This is a driver for AX88796C Ethernet Adapter connected in SPI mode as
found on ARTIK5 evaluation board. The driver has been ported from a
v3.10.9 vendor kernel for ARTIK5 board.
Changes in v11:
- changed stat counters to 64-bit
- replaced WARN_ON(!mutex_is_locked()) with lockdep_assert_held()
- replaced ax88796c_free_skb_queue() with __skb_queue_purge()
- added cancel_work_sync() for ax_work
- removed unused fields of struct skb_data
- replaced MAX() with max() from minmax.h
- rebased to net-next (resend)
Changes in v10:
- removed unused variable
Changes in v9:
- used pskb_extend_head()
- used ethtool private flags instead of tunables to switch SPI
compression
- changed
- alloc_skb() to netdev_alloc(skb)
- __pskb_trim() to pskb_trim()
- removed:
- chages to skb->truesize
- unnecessary casting to short
- return f() in a void function
- IRQF_SHARED flags
- unnecessary memset(0) of kzalloc()ed buffer
- unused endiannes detection
- unnecessary __packed attribute for some structures
- added:
- temporary variable in AX_WRITE/READ sequences
- missin mutex_unlock() in error paths
- axspi_read_reg() returns a constant value in case of an error
Changes in v8:
- fixed the entry in MAINTAINERS
- removed unnecessary netif_err()
- changed netif_rx() to netif_rx_ni() for code running in a process
context
- added explicit type casting for ~BIT()
Changes in v7:
- removed duplicate code
- moved a constant buffer definition away from a header file
Changes in v6:
- fixed typos in Kconfig
- checked argument value in ax88796c_set_tunable
- updated tags in commit messages
Changes in v5:
- coding style (local variable declarations)
- added spi0 node in the DT binding example and removed
interrupt-parent
- removed comp module parameter
- added CONFIG_SPI_AX88796C_COMPRESSION option to set the initial
state of SPI compression
- introduced new ethtool tunable "spi-compression" to controll SPI
transfer compression
- removed unused fields in struct ax88796c_device
- switched from using buffers allocated on stack for SPI transfers
to DMA safe ones embedded in struct ax_spi and allocated with
kmalloc()
Changes in v4:
- fixed compilation problems in asix,ax88796c.yaml and in
ax88796c_main.c introduced in v3
Changes in v3:
- modify vendor-prefixes.yaml in a separate patch
- fix several problems in the dt binding
- removed unnecessary descriptions and properties
- changed the order of entries
- fixed problems with missing defines in the example
- change (1 << N) to BIT(N), left a few (0 << N)
- replace ax88796c_get_link(), ax88796c_get_link_ksettings(),
ax88796c_set_link_ksettings(), ax88796c_nway_reset(),
ax88796c_set_mac_address() with appropriate kernel functions.
- disable PHY auto-polling in MAC and use PHYLIB to track the state
of PHY and configure MAC
- propagate return values instead of returning constants in several
places
- add WARN_ON() for unlocked mutex
- remove local work queue and use the system_wq
- replace phy_connect_direct() with phy_connect() and move
devm_register_netdev() to the end of ax88796c_probe()
(Unlike phy_connect_direct() phy_connect() does not crash if the
network device isn't registered yet.)
- remove error messages on ENOMEM
- move free_irq() to the end of ax88796c_close() to avoid race
condition
- implement flow-control
Changes in v2:
- use phylib
- added DT bindings
- moved #includes to *.c files
- used mutex instead of a semaphore for locking
- renamed some constants
- added error propagation for several functions
- used ethtool for dumping registers
- added control over checksum offloading
- remove vendor specific PM
- removed macaddr module parameter and added support for reading a MAC
address from platform data (e.g. DT)
- removed dependency on SPI from NET_VENDOR_ASIX
- added an entry in the MAINTAINERS file
- simplified logging with appropriate netif_* and netdev_* helpers
- lots of style fixes
Łukasz Stelmach (3):
dt-bindings: vendor-prefixes: Add asix prefix
dt-bindings: net: Add bindings for AX88796C SPI Ethernet Adapter
net: ax88796c: ASIX AX88796C SPI Ethernet Adapter Driver
.../bindings/net/asix,ax88796c.yaml | 73 ++
.../devicetree/bindings/vendor-prefixes.yaml | 2 +
MAINTAINERS | 6 +
drivers/net/ethernet/Kconfig | 1 +
drivers/net/ethernet/Makefile | 1 +
drivers/net/ethernet/asix/Kconfig | 35 +
drivers/net/ethernet/asix/Makefile | 6 +
drivers/net/ethernet/asix/ax88796c_ioctl.c | 239 ++++
drivers/net/ethernet/asix/ax88796c_ioctl.h | 26 +
drivers/net/ethernet/asix/ax88796c_main.c | 1146 +++++++++++++++++
drivers/net/ethernet/asix/ax88796c_main.h | 568 ++++++++
drivers/net/ethernet/asix/ax88796c_spi.c | 115 ++
drivers/net/ethernet/asix/ax88796c_spi.h | 69 +
13 files changed, 2287 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/asix,ax88796c.yaml
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
--
2.26.2
Add the prefix for ASIX Electronics Corporation.
Signed-off-by: Łukasz Stelmach <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Acked-by: Rob Herring <[email protected]>
---
Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index f3134f44c80c..cd1712660b98 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -127,6 +127,8 @@ patternProperties:
description: Asahi Kasei Corp.
"^asc,.*":
description: All Sensors Corporation
+ "^asix,.*":
+ description: ASIX Electronics Corporation
"^aspeed,.*":
description: ASPEED Technology Inc.
"^asus,.*":
--
2.26.2
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,
+ removed awkward vendor power managemtn.
+ introduced ethtool tunable to control SPI compression
[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 <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
---
MAINTAINERS | 6 +
drivers/net/ethernet/Kconfig | 1 +
drivers/net/ethernet/Makefile | 1 +
drivers/net/ethernet/asix/Kconfig | 35 +
drivers/net/ethernet/asix/Makefile | 6 +
drivers/net/ethernet/asix/ax88796c_ioctl.c | 239 ++++
drivers/net/ethernet/asix/ax88796c_ioctl.h | 26 +
drivers/net/ethernet/asix/ax88796c_main.c | 1146 ++++++++++++++++++++
drivers/net/ethernet/asix/ax88796c_main.h | 568 ++++++++++
drivers/net/ethernet/asix/ax88796c_spi.c | 115 ++
drivers/net/ethernet/asix/ax88796c_spi.h | 69 ++
11 files changed, 2212 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/MAINTAINERS b/MAINTAINERS
index a50a543e3c81..e029fa37df5e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2757,6 +2757,12 @@ S: Maintained
F: Documentation/hwmon/asc7621.rst
F: drivers/hwmon/asc7621.c
+ASIX AX88796C SPI ETHERNET ADAPTER
+M: Łukasz Stelmach <[email protected]>
+S: Maintained
+F: Documentation/devicetree/bindings/net/asix,ax88796c.yaml
+F: drivers/net/ethernet/asix/ax88796c_*
+
ASPEED PINCTRL DRIVERS
M: Andrew Jeffery <[email protected]>
L: [email protected] (moderated for non-subscribers)
diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index ad04660b97b8..ca556a2b6bba 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/broadcom/Kconfig"
source "drivers/net/ethernet/brocade/Kconfig"
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index 1e7dc8a7762d..a393eb9f9fe5 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-$(CONFIG_NET_VENDOR_CADENCE) += cadence/
obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/
diff --git a/drivers/net/ethernet/asix/Kconfig b/drivers/net/ethernet/asix/Kconfig
new file mode 100644
index 000000000000..eed02453314c
--- /dev/null
+++ b/drivers/net/ethernet/asix/Kconfig
@@ -0,0 +1,35 @@
+#
+# Asix network device configuration
+#
+
+config NET_VENDOR_ASIX
+ bool "Asix devices"
+ default y
+ help
+ If you have a network (Ethernet, non-USB, not NE2000 compatible)
+ interface based on a chip from ASIX, say Y.
+
+if NET_VENDOR_ASIX
+
+config SPI_AX88796C
+ tristate "Asix AX88796C-SPI support"
+ select PHYLIB
+ depends on SPI
+ depends on GPIOLIB
+ help
+ Say Y here if you intend to use ASIX AX88796C attached in SPI mode.
+
+config SPI_AX88796C_COMPRESSION
+ bool "SPI transfer compression"
+ default n
+ depends on SPI_AX88796C
+ help
+ Say Y here to enable SPI transfer compression. It saves up
+ to 24 dummy cycles during each transfer which may noticeably
+ speed up short transfers. This sets the default value that is
+ inherited by network interfaces during probe. It can be
+ changed at run time via spi-compression ethtool tunable.
