << 3)
+ #define COETCR0_TXIGMP (1 << 4)
+ #define COETCR0_TXICV6 (1 << 5)
+ #define COETCR0_TXTCPV6 (1 << 8)
+ #define COETCR0_TXUDPV6 (1 << 9)
+ #define COETCR0_TXICMV6 (1 << 10)
+ #define COETCR0_TXIGMV6 (1 << 11)
+ #define COETCR0_TXICV6V6 (1 << 12)
+
+ #define COETCR0_DEFAULT (COETCR0_TXIP | COETCR0_TXTCP | \
+ COETCR0_TXUDP | COETCR0_TXTCPV6 | \
+ COETCR0_TXUDPV6)
+#define P4_COETCR1 (0x98)
+ #define COETCR1_TX64TE (1 << 0)
+ #define COETCR1_TXPPPE (1 << 1)
+
+#define P4_COECEDR (0x9A)
+#define P4_L2CECR (0x9C)
+
+ /* Definition of PAGE5 */
+#define P5_WFTR (0xA2)
+ #define WFTR_2MS (0x01)
+ #define WFTR_4MS (0x02)
+ #define WFTR_8MS (0x03)
+ #define WFTR_16MS (0x04)
+ #define WFTR_32MS (0x05)
+ #define WFTR_64MS (0x06)
+ #define WFTR_128MS (0x07)
+ #define WFTR_256MS (0x08)
+ #define WFTR_512MS (0x09)
+ #define WFTR_1024MS (0x0A)
+ #define WFTR_2048MS (0x0B)
+ #define WFTR_4096MS (0x0C)
+ #define WFTR_8192MS (0x0D)
+ #define WFTR_16384MS (0x0E)
+ #define WFTR_32768MS (0x0F)
+#define P5_WFCCR (0xA4)
+#define P5_WFCR03 (0xA6)
+ #define WFCR03_F0_EN (1 << 0)
+ #define WFCR03_F1_EN (1 << 4)
+ #define WFCR03_F2_EN (1 << 8)
+ #define WFCR03_F3_EN (1 << 12)
+#define P5_WFCR47 (0xA8)
+ #define WFCR47_F4_EN (1 << 0)
+ #define WFCR47_F5_EN (1 << 4)
+ #define WFCR47_F6_EN (1 << 8)
+ #define WFCR47_F7_EN (1 << 12)
+#define P5_WF0BMR0 (0xAA)
+#define P5_WF0BMR1 (0xAC)
+#define P5_WF0CR (0xAE)
+#define P5_WF0OBR (0xB0)
+#define P5_WF1BMR0 (0xB2)
+#define P5_WF1BMR1 (0xB4)
+#define P5_WF1CR (0xB6)
+#define P5_WF1OBR (0xB8)
+#define P5_WF2BMR0 (0xBA)
+#define P5_WF2BMR1 (0xBC)
+
+ /* Definition of PAGE6 */
+#define P6_WF2CR (0xC2)
+#define P6_WF2OBR (0xC4)
+#define P6_WF3BMR0 (0xC6)
+#define P6_WF3BMR1 (0xC8)
+#define P6_WF3CR (0xCA)
+#define P6_WF3OBR (0xCC)
+#define P6_WF4BMR0 (0xCE)
+#define P6_WF4BMR1 (0xD0)
+#define P6_WF4CR (0xD2)
+#define P6_WF4OBR (0xD4)
+#define P6_WF5BMR0 (0xD6)
+#define P6_WF5BMR1 (0xD8)
+#define P6_WF5CR (0xDA)
+#define P6_WF5OBR (0xDC)
+
+/* Definition of PAGE7 */
+#define P7_WF6BMR0 (0xE2)
+#define P7_WF6BMR1 (0xE4)
+#define P7_WF6CR (0xE6)
+#define P7_WF6OBR (0xE8)
+#define P7_WF7BMR0 (0xEA)
+#define P7_WF7BMR1 (0xEC)
+#define P7_WF7CR (0xEE)
+#define P7_WF7OBR (0xF0)
+#define P7_WFR01 (0xF2)
+#define P7_WFR23 (0xF4)
+#define P7_WFR45 (0xF6)
+#define P7_WFR67 (0xF8)
+#define P7_WFPC0 (0xFA)
+#define P7_WFPC1 (0xFC)
+
+
+/* Tx headers structure */
+struct tx_sop_header {
+ /* bit 15-11: flags, bit 10-0: packet length */
+ u16 flags_len;
+ /* bit 15-11: sequence number, bit 11-0: packet length bar */
+ u16 seq_lenbar;
+} __packed;
+
+struct tx_segment_header {
+ /* bit 15-14: flags, bit 13-11: segment number */