+
+ If unsure say N.
+
+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..916ae380a004
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_ioctl.c
@@ -0,0 +1,239 @@
+// 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
+ */
+
+#define pr_fmt(fmt) "ax88796c: " fmt
+
+#include <linux/bitmap.h>
+#include <linux/iopoll.h>
+#include <linux/phy.h>
+#include <linux/netdevice.h>
+
+#include "ax88796c_main.h"
+#include "ax88796c_ioctl.h"
+
+static const char ax88796c_priv_flag_names[][ETH_GSTRING_LEN] = {
+ "SPICompression",
+};
+
+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));
+}
+
+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 void
+ax88796c_get_pauseparam(struct net_device *ndev, struct ethtool_pauseparam *pause)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+
+ pause->tx_pause = !!(ax_local->flowctrl & AX_FC_TX);
+ pause->rx_pause = !!(ax_local->flowctrl & AX_FC_RX);
+ pause->autoneg = (ax_local->flowctrl & AX_FC_ANEG) ?
+ AUTONEG_ENABLE :
+ AUTONEG_DISABLE;
+}
+
+static int
+ax88796c_set_pauseparam(struct net_device *ndev, struct ethtool_pauseparam *pause)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ int fc;
+
+ /* The following logic comes from phylink_ethtool_set_pauseparam() */
+ fc = pause->tx_pause ? AX_FC_TX : 0;
+ fc |= pause->rx_pause ? AX_FC_RX : 0;
+ fc |= pause->autoneg ? AX_FC_ANEG : 0;
+
+ ax_local->flowctrl = fc;
+
+ if (pause->autoneg) {
+ phy_set_asym_pause(ax_local->phydev, pause->tx_pause,
+ pause->rx_pause);
+ } else {
+ int maccr = 0;
+
+ phy_set_asym_pause(ax_local->phydev, 0, 0);
+ maccr |= (ax_local->flowctrl & AX_FC_RX) ? MACCR_RXFC_ENABLE : 0;
+ maccr |= (ax_local->flowctrl & AX_FC_TX) ? MACCR_TXFC_ENABLE : 0;
+
+ mutex_lock(&ax_local->spi_lock);
+
+ maccr |= AX_READ(&ax_local->ax_spi, P0_MACCR) &
+ ~(MACCR_TXFC_ENABLE | MACCR_RXFC_ENABLE);
+ AX_WRITE(&ax_local->ax_spi, maccr, P0_MACCR);
+
+ mutex_unlock(&ax_local->spi_lock);
+ }
+
+ return 0;
+}
+
+static int ax88796c_get_regs_len(struct net_device *ndev)
+{
+ return AX88796C_REGDUMP_LEN + AX88796C_PHY_REGDUMP_LEN;
+}
+
+static void
+ax88796c_get_regs(struct net_device *ndev, struct ethtool_regs *regs, void *_p)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ int offset, i;
+ u16 *p = _p;
+
+ memset(p, 0, ax88796c_get_regs_len(ndev));
+
+ mutex_lock(&ax_local->spi_lock);
+
+ for (offset = 0; offset < AX88796C_REGDUMP_LEN; offset += 2) {
+ if (!test_bit(offset / 2, ax88796c_no_regs_mask))
+ *p = AX_READ(&ax_local->ax_spi, offset);
+ p++;
+ }
+
+ mutex_unlock(&ax_local->spi_lock);
+
+ for (i = 0; i < AX88796C_PHY_REGDUMP_LEN / 2; i++) {
+ *p = phy_read(ax_local->phydev, i);
+ p++;
+ }
+}
+
+static void
+ax88796c_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
+{
+ switch (stringset) {
+ case ETH_SS_PRIV_FLAGS:
+ memcpy(data, ax88796c_priv_flag_names,
+ sizeof(ax88796c_priv_flag_names));
+ break;
+ }
+}
+
+static int
+ax88796c_get_sset_count(struct net_device *ndev, int stringset)
+{
+ int ret = 0;
+
+ switch (stringset) {
+ case ETH_SS_PRIV_FLAGS:
+ ret = ARRAY_SIZE(ax88796c_priv_flag_names);
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ }
+
+ return ret;
+}
+
+static int ax88796c_set_priv_flags(struct net_device *ndev, u32 flags)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+
+ if (flags & ~AX_PRIV_FLAGS_MASK)
+ return -EOPNOTSUPP;
+
+ if ((ax_local->priv_flags ^ flags) & AX_CAP_COMP)
+ if (netif_running(ndev))
+ return -EBUSY;
+
+ ax_local->priv_flags = flags;
+
+ return 0;
+}
+
+static u32 ax88796c_get_priv_flags(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+
+ return ax_local->priv_flags;
+}
+
+int ax88796c_mdio_read(struct mii_bus *mdiobus, int phy_id, int loc)
+{
+ struct ax88796c_device *ax_local = mdiobus->priv;
+ int ret;
+
+ mutex_lock(&ax_local->spi_lock);
+ AX_WRITE(&ax_local->ax_spi, MDIOCR_RADDR(loc)
+ | MDIOCR_FADDR(phy_id) | MDIOCR_READ, P2_MDIOCR);
+
+ ret = read_poll_timeout(AX_READ, ret,
+ (ret != 0),
+ 0, jiffies_to_usecs(HZ / 100), false,
+ &ax_local->ax_spi, P2_MDIOCR);
+ if (!ret)
+ ret = AX_READ(&ax_local->ax_spi, P2_MDIODR);
+
+ mutex_unlock(&ax_local->spi_lock);
+
+ return ret;
+}
+
+int
+ax88796c_mdio_write(struct mii_bus *mdiobus, int phy_id, int loc, u16 val)
+{
+ struct ax88796c_device *ax_local = mdiobus->priv;
+ int ret;
+
+ mutex_lock(&ax_local->spi_lock);
+ 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);
+
+ ret = read_poll_timeout(AX_READ, ret,
+ ((ret & MDIOCR_VALID) != 0), 0,
+ jiffies_to_usecs(HZ / 100), false,
+ &ax_local->ax_spi, P2_MDIOCR);
+ mutex_unlock(&ax_local->spi_lock);
+
+ return ret;
+}
+
+const struct ethtool_ops ax88796c_ethtool_ops = {
+ .get_drvinfo = ax88796c_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+ .get_msglevel = ax88796c_get_msglevel,
+ .set_msglevel = ax88796c_set_msglevel,
+ .get_link_ksettings = phy_ethtool_get_link_ksettings,
+ .set_link_ksettings = phy_ethtool_set_link_ksettings,
+ .nway_reset = phy_ethtool_nway_reset,
+ .get_pauseparam = ax88796c_get_pauseparam,
+ .set_pauseparam = ax88796c_set_pauseparam,
+ .get_regs_len = ax88796c_get_regs_len,
+ .get_regs = ax88796c_get_regs,
+ .get_strings = ax88796c_get_strings,
+ .get_sset_count = ax88796c_get_sset_count,
+ .get_priv_flags = ax88796c_get_priv_flags,
+ .set_priv_flags = ax88796c_set_priv_flags,
+};
+
+int ax88796c_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
+{
+ int ret;
+
+ ret = phy_mii_ioctl(ndev->phydev, ifr, cmd);
+
+ 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..34d2a7dcc5ef
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_ioctl.h
@@ -0,0 +1,26 @@
+/* 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
+ */
+
+#ifndef _AX88796C_IOCTL_H
+#define _AX88796C_IOCTL_H
+
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+
+#include "ax88796c_main.h"
+
+extern const struct ethtool_ops ax88796c_ethtool_ops;
+
+bool ax88796c_check_power(const struct ax88796c_device *ax_local);
+bool 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 mii_bus *mdiobus, int phy_id, int loc);
+int ax88796c_mdio_write(struct mii_bus *mdiobus, int phy_id, int loc, u16 val);
+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..743a28c92473
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_main.c
@@ -0,0 +1,1146 @@
+// 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
+ */
+
+#define pr_fmt(fmt) "ax88796c: " fmt
+
+#include "ax88796c_main.h"
+#include "ax88796c_ioctl.h"
+
+#include <linux/bitmap.h>
+#include <linux/etherdevice.h>
+#include <linux/iopoll.h>
+#include <linux/lockdep.h>
+#include <linux/mdio.h>
+#include <linux/minmax.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/skbuff.h>
+#include <linux/spi/spi.h>
+
+static int comp = IS_ENABLED(CONFIG_SPI_AX88796C_COMPRESSION);
+static int msg_enable = NETIF_MSG_PROBE |
+ NETIF_MSG_LINK |
+ NETIF_MSG_RX_ERR |
+ NETIF_MSG_TX_ERR;
+
+static char *no_regs_list = "80018001,e1918001,8001a001,fc0d0000";
+unsigned long ax88796c_no_regs_mask[AX88796C_REGDUMP_LEN / (sizeof(unsigned long) * 8)];
+
+module_param(msg_enable, int, 0444);
+MODULE_PARM_DESC(msg_enable, "Message mask (see linux/netdevice.h for bitmap)");
+
+static int ax88796c_soft_reset(struct ax88796c_device *ax_local)
+{
+ u16 temp;
+ int ret;
+
+ lockdep_assert_held(&ax_local->spi_lock);
+
+ AX_WRITE(&ax_local->ax_spi, PSR_RESET, P0_PSR);
+ AX_WRITE(&ax_local->ax_spi, PSR_RESET_CLR, P0_PSR);
+
+ ret = read_poll_timeout(AX_READ, ret,
+ (ret & PSR_DEV_READY),
+ 0, jiffies_to_usecs(160 * HZ / 1000), false,
+ &ax_local->ax_spi, P0_PSR);
+ if (ret)
+ return ret;
+
+ temp = AX_READ(&ax_local->ax_spi, P4_SPICR);
+ if (ax_local->priv_flags & 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)
+{
+ int ret;
+
+ lockdep_assert_held(&ax_local->spi_lock);
+
+ AX_WRITE(&ax_local->ax_spi, EECR_RELOAD, P3_EECR);
+
+ ret = read_poll_timeout(AX_READ, ret,
+ (ret & PSR_DEV_READY),
+ 0, jiffies_to_usecs(2 * HZ / 1000), false,
+ &ax_local->ax_spi, P0_PSR);
+ if (ret) {
+ dev_err(&ax_local->spi->dev,
+ "timeout waiting for reload eeprom\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void ax88796c_set_hw_multicast(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ int mc_count = netdev_mc_count(ndev);
+ u16 rx_ctl = RXCR_AB;
+
+ lockdep_assert_held(&ax_local->spi_lock);
+
+ 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);
+}
+
+static void ax88796c_set_mac_addr(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+
+ lockdep_assert_held(&ax_local->spi_lock);
+
+ 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 void ax88796c_load_mac_addr(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ u16 temp;
+
+ lockdep_assert_held(&ax_local->spi_lock);
+
+ /* Try the device tree first */
+ if (!eth_platform_get_mac_address(&ax_local->spi->dev, ndev->dev_addr) &&
+ is_valid_ether_addr(ndev->dev_addr)) {
+ if (netif_msg_probe(ax_local))
+ dev_info(&ax_local->spi->dev,
+ "MAC address read from device tree\n");
+ return;
+ }
+
+ /* 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);
+
+ if (is_valid_ether_addr(ndev->dev_addr)) {
+ if (netif_msg_probe(ax_local))
+ dev_info(&ax_local->spi->dev,
+ "MAC address read from ASIX chip\n");
+ return;
+ }
+
+ /* Use random address if none found */
+ if (netif_msg_probe(ax_local))
+ dev_info(&ax_local->spi->dev, "Use random MAC address\n");
+ eth_hw_addr_random(ndev);
+}
+
+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) ||
+ (ip_summed == CHECKSUM_UNNECESSARY) ? 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;
+
+ lockdep_assert_held(&ax_local->spi_lock);
+
+ 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);
+ u8 spi_len = ax_local->ax_spi.comp ? 1 : 4;
+ struct sk_buff *skb;
+ struct tx_pkt_info info;
+ struct skb_data *entry;
+ u16 pkt_len;
+ u8 padlen, seq_num;
+ u8 need_pages;
+ int headroom;
+ int tailroom;
+
+ 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 = round_up(pkt_len, 4) - pkt_len;
+ seq_num = ++ax_local->seq_num & 0x1F;
+
+ info.pkt_len = pkt_len;
+
+ if (skb_cloned(skb) ||
+ (headroom < (TX_OVERHEAD + spi_len)) ||
+ (tailroom < (padlen + TX_EOP_SIZE))) {
+ size_t h = max((TX_OVERHEAD + spi_len) - headroom,0);
+ size_t t = max((padlen + TX_EOP_SIZE) - tailroom,0);
+
+ if (pskb_expand_head(skb, h, t, GFP_KERNEL))
+ return NULL;
+ }
+
+ 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), ax88796c_tx_cmd_buf, spi_len);
+
+ /* Make 32-bit alignment */
+ skb_put(skb, padlen);
+
+ /* EOP header */
+ memcpy(skb_put(skb, TX_EOP_SIZE), &info.eop, TX_EOP_SIZE);
+
+ skb_unlink(skb, q);
+
+ entry = (struct skb_data *)skb->cb;
+ memset(entry, 0, sizeof(*entry));
+ entry->len = pkt_len;
+
+ if (netif_msg_pktdata(ax_local)) {
+ char pfx[IFNAMSIZ + 7];
+
+ snprintf(pfx, sizeof(pfx), "%s: ", ndev->name);
+
+ netdev_info(ndev, "TX packet len %d, total len %d, seq %d\n",
+ pkt_len, skb->len, seq_num);
+
+ netdev_info(ndev, " SPI Header:\n");
+ print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1,
+ skb->data, 4, 0);
+
+ netdev_info(ndev, " TX SOP:\n");
+ print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1,
+ skb->data + 4, TX_OVERHEAD, 0);
+
+ netdev_info(ndev, " TX packet:\n");
+ print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1,
+ skb->data + 4 + TX_OVERHEAD,
+ skb->len - TX_EOP_SIZE - 4 - TX_OVERHEAD, 0);
+
+ netdev_info(ndev, " TX EOP:\n");
+ print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1,
+ skb->data + skb->len - 4, 4, 0);
+ }
+
+ return skb;
+}
+
+static int ax88796c_hard_xmit(struct ax88796c_device *ax_local)
+{
+ struct ax88796c_pcpu_stats *stats;
+ struct sk_buff *tx_skb;
+ struct skb_data *entry;
+
+ lockdep_assert_held(&ax_local->spi_lock);
+
+ stats = this_cpu_ptr(ax_local->stats);
+ tx_skb = ax88796c_tx_fixup(ax_local->ndev, &ax_local->tx_wait_q);
+
+ if (!tx_skb) {
+ this_cpu_inc(ax_local->stats->tx_dropped);
+ 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);
+
+ this_cpu_inc(ax_local->stats->tx_dropped);
+
+ if (net_ratelimit())
+ netif_err(ax_local, tx_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 {
+ u64_stats_update_begin(&stats->syncp);
+ u64_stats_inc(&stats->tx_packets);
+ u64_stats_add(&stats->tx_bytes, entry->len);
+ u64_stats_update_end(&stats->syncp);
+ }
+
+ 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)
+ netif_stop_queue(ndev);
+
+ set_bit(EVENT_TX, &ax_local->flags);
+ schedule_work(&ax_local->ax_work);
+
+ return NETDEV_TX_OK;
+}
+
+static void
+ax88796c_skb_return(struct ax88796c_device *ax_local,
+ struct sk_buff *skb, struct rx_header *rxhdr)
+{
+ struct net_device *ndev = ax_local->ndev;