+ /* bit 10-0: segment length */
+ u16 flags_seqnum_seglen;
+ /* bit 15-14: end offset, bit 13-11: start offset */
+ /* bit 10-0: segment length bar */
+ u16 eo_so_seglenbar;
+} __packed;
+
+struct tx_eop_header {
+ /* bit 15-11: sequence number, bit 10-0: packet length */
+ u16 seq_len;
+ /* bit 15-11: sequence number bar, bit 10-0: packet length bar */
+ u16 seqbar_lenbar;
+} __packed;
+
+struct tx_pkt_info {
+ struct tx_sop_header sop;
+ struct tx_segment_header seg;
+ struct tx_eop_header eop;
+ u16 pkt_len;
+ u16 seq_num;
+} __packed;
+
+/* Rx headers structure */
+struct rx_header {
+ u16 flags_len;
+ u16 seq_lenbar;
+ u16 flags;
+} __packed;
+
+#endif /* #ifndef _AX88796C_MAIN_H */
diff --git a/drivers/net/ethernet/asix/ax88796c_spi.c b/drivers/net/ethernet/asix/ax88796c_spi.c
new file mode 100644
index 000000000000..5304eb33aad2
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_spi.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2010 ASIX Electronics Corporation
+ *
+ * ASIX AX88796C SPI Fast Ethernet Linux driver
+ */
+
+#include "ax88796c_main.h"
+#include "ax88796c_spi.h"
+
+/* driver bus management functions */
+void axspi_wakeup(struct axspi_data *ax_spi)
+{
+ u8 tx_buf;
+ int ret;
+
+ tx_buf = AX_SPICMD_EXIT_PWD; /* OP */
+ ret = spi_write(ax_spi->spi, &tx_buf, 1);
+ if (ret)
+ dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret);
+}
+
+void axspi_read_status(struct axspi_data *ax_spi, struct spi_status *status)
+{
+ u8 tx_buf;
+ int ret;
+
+ /* OP */
+ tx_buf = AX_SPICMD_READ_STATUS;
+ ret = spi_write_then_read(ax_spi->spi, &tx_buf, 1, (u8 *)&status, 3);
+ if (ret)
+ dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret);
+ else
+ le16_to_cpus(&status->isr);
+}
+
+int axspi_read_rxq(struct axspi_data *ax_spi, void *data, int len)
+{
+ struct spi_transfer *xfer = ax_spi->spi_rx_xfer;
+ int ret;
+
+ memcpy(ax_spi->cmd_buf, rx_cmd_buf, 5);
+
+ xfer->tx_buf = ax_spi->cmd_buf;
+ xfer->rx_buf = NULL;
+ xfer->len = ax_spi->comp ? 2 : 5;
+ xfer->bits_per_word = 8;
+ spi_message_add_tail(xfer, &ax_spi->rx_msg);
+
+ xfer++;
+ xfer->rx_buf = data;
+ xfer->tx_buf = NULL;
+ xfer->len = len;
+ xfer->bits_per_word = 8;
+ spi_message_add_tail(xfer, &ax_spi->rx_msg);
+ ret = spi_sync(ax_spi->spi, &ax_spi->rx_msg);
+ if (ret)
+ dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret);
+
+ return ret;
+}
+
+int axspi_write_txq(struct axspi_data *ax_spi, void *data, int len)
+{
+ return spi_write(ax_spi->spi, data, len);
+}
+
+u16 axspi_read_reg(struct axspi_data *ax_spi, u8 reg)
+{
+ u8 tx_buf[4];
+ u16 rx_buf = 0;
+ int ret;
+ int len = ax_spi->comp ? 3 : 4;
+
+ tx_buf[0] = 0x03; /* OP code read register */
+ tx_buf[1] = reg; /* register address */
+ tx_buf[2] = 0xFF; /* dumy cycle */
+ tx_buf[3] = 0xFF; /* dumy cycle */
+ ret = spi_write_then_read(ax_spi->spi, tx_buf, len, (u8 *)&rx_buf, 2);
+ if (ret)
+ dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret);
+ else
+ le16_to_cpus(&rx_buf);
+
+ return rx_buf;
+}
+
+void axspi_write_reg(struct axspi_data *ax_spi, u8 reg, u16 value)
+{
+ u8 tx_buf[4];
+ int ret;
+
+ tx_buf[0] = AX_SPICMD_WRITE_REG; /* OP code read register */
+ tx_buf[1] = reg; /* register address */
+ tx_buf[2] = value;
+ tx_buf[3] = value >> 8;
+
+ ret = spi_write(ax_spi->spi, tx_buf, 4);
+ if (ret)
+ dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret);
+
+}
+
diff --git a/drivers/net/ethernet/asix/ax88796c_spi.h b/drivers/net/ethernet/asix/ax88796c_spi.h
new file mode 100644
index 000000000000..8c2cb4425d12
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_spi.h
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2010 ASIX Electronics Corporation
+ *
+ * ASIX AX88796C SPI Fast Ethernet Linux driver
+ */
+
+#ifndef _AX88796C_SPI_H
+#define _AX88796C_SPI_H
+
+#include <linux/spi/spi.h>
+
+/* Definition of SPI command */
+#define AX_SPICMD_WRITE_TXQ 0x02
+#define AX_SPICMD_READ_REG 0x03
+#define AX_SPICMD_READ_STATUS 0x05
+#define AX_SPICMD_READ_RXQ 0x0B
+#define AX_SPICMD_BIDIR_WRQ 0xB2
+#define AX_SPICMD_WRITE_REG 0xD8
+#define AX_SPICMD_EXIT_PWD 0xAB
+
+static const u8 rx_cmd_buf[5] = {AX_SPICMD_READ_RXQ, 0xFF, 0xFF, 0xFF, 0xFF};
+static const u8 tx_cmd_buf[4] = {AX_SPICMD_WRITE_TXQ, 0xFF, 0xFF, 0xFF};
+
+struct axspi_data {
+ struct spi_device *spi;
+ struct spi_message rx_msg;
+ struct spi_transfer spi_rx_xfer[2];
+ u8 cmd_buf[6];
+ u8 comp;
+};
+
+struct spi_status {
+ u16 isr;
+ u8 status;
+# define AX_STATUS_READY 0x80
+};
+
+int axspi_read_rxq(struct axspi_data *ax_spi, void *data, int len);
+int axspi_write_txq(struct axspi_data *ax_spi, void *data, int len);
+u16 axspi_read_reg(struct axspi_data *ax_spi, u8 reg);
+void axspi_write_reg(struct axspi_data *ax_spi, u8 reg, u16 value);
+void axspi_read_status(struct axspi_data *ax_spi, struct spi_status *status);
+void axspi_wakeup(struct axspi_data *ax_spi);
+
+static inline u16 AX_READ(struct axspi_data *ax_spi, u8 offset)
+{
+ return axspi_read_reg(ax_spi, offset);
+}
+
+static inline void AX_WRITE(struct axspi_data *ax_spi, u16 value, u8 offset)
+{
+ axspi_write_reg(ax_spi, offset, value);
+}
+
+static inline void AX_READ_STATUS(struct axspi_data *ax_spi,
+ struct spi_status *status)
+{
+ axspi_read_status(ax_spi, status);
+}
+
+static inline void AX_WAKEUP(struct axspi_data *ax_spi)
+{
+ return axspi_wakeup(ax_spi);
+}
+#endif
+
--
2.26.2