+ struct ax88796c_pcpu_stats *stats;
+ int status;
+
+ stats = this_cpu_ptr(ax_local->stats);
+
+ do {
+ if (!(ndev->features & NETIF_F_RXCSUM))
+ break;
+
+ /* checksum error bit is set */
+ if ((rxhdr->flags & RX_HDR3_L3_ERR) ||
+ (rxhdr->flags & RX_HDR3_L4_ERR))
+ break;
+
+ /* Other types may be indicated by more than one bit. */
+ if ((rxhdr->flags & RX_HDR3_L4_TYPE_TCP) ||
+ (rxhdr->flags & RX_HDR3_L4_TYPE_UDP))
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ } while (0);
+
+ u64_stats_update_begin(&stats->syncp);
+ u64_stats_inc(&stats->rx_packets);
+ u64_stats_add(&stats->rx_bytes, skb->len);
+ u64_stats_update_end(&stats->syncp);
+
+ skb->dev = ndev;
+ skb->protocol = eth_type_trans(skb, ax_local->ndev);
+
+ netif_info(ax_local, rx_status, ndev, "< rx, len %zu, type 0x%x\n",
+ skb->len + sizeof(struct ethhdr), skb->protocol);
+
+ status = netif_rx_ni(skb);
+ if (status != NET_RX_SUCCESS && net_ratelimit())
+ netif_info(ax_local, rx_err, ndev,
+ "netif_rx status %d\n", status);
+}
+
+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 ((rxhdr->flags_len & RX_HDR1_PKT_LEN) !=
+ (~rxhdr->seq_lenbar & 0x7FF)) {
+ netif_err(ax_local, rx_err, ndev, "Header error\n");
+
+ this_cpu_inc(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)) {
+ netif_err(ax_local, rx_err, ndev, "CRC or MII error\n");
+
+ this_cpu_inc(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)) {
+ char pfx[IFNAMSIZ + 7];
+
+ snprintf(pfx, sizeof(pfx), "%s: ", ndev->name);
+ netdev_info(ndev, "RX data, total len %d, packet len %d\n",
+ rx_skb->len, len);
+
+ netdev_info(ndev, " Dump RX packet header:");
+ print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1,
+ rx_skb->data, sizeof(*rxhdr), 0);
+
+ netdev_info(ndev, " Dump RX packet:");
+ print_hex_dump(KERN_INFO, pfx, DUMP_PREFIX_OFFSET, 16, 1,
+ rx_skb->data + sizeof(*rxhdr), len, 0);
+ }
+
+ skb_pull(rx_skb, sizeof(*rxhdr));
+ pskb_trim(rx_skb, len);
+
+ 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 skb_data *entry;
+ u16 w_count, pkt_len;
+ struct sk_buff *skb;
+ u8 pkt_cnt;
+
+ lockdep_assert_held(&ax_local->spi_lock);
+
+ /* 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 = round_up(pkt_len + 6, 4) >> 1;
+
+ skb = netdev_alloc_skb(ndev, w_count * 2);
+ if (!skb) {
+ AX_WRITE(&ax_local->ax_spi, RXBCR1_RXB_DISCARD, P0_RXBCR1);
+ this_cpu_inc(ax_local->stats->rx_dropped);
+ 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 (net_ratelimit())
+ netif_err(ax_local, rx_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 int ax88796c_process_isr(struct ax88796c_device *ax_local)
+{
+ struct net_device *ndev = ax_local->ndev;
+ int todo = 0;
+ u16 isr;
+
+ lockdep_assert_held(&ax_local->spi_lock);
+
+ isr = AX_READ(&ax_local->ax_spi, P0_ISR);
+ AX_WRITE(&ax_local->ax_spi, isr, P0_ISR);
+
+ netif_dbg(ax_local, intr, ndev, " ISR 0x%04x\n", isr);
+
+ if (isr & ISR_TXERR) {
+ netif_dbg(ax_local, intr, ndev, " TXERR interrupt\n");
+ AX_WRITE(&ax_local->ax_spi, TXNR_TXB_REINIT, P0_TSNR);
+ ax_local->seq_num = 0x1f;
+ }
+
+ if (isr & ISR_TXPAGES) {
+ netif_dbg(ax_local, intr, ndev, " TXPAGES interrupt\n");
+ set_bit(EVENT_TX, &ax_local->flags);
+ }
+
+ if (isr & ISR_LINK) {
+ netif_dbg(ax_local, intr, ndev, " Link change interrupt\n");
+ phy_mac_interrupt(ax_local->ndev->phydev);
+ }
+
+ if (isr & ISR_RXPKT) {
+ netif_dbg(ax_local, intr, ndev, " RX interrupt\n");
+ todo = ax88796c_receive(ax_local->ndev);
+ }
+
+ return todo;
+}
+
+static irqreturn_t ax88796c_interrupt(int irq, void *dev_instance)
+{
+ struct ax88796c_device *ax_local;
+ struct net_device *ndev;
+
+ ndev = dev_instance;
+ if (!ndev) {
+ pr_err("irq %d for unknown device.\n", irq);
+ return IRQ_RETVAL(0);
+ }
+ ax_local = to_ax88796c_device(ndev);
+
+ disable_irq_nosync(irq);
+
+ netif_dbg(ax_local, intr, ndev, "Interrupt occurred\n");
+
+ set_bit(EVENT_INTR, &ax_local->flags);
+ schedule_work(&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);
+
+ mutex_lock(&ax_local->spi_lock);
+
+ if (test_bit(EVENT_SET_MULTI, &ax_local->flags)) {
+ ax88796c_set_hw_multicast(ax_local->ndev);
+ clear_bit(EVENT_SET_MULTI, &ax_local->flags);
+ }
+
+ if (test_bit(EVENT_INTR, &ax_local->flags)) {
+ AX_WRITE(&ax_local->ax_spi, IMR_MASKALL, P0_IMR);
+
+ while (ax88796c_process_isr(ax_local))
+ /* nothing */;
+
+ 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)) {
+ 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);
+ }
+
+ mutex_unlock(&ax_local->spi_lock);
+}
+
+static void ax88796c_get_stats64(struct net_device *ndev,
+ struct rtnl_link_stats64 *stats)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ u32 rx_frame_errors = 0, rx_crc_errors = 0;
+ u32 rx_dropped = 0, tx_dropped = 0;
+ unsigned int start;
+ int cpu;
+
+ for_each_possible_cpu(cpu) {
+ struct ax88796c_pcpu_stats *s;
+ u64 rx_packets, rx_bytes;
+ u64 tx_packets, tx_bytes;
+
+ s = per_cpu_ptr(ax_local->stats, cpu);
+
+ do {
+ start = u64_stats_fetch_begin_irq(&s->syncp);
+ rx_packets = u64_stats_read(&s->rx_packets);
+ rx_bytes = u64_stats_read(&s->rx_bytes);
+ tx_packets = u64_stats_read(&s->tx_packets);
+ tx_bytes = u64_stats_read(&s->tx_bytes);
+ } while (u64_stats_fetch_retry_irq(&s->syncp, start));
+
+ stats->rx_packets += rx_packets;
+ stats->rx_bytes += rx_bytes;
+ stats->tx_packets += tx_packets;
+ stats->tx_bytes += tx_bytes;
+
+ rx_dropped += stats->rx_dropped;
+ tx_dropped += stats->tx_dropped;
+ rx_frame_errors += stats->rx_frame_errors;
+ rx_crc_errors += stats->rx_crc_errors;
+ }
+
+ stats->rx_dropped = rx_dropped;
+ stats->tx_dropped = tx_dropped;
+ stats->rx_frame_errors = rx_frame_errors;
+ stats->rx_crc_errors = rx_crc_errors;
+}
+
+static void ax88796c_set_mac(struct ax88796c_device *ax_local)
+{
+ u16 maccr;
+
+ maccr = (ax_local->link) ? MACCR_RXEN : 0;
+
+ switch (ax_local->speed) {
+ case SPEED_100:
+ maccr |= MACCR_SPEED_100;
+ case SPEED_10:
+ case SPEED_UNKNOWN:
+ break;
+ default:
+ return;
+ }
+
+ switch (ax_local->duplex) {
+ case DUPLEX_FULL:
+ maccr |= MACCR_SPEED_100;
+ case DUPLEX_HALF:
+ case DUPLEX_UNKNOWN:
+ break;
+ default:
+ return;
+ }
+
+ if (ax_local->flowctrl & AX_FC_ANEG &&
+ ax_local->phydev->autoneg) {
+ maccr |= ax_local->pause ? MACCR_RXFC_ENABLE : 0;
+ maccr |= !ax_local->pause != !ax_local->asym_pause ?
+ MACCR_TXFC_ENABLE : 0;
+ } else {
+ maccr |= (ax_local->flowctrl & AX_FC_RX) ? MACCR_RXFC_ENABLE : 0;
+ maccr |= (ax_local->flowctrl & AX_FC_TX) ? MACCR_TXFC_ENABLE : 0;
+ }
+
+ mutex_lock(&ax_local->spi_lock);
+
+ maccr |= AX_READ(&ax_local->ax_spi, P0_MACCR) &
+ ~(MACCR_DUPLEX_FULL | MACCR_SPEED_100 |
+ MACCR_TXFC_ENABLE | MACCR_RXFC_ENABLE);
+ AX_WRITE(&ax_local->ax_spi, maccr, P0_MACCR);
+
+ mutex_unlock(&ax_local->spi_lock);
+}
+
+static void ax88796c_handle_link_change(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ struct phy_device *phydev = ndev->phydev;
+ bool update = false;
+
+ if (phydev->link && (ax_local->speed != phydev->speed ||
+ ax_local->duplex != phydev->duplex ||
+ ax_local->pause != phydev->pause ||
+ ax_local->asym_pause != phydev->asym_pause)) {
+ ax_local->speed = phydev->speed;
+ ax_local->duplex = phydev->duplex;
+ ax_local->pause = phydev->pause;
+ ax_local->asym_pause = phydev->asym_pause;
+ update = true;
+ }
+
+ if (phydev->link != ax_local->link) {
+ if (!phydev->link) {
+ ax_local->speed = SPEED_UNKNOWN;
+ ax_local->duplex = DUPLEX_UNKNOWN;
+ }
+
+ ax_local->link = phydev->link;
+ update = true;
+ }
+
+ if (update)
+ ax88796c_set_mac(ax_local);
+
+ if (net_ratelimit())
+ phy_print_status(ndev->phydev);
+}
+
+static void ax88796c_set_csums(struct ax88796c_device *ax_local)
+{
+ struct net_device *ndev = ax_local->ndev;
+
+ lockdep_assert_held(&ax_local->spi_lock);
+
+ if (ndev->features & NETIF_F_RXCSUM) {
+ 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 (ndev->features & NETIF_F_HW_CSUM) {
+ 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 int
+ax88796c_open(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ unsigned long irq_flag = 0;
+ int fc = AX_FC_NONE;
+ int ret;
+ u16 t;
+
+ 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 ret;
+ }
+
+ mutex_lock(&ax_local->spi_lock);
+
+ ret = ax88796c_soft_reset(ax_local);
+ if (ret < 0) {
+ free_irq(ndev->irq, ndev);
+ mutex_unlock(&ax_local->spi_lock);
+ return ret;
+ }
+ ax_local->seq_num = 0x1f;
+
+ ax88796c_set_mac_addr(ndev);
+ ax88796c_set_csums(ax_local);
+
+ /* Disable stuffing packet */
+ t = AX_READ(&ax_local->ax_spi, P1_RXBSPCR);
+ t &= ~RXBSPCR_STUF_ENABLE;
+ AX_WRITE(&ax_local->ax_spi, t, P1_RXBSPCR);
+
+ /* Enable RX packet process */
+ AX_WRITE(&ax_local->ax_spi, RPPER_RXEN, P1_RPPER);
+
+ t = AX_READ(&ax_local->ax_spi, P0_FER);
+ t |= FER_RXEN | FER_TXEN | FER_BSWAP | FER_IRQ_PULL;
+ AX_WRITE(&ax_local->ax_spi, t, P0_FER);
+
+ /* 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);
+
+ /* Disable PHY auto-polling */
+ AX_WRITE(&ax_local->ax_spi, PCR_PHYID(AX88796C_PHY_ID), P2_PCR);
+
+ /* Enable MAC interrupts */
+ AX_WRITE(&ax_local->ax_spi, IMR_DEFAULT, P0_IMR);
+
+ mutex_unlock(&ax_local->spi_lock);
+
+ /* Setup flow-control configuration */
+ phy_support_asym_pause(ax_local->phydev);
+
+ if (ax_local->phydev->advertising &&
+ (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+ ax_local->phydev->advertising) ||
+ linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+ ax_local->phydev->advertising)))
+ fc |= AX_FC_ANEG;
+
+ fc |= linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+ ax_local->phydev->advertising) ? AX_FC_RX : 0;
+ fc |= (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+ ax_local->phydev->advertising) !=
+ linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+ ax_local->phydev->advertising)) ? AX_FC_TX : 0;
+ ax_local->flowctrl = fc;
+
+ phy_start(ax_local->ndev->phydev);
+
+ netif_start_queue(ndev);
+
+ spi_message_init(&ax_local->ax_spi.rx_msg);
+
+ return 0;
+}
+
+static int
+ax88796c_close(struct net_device *ndev)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+
+ netif_stop_queue(ndev);
+ phy_stop(ndev->phydev);
+
+ mutex_lock(&ax_local->spi_lock);
+
+ /* Disable MAC interrupts */
+ AX_WRITE(&ax_local->ax_spi, IMR_MASKALL, P0_IMR);
+ __skb_queue_purge(&ax_local->tx_wait_q);
+ ax88796c_soft_reset(ax_local);
+
+ mutex_unlock(&ax_local->spi_lock);
+
+ free_irq(ndev->irq, ndev);
+
+ return 0;
+}
+
+static int
+ax88796c_set_features(struct net_device *ndev, netdev_features_t features)
+{
+ struct ax88796c_device *ax_local = to_ax88796c_device(ndev);
+ netdev_features_t changed = features ^ ndev->features;
+
+ if (!(changed & (NETIF_F_RXCSUM | NETIF_F_HW_CSUM)))
+ return 0;
+
+ ndev->features = features;
+
+ if (changed & (NETIF_F_RXCSUM | NETIF_F_HW_CSUM))
+ ax88796c_set_csums(ax_local);
+
+ 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_stats64 = ax88796c_get_stats64,
+ .ndo_do_ioctl = ax88796c_ioctl,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_set_features = ax88796c_set_features,
+};
+
+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(20);
+
+ return 0;
+}
+
+static int ax88796c_probe(struct spi_device *spi)
+{
+ char phy_id[MII_BUS_ID_SIZE + 3];
+ struct ax88796c_device *ax_local;
+ struct net_device *ndev;
+ u16 temp;
+ int ret;
+
+ ndev = devm_alloc_etherdev(&spi->dev, sizeof(*ax_local));
+ if (!ndev)
+ return -ENOMEM;
+
+ SET_NETDEV_DEV(ndev, &spi->dev);
+
+ ax_local = to_ax88796c_device(ndev);
+
+ dev_set_drvdata(&spi->dev, ax_local);
+ ax_local->spi = spi;
+ ax_local->ax_spi.spi = spi;
+
+ ax_local->stats =
+ devm_netdev_alloc_pcpu_stats(&spi->dev,
+ struct ax88796c_pcpu_stats);
+ if (!ax_local->stats)
+ return -ENOMEM;
+
+ ax_local->ndev = ndev;
+ ax_local->priv_flags |= comp ? AX_CAP_COMP : 0;
+ ax_local->msg_enable = msg_enable;
+ mutex_init(&ax_local->spi_lock);
+
+ ax_local->mdiobus = devm_mdiobus_alloc(&spi->dev);
+ if (!ax_local->mdiobus)
+ return -ENOMEM;
+
+ ax_local->mdiobus->priv = ax_local;
+ ax_local->mdiobus->read = ax88796c_mdio_read;
+ ax_local->mdiobus->write = ax88796c_mdio_write;
+ ax_local->mdiobus->name = "ax88976c-mdiobus";
+ ax_local->mdiobus->phy_mask = (u32)~BIT(AX88796C_PHY_ID);
+ ax_local->mdiobus->parent = &spi->dev;
+
+ snprintf(ax_local->mdiobus->id, MII_BUS_ID_SIZE,
+ "ax88796c-%s.%u", dev_name(&spi->dev), spi->chip_select);
+
+ ret = devm_mdiobus_register(&spi->dev, ax_local->mdiobus);
+ if (ret < 0) {
+ dev_err(&spi->dev, "Could not register MDIO bus\n");
+ return ret;
+ }
+
+ if (netif_msg_probe(ax_local)) {
+ dev_info(&spi->dev, "AX88796C-SPI Configuration:\n");
+ dev_info(&spi->dev, " Compression : %s\n",
+ ax_local->priv_flags & AX_CAP_COMP ? "ON" : "OFF");
+ }
+
+ ndev->irq = spi->irq;
+ ndev->netdev_ops = &ax88796c_netdev_ops;
+ ndev->ethtool_ops = &ax88796c_ethtool_ops;
+ ndev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
+ ndev->features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
+ ndev->needed_headroom = TX_OVERHEAD;
+ ndev->needed_tailroom = TX_EOP_SIZE;
+
+ mutex_lock(&ax_local->spi_lock);
+
+ /* ax88796c gpio reset */
+ ax88796c_hard_reset(ax_local);
+
+ /* Reset AX88796C */
+ ret = ax88796c_soft_reset(ax_local);
+ if (ret < 0) {
+ ret = -ENODEV;
+ mutex_unlock(&ax_local->spi_lock);
+ goto err;
+ }
+ /* 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);
+ ret = -ENODEV;
+ mutex_unlock(&ax_local->spi_lock);
+ goto err;
+ }
+
+ /*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]);
+
+ /* Disable power saving */
+ AX_WRITE(&ax_local->ax_spi, (AX_READ(&ax_local->ax_spi, P0_PSCR)
+ & PSCR_PS_MASK) | PSCR_PS_D0, P0_PSCR);
+
+ mutex_unlock(&ax_local->spi_lock);
+
+ INIT_WORK(&ax_local->ax_work, ax88796c_work);
+
+ skb_queue_head_init(&ax_local->tx_wait_q);
+
+ snprintf(phy_id, MII_BUS_ID_SIZE + 3, PHY_ID_FMT,
+ ax_local->mdiobus->id, AX88796C_PHY_ID);
+ ax_local->phydev = phy_connect(ax_local->ndev, phy_id,
+ ax88796c_handle_link_change,
+ PHY_INTERFACE_MODE_MII);
+ if (IS_ERR(ax_local->phydev)) {
+ ret = PTR_ERR(ax_local->phydev);
+ goto err;
+ }
+ ax_local->phydev->irq = PHY_POLL;
+
+ ret = devm_register_netdev(&spi->dev, ndev);
+ if (ret) {
+ dev_err(&spi->dev, "failed to register a network device\n");
+ goto err_phy_dis;
+ }
+
+ netif_info(ax_local, probe, ndev, "%s %s registered\n",
+ dev_driver_string(&spi->dev),
+ dev_name(&spi->dev));
+ phy_attached_info(ax_local->phydev);
+
+ return 0;
+
+err_phy_dis:
+ phy_disconnect(ax_local->phydev);
+err:
+ return ret;
+}
+
+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;
+
+ phy_disconnect(ndev->phydev);
+
+ cancel_work_sync(&ax_local->ax_work);
+
+ netif_info(ax_local, probe, ndev, "removing network device %s %s\n",
+ dev_driver_string(&spi->dev),
+ dev_name(&spi->dev));
+
+ return 0;
+}
+
+static const struct of_device_id ax88796c_dt_ids[] = {
+ { .compatible = "asix,ax88796c" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ax88796c_dt_ids);
+
+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,
+ .of_match_table = of_match_ptr(ax88796c_dt_ids),
+ },
+ .probe = ax88796c_probe,
+ .remove = ax88796c_remove,
+ .id_table = asix_id,
+};
+
+static __init int ax88796c_spi_init(void)
+{
+ int ret;
+
+ bitmap_zero(ax88796c_no_regs_mask, AX88796C_REGDUMP_LEN);
+ ret = bitmap_parse(no_regs_list, 35,
+ ax88796c_no_regs_mask, AX88796C_REGDUMP_LEN);
+ if (ret) {
+ bitmap_fill(ax88796c_no_regs_mask, AX88796C_REGDUMP_LEN);
+ pr_err("Invalid bitmap description, masking all registers\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);
+
+MODULE_AUTHOR("ASIX");
+MODULE_DESCRIPTION("ASIX AX88796C SPI Ethernet driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/ethernet/asix/ax88796c_main.h b/drivers/net/ethernet/asix/ax88796c_main.h
new file mode 100644
index 000000000000..80263c3cef75
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_main.h
@@ -0,0 +1,568 @@
+/* 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
+
+#include <linux/netdevice.h>
+#include <linux/mii.h>
+
+#include "ax88796c_spi.h"
+
+/* These identify the driver base version and may not be removed. */
+#define DRV_NAME "ax88796c"
+#define ADP_NAME "ASIX AX88796C SPI Ethernet Adapter"
+
+#define TX_QUEUE_HIGH_WATER 45 /* Tx queue high water mark */
+#define TX_QUEUE_LOW_WATER 20 /* Tx queue low water mark */
+
+#define AX88796C_REGDUMP_LEN 256
+#define AX88796C_PHY_REGDUMP_LEN 14
+#define AX88796C_PHY_ID 0x10
+
+#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_L3_TYPE_IPV4V6 0x6000
+#define RX_HDR3_L3_TYPE_IP 0x4000
+#define RX_HDR3_L3_TYPE_IPV6 0x2000
+#define RX_HDR3_L4_TYPE_ICMPV6 0x1400
+#define RX_HDR3_L4_TYPE_TCP 0x1000
+#define RX_HDR3_L4_TYPE_IGMP 0x0c00
+#define RX_HDR3_L4_TYPE_ICMP 0x0800
+#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
+
+struct ax88796c_pcpu_stats {
+ u64_stats_t rx_packets;
+ u64_stats_t rx_bytes;
+ u64_stats_t tx_packets;
+ u64_stats_t tx_bytes;
+ struct u64_stats_sync syncp;
+ u32 rx_dropped;
+ u32 tx_dropped;
+ u32 rx_frame_errors;
+ u32 rx_crc_errors;
+};
+
+struct ax88796c_device {
+ struct spi_device *spi;
+ struct net_device *ndev;
+ struct ax88796c_pcpu_stats __percpu *stats;
+
+ struct work_struct ax_work;
+
+ struct mutex spi_lock; /* device access */
+
+ struct sk_buff_head tx_wait_q;
+
+ struct axspi_data ax_spi;
+
+ struct mii_bus *mdiobus;
+ struct phy_device *phydev;
+
+ int msg_enable;
+
+ u16 seq_num;
+
+ u8 multi_filter[AX_MCAST_FILTER_SIZE];
+
+ int link;
+ int speed;
+ int duplex;
+ int pause;
+ int asym_pause;
+ int flowctrl;
+ #define AX_FC_NONE 0
+ #define AX_FC_RX BIT(0)
+ #define AX_FC_TX BIT(1)
+ #define AX_FC_ANEG BIT(2)
+
+ u32 priv_flags;
+ #define AX_CAP_COMP BIT(0)
+ #define AX_PRIV_FLAGS_MASK (AX_CAP_COMP)
+
+ unsigned long flags;
+ #define EVENT_INTR BIT(0)
+ #define EVENT_TX BIT(1)
+ #define EVENT_SET_MULTI BIT(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 {
+ enum skb_state state;
+ size_t len;
+};
+
+/* A88796C register definition */
+ /* Definition of PAGE0 */
+#define P0_PSR (0x00)
+ #define PSR_DEV_READY BIT(7)
+ #define PSR_RESET (0 << 15)
+ #define PSR_RESET_CLR BIT(15)
+#define P0_BOR (0x02)
+#define P0_FER (0x04)
+ #define FER_IPALM BIT(0)
+ #define FER_DCRC BIT(1)
+ #define FER_RH3M BIT(2)
+ #define FER_HEADERSWAP BIT(7)
+ #define FER_WSWAP BIT(8)
+ #define FER_BSWAP BIT(9)
+ #define FER_INTHI BIT(10)
+ #define FER_INTLO (0 << 10)
+ #define FER_IRQ_PULL BIT(11)
+ #define FER_RXEN BIT(14)
+ #define FER_TXEN BIT(15)
+#define P0_ISR (0x06)
+ #define ISR_RXPKT BIT(0)
+ #define ISR_MDQ BIT(4)
+ #define ISR_TXT BIT(5)
+ #define ISR_TXPAGES BIT(6)
+ #define ISR_TXERR BIT(8)
+ #define ISR_LINK BIT(9)
+#define P0_IMR (0x08)
+ #define IMR_RXPKT BIT(0)
+ #define IMR_MDQ BIT(4)
+ #define IMR_TXT BIT(5)
+ #define IMR_TXPAGES BIT(6)
+ #define IMR_TXERR BIT(8)
+ #define IMR_LINK BIT(9)
+ #define IMR_MASKALL (0xFFFF)
+ #define IMR_DEFAULT (IMR_TXERR)
+#define P0_WFCR (0x0A)
+ #define WFCR_PMEIND BIT(0) /* PME indication */
+ #define WFCR_PMETYPE BIT(1) /* PME I/O type */
+ #define WFCR_PMEPOL BIT(2) /* PME polarity */
+ #define WFCR_PMERST BIT(3) /* Reset PME */
+ #define WFCR_SLEEP BIT(4) /* Enable sleep mode */
+ #define WFCR_WAKEUP BIT(5) /* Enable wakeup mode */
+ #define WFCR_WAITEVENT BIT(6) /* Reserved */
+ #define WFCR_CLRWAKE BIT(7) /* Clear wakeup */
+ #define WFCR_LINKCH BIT(8) /* Enable link change */
+ #define WFCR_MAGICP BIT(9) /* Enable magic packet */
+ #define WFCR_WAKEF BIT(10) /* Enable wakeup frame */
+ #define WFCR_PMEEN BIT(11) /* Enable PME pin */
+ #define WFCR_LINKCHS BIT(12) /* Link change status */
+ #define WFCR_MAGICPS BIT(13) /* Magic packet status */
+ #define WFCR_WAKEFS BIT(14) /* Wakeup frame status */
+ #define WFCR_PMES BIT(15) /* PME pin status */
+#define P0_PSCR (0x0C)
+ #define PSCR_PS_MASK (0xFFF0)
+ #define PSCR_PS_D0 (0)
+ #define PSCR_PS_D1 BIT(0)
+ #define PSCR_PS_D2 BIT(1)
+ #define PSCR_FPS BIT(3) /* Enable fiber mode PS */
+ #define PSCR_SWPS BIT(4) /* Enable software */
+ /* PS control */
+ #define PSCR_WOLPS BIT(5) /* Enable WOL PS */
+ #define PSCR_SWWOL BIT(6) /* Enable software select */
+ /* WOL PS */
+ #define PSCR_PHYOSC BIT(7) /* Internal PHY OSC control */
+ #define PSCR_FOFEF BIT(8) /* Force PHY generate FEF */
+ #define PSCR_FOF BIT(9) /* Force PHY in fiber mode */
+ #define PSCR_PHYPD BIT(10) /* PHY power down. */
+ /* Active high */
+ #define PSCR_PHYRST BIT(11) /* PHY reset signal. */
+ /* Active low */
+ #define PSCR_PHYCSIL BIT(12) /* PHY cable energy detect */
+ #define PSCR_PHYCOFF BIT(13) /* PHY cable off */
+ #define PSCR_PHYLINK BIT(14) /* PHY link status */
+ #define PSCR_EEPOK BIT(15) /* EEPROM load complete */
+#define P0_MACCR (0x0E)
+ #define MACCR_RXEN BIT(0) /* Enable RX */
+ #define MACCR_DUPLEX_FULL BIT(1) /* 1: Full, 0: Half */
+ #define MACCR_SPEED_100 BIT(2) /* 1: 100Mbps, 0: 10Mbps */
+ #define MACCR_RXFC_ENABLE BIT(3)
+ #define MACCR_RXFC_MASK 0xFFF7
+ #define MACCR_TXFC_ENABLE BIT(4)
+ #define MACCR_TXFC_MASK 0xFFEF
+ #define MACCR_PSI BIT(6) /* Software Cable-Off */
+ /* Power Saving Interrupt */
+ #define MACCR_PF BIT(7)
+ #define MACCR_PMM_BITS 8
+ #define MACCR_PMM_MASK (0x1F00)
+ #define MACCR_PMM_RESET BIT(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 BIT(6)
+ #define TFBFCR_SET_FREE_PAGE(x) (((x) & 0x3F) << TFBFCR_FREE_PAGE_BITS)
+ #define TFBFCR_TX_PAGE_SET BIT(13)
+ #define TFBFCR_MANU_ENTX BIT(15)
+ #define TX_FREEBUF_MASK 0x003F
+ #define TX_DPTSTART 0x4000
+
+#define P0_TSNR (0x12)
+ #define TXNR_TXB_ERR BIT(5)
+ #define TXNR_TXB_IDLE BIT(6)
+ #define TSNR_PKT_CNT(x) (((x) & 0x3F) << 8)
+ #define TXNR_TXB_REINIT BIT(14)
+ #define TSNR_TXB_START BIT(15)
+#define P0_RTDPR (0x14)
+#define P0_RXBCR1 (0x16)
+ #define RXBCR1_RXB_DISCARD BIT(14)
+ #define RXBCR1_RXB_START BIT(15)
+#define P0_RXBCR2 (0x18)
+ #define RXBCR2_PKT_MASK (0xFF)
+ #define RXBCR2_RXPC_MASK (0x7F)
+ #define RXBCR2_RXB_READY BIT(13)
+ #define RXBCR2_RXB_IDLE BIT(14)
+ #define RXBCR2_RXB_REINIT BIT(15)
+#define P0_RTWCR (0x1A)
+ #define RTWCR_RXWC_MASK (0x3FFF)
+ #define RTWCR_RX_LATCH BIT(15)
+#define P0_RCPHR (0x1C)
+
+ /* Definition of PAGE1 */
+#define P1_RPPER (0x22)
+ #define RPPER_RXEN BIT(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 BIT(15)
+#define P1_MCR (0x32)
+ #define MCR_SBP BIT(8)
+ #define MCR_SM BIT(9)
+ #define MCR_CRCENLAN BIT(11)
+ #define MCR_STP BIT(12)
+ /* Definition of PAGE2 */
+#define P2_CIR (0x42)
+#define P2_PCR (0x44)
+ #define PCR_POLL_EN BIT(0)
+ #define PCR_POLL_FLOWCTRL BIT(1)
+ #define PCR_POLL_BMCR BIT(2)
+ #define PCR_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 BIT(13)
+ #define MDIOCR_READ BIT(14)
+ #define MDIOCR_WRITE BIT(15)
+#define P2_LCR0 (0x4C)
+ #define LCR_LED0_EN BIT(0)
+ #define LCR_LED0_100MODE BIT(1)
+ #define LCR_LED0_DUPLEX BIT(2)
+ #define LCR_LED0_LINK BIT(3)
+ #define LCR_LED0_ACT BIT(4)
+ #define LCR_LED0_COL BIT(5)
+ #define LCR_LED0_10MODE BIT(6)
+ #define LCR_LED0_DUPCOL BIT(7)
+ #define LCR_LED1_EN BIT(8)
+ #define LCR_LED1_100MODE BIT(9)
+ #define LCR_LED1_DUPLEX BIT(10)
+ #define LCR_LED1_LINK BIT(11)
+ #define LCR_LED1_ACT BIT(12)
+ #define LCR_LED1_COL BIT(13)
+ #define LCR_LED1_10MODE BIT(14)
+ #define LCR_LED1_DUPCOL BIT(15)
+#define P2_LCR1 (0x4E)
+ #define LCR_LED2_MASK (0xFF00)
+ #define LCR_LED2_EN BIT(0)
+ #define LCR_LED2_100MODE BIT(1)
+ #define LCR_LED2_DUPLEX BIT(2)
+ #define LCR_LED2_LINK BIT(3)
+ #define LCR_LED2_ACT BIT(4)
+ #define LCR_LED2_COL BIT(5)
+ #define LCR_LED2_10MODE BIT(6)
+ #define LCR_LED2_DUPCOL BIT(7)
+#define P2_IPGCR (0x50)
+#define P2_CRIR (0x52)
+#define P2_FLHWCR (0x54)
+#define P2_RXCR (0x56)
+ #define RXCR_PRO BIT(0)
+ #define RXCR_AMALL BIT(1)
+ #define RXCR_SEP BIT(2)
+ #define RXCR_AB BIT(3)
+ #define RXCR_AM BIT(4)
+ #define RXCR_AP BIT(5)
+ #define RXCR_ARP BIT(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 BIT(8)
+ #define EECR_WRITE_ACT BIT(9)
+ #define EECR_WRITE_DISABLE BIT(10)
+ #define EECR_WRITE_ENABLE BIT(11)
+ #define EECR_EE_READY BIT(13)
+ #define EECR_RELOAD BIT(14)
+ #define EECR_RESET BIT(15)
+#define P3_TPCR (0x7A)
+ #define TPCR_PATT_MASK (0xFF)
+ #define TPCR_RAND_PKT_EN BIT(14)
+ #define TPCR_FIXED_PKT_EN BIT(15)
+#define P3_TPLR (0x7C)
+ /* Definition of PAGE4 */
+#define P4_SPICR (0x8A)
+ #define SPICR_RCEN BIT(0)
+ #define SPICR_QCEN BIT(1)
+ #define SPICR_RBRE BIT(3)
+ #define SPICR_PMM BIT(4)
+ #define SPICR_LOOPBACK BIT(8)
+ #define SPICR_CORE_RES_CLR BIT(10)
+ #define SPICR_SPI_RES_CLR BIT(11)
+#define P4_SPIISMR (0x8C)
+
+#define P4_COERCR0 (0x92)
+ #define COERCR0_RXIPCE BIT(0)
+ #define COERCR0_RXIPVE BIT(1)
+ #define COERCR0_RXV6PE BIT(2)
+ #define COERCR0_RXTCPE BIT(3)
+ #define COERCR0_RXUDPE BIT(4)
+ #define COERCR0_RXICMP BIT(5)
+ #define COERCR0_RXIGMP BIT(6)
+ #define COERCR0_RXICV6 BIT(7)
+
+ #define COERCR0_RXTCPV6 BIT(8)
+ #define COERCR0_RXUDPV6 BIT(9)
+ #define COERCR0_RXICMV6 BIT(10)
+ #define COERCR0_RXIGMV6 BIT(11)
+ #define COERCR0_RXICV6V6 BIT(12)
+
+ #define COERCR0_DEFAULT (COERCR0_RXIPCE | COERCR0_RXV6PE | \
+ COERCR0_RXTCPE | COERCR0_RXUDPE | \
+ COERCR0_RXTCPV6 | COERCR0_RXUDPV6)
+#define P4_COERCR1 (0x94)
+ #define COERCR1_IPCEDP BIT(0)
+ #define COERCR1_IPVEDP BIT(1)
+ #define COERCR1_V6VEDP BIT(2)
+ #define COERCR1_TCPEDP BIT(3)
+ #define COERCR1_UDPEDP BIT(4)
+ #define COERCR1_ICMPDP BIT(5)
+ #define COERCR1_IGMPDP BIT(6)
+ #define COERCR1_ICV6DP BIT(7)
+ #define COERCR1_RX64TE BIT(8)
+ #define COERCR1_RXPPPE BIT(9)
+ #define COERCR1_TCP6DP BIT(10)
+ #define COERCR1_UDP6DP BIT(11)
+ #define COERCR1_IC6DP BIT(12)
+ #define COERCR1_IG6DP BIT(13)
+ #define COERCR1_ICV66DP BIT(14)
+ #define COERCR1_RPCE BIT(15)
+
+ #define COERCR1_DEFAULT (COERCR1_RXPPPE)
+
+#define P4_COETCR0 (0x96)
+ #define COETCR0_TXIP BIT(0)
+ #define COETCR0_TXTCP BIT(1)
+ #define COETCR0_TXUDP BIT(2)
+ #define COETCR0_TXICMP BIT(3)
+ #define COETCR0_TXIGMP BIT(4)
+ #define COETCR0_TXICV6 BIT(5)
+ #define COETCR0_TXTCPV6 BIT(8)
+ #define COETCR0_TXUDPV6 BIT(9)
+ #define COETCR0_TXICMV6 BIT(10)
+ #define COETCR0_TXIGMV6 BIT(11)
+ #define COETCR0_TXICV6V6 BIT(12)
+
+ #define COETCR0_DEFAULT (COETCR0_TXIP | COETCR0_TXTCP | \
+ COETCR0_TXUDP | COETCR0_TXTCPV6 | \
+ COETCR0_TXUDPV6)
+#define P4_COETCR1 (0x98)
+ #define COETCR1_TX64TE BIT(0)
+ #define COETCR1_TXPPPE BIT(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 BIT(0)
+ #define WFCR03_F1_EN BIT(4)
+ #define WFCR03_F2_EN BIT(8)
+ #define WFCR03_F3_EN BIT(12)
+#define P5_WFCR47 (0xA8)
+ #define WFCR47_F4_EN BIT(0)
+ #define WFCR47_F5_EN BIT(4)
+ #define WFCR47_F6_EN BIT(8)
+ #define WFCR47_F7_EN BIT(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;
+};
+
+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;
+};
+
+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;
+};
+
+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;
+};
+
+/* Rx headers structure */
+struct rx_header {
+ u16 flags_len;
+ u16 seq_lenbar;
+ u16 flags;
+};
+
+extern unsigned long ax88796c_no_regs_mask[];
+
+#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..1252a97d1c52
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_spi.c
@@ -0,0 +1,115 @@
+// 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
+ */
+
+#define pr_fmt(fmt) "ax88796c: " fmt
+
+#include <linux/string.h>
+#include <linux/spi/spi.h>
+
+#include "ax88796c_spi.h"
+
+const u8 ax88796c_rx_cmd_buf[5] = {AX_SPICMD_READ_RXQ, 0xFF, 0xFF, 0xFF, 0xFF};
+const u8 ax88796c_tx_cmd_buf[4] = {AX_SPICMD_WRITE_TXQ, 0xFF, 0xFF, 0xFF};
+
+/* driver bus management functions */
+int axspi_wakeup(struct axspi_data *ax_spi)
+{
+ int ret;
+
+ ax_spi->cmd_buf[0] = AX_SPICMD_EXIT_PWD; /* OP */
+ ret = spi_write(ax_spi->spi, ax_spi->cmd_buf, 1);
+ if (ret)
+ dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret);
+ return ret;
+}
+
+int axspi_read_status(struct axspi_data *ax_spi, struct spi_status *status)
+{
+ int ret;
+
+ /* OP */
+ ax_spi->cmd_buf[0] = AX_SPICMD_READ_STATUS;
+ ret = spi_write_then_read(ax_spi->spi, ax_spi->cmd_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);
+
+ return ret;
+}
+
+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, ax88796c_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(const 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)
+{
+ int ret;
+ int len = ax_spi->comp ? 3 : 4;
+
+ ax_spi->cmd_buf[0] = 0x03; /* OP code read register */
+ ax_spi->cmd_buf[1] = reg; /* register address */
+ ax_spi->cmd_buf[2] = 0xFF; /* dumy cycle */
+ ax_spi->cmd_buf[3] = 0xFF; /* dumy cycle */
+ ret = spi_write_then_read(ax_spi->spi,
+ ax_spi->cmd_buf, len,
+ ax_spi->rx_buf, 2);
+ if (ret) {
+ dev_err(&ax_spi->spi->dev,
+ "%s() failed: ret = %d\n", __func__, ret);
+ return 0xFFFF;
+ }
+
+ le16_to_cpus(ax_spi->rx_buf);
+
+ return *(u16 *)ax_spi->rx_buf;
+}
+
+int axspi_write_reg(struct axspi_data *ax_spi, u8 reg, u16 value)
+{
+ int ret;
+
+ memset(ax_spi->cmd_buf, 0, sizeof(ax_spi->cmd_buf));
+ ax_spi->cmd_buf[0] = AX_SPICMD_WRITE_REG; /* OP code read register */
+ ax_spi->cmd_buf[1] = reg; /* register address */
+ ax_spi->cmd_buf[2] = value;
+ ax_spi->cmd_buf[3] = value >> 8;
+
+ ret = spi_write(ax_spi->spi, ax_spi->cmd_buf, 4);
+ if (ret)
+ dev_err(&ax_spi->spi->dev, "%s() failed: ret = %d\n", __func__, ret);
+ return 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..5bcf91f603fb
--- /dev/null
+++ b/drivers/net/ethernet/asix/ax88796c_spi.h
@@ -0,0 +1,69 @@
+/* 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
+ */
+
+#ifndef _AX88796C_SPI_H
+#define _AX88796C_SPI_H
+
+#include <linux/spi/spi.h>
+#include <linux/types.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
+
+extern const u8 ax88796c_rx_cmd_buf[];
+extern const u8 ax88796c_tx_cmd_buf[];
+
+struct axspi_data {
+ struct spi_device *spi;
+ struct spi_message rx_msg;
+ struct spi_transfer spi_rx_xfer[2];
+ u8 cmd_buf[6];
+ u8 rx_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(const struct axspi_data *ax_spi, void *data, int len);
+u16 axspi_read_reg(struct axspi_data *ax_spi, u8 reg);
+int axspi_write_reg(struct axspi_data *ax_spi, u8 reg, u16 value);
+int axspi_read_status(struct axspi_data *ax_spi, struct spi_status *status);
+int 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 int AX_WRITE(struct axspi_data *ax_spi, u16 value, u8 offset)
+{
+ return axspi_write_reg(ax_spi, offset, value);
+}
+
+static inline int AX_READ_STATUS(struct axspi_data *ax_spi,
+ struct spi_status *status)
+{
+ return axspi_read_status(ax_spi, status);
+}
+
+static inline int AX_WAKEUP(struct axspi_data *ax_spi)
+{
+ return axspi_wakeup(ax_spi);
+}
+#endif
--
2.26.2
Add bindings for AX88796C SPI Ethernet Adapter.
Signed-off-by: Łukasz Stelmach <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Acked-by: Krzysztof Kozlowski <[email protected]>
---
.../bindings/net/asix,ax88796c.yaml | 73 +++++++++++++++++++
1 file changed, 73 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/asix,ax88796c.yaml
diff --git a/Documentation/devicetree/bindings/net/asix,ax88796c.yaml b/Documentation/devicetree/bindings/net/asix,ax88796c.yaml
new file mode 100644
index 000000000000..699ebf452479
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/asix,ax88796c.yaml
@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/asix,ax88796c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASIX AX88796C SPI Ethernet Adapter
+
+maintainers:
+ - Łukasz Stelmach <[email protected]>
+
+description: |
+ ASIX AX88796C is an Ethernet controller with a built in PHY. This
+ describes SPI mode of the chip.
+
+ The node for this driver must be a child node of an SPI controller,
+ hence all mandatory properties described in
+ ../spi/spi-controller.yaml must be specified.
+
+allOf:
+ - $ref: ethernet-controller.yaml#
+
+properties:
+ compatible:
+ const: asix,ax88796c
+
+ reg:
+ maxItems: 1
+
+ spi-max-frequency:
+ maximum: 40000000
+
+ interrupts:
+ maxItems: 1
+
+ reset-gpios:
+ description:
+ A GPIO line handling reset of the chip. As the line is active low,
+ it should be marked GPIO_ACTIVE_LOW.
+ maxItems: 1
+
+ local-mac-address: true
+
+ mac-address: true
+
+required:
+ - compatible
+ - reg
+ - spi-max-frequency
+ - interrupts
+ - reset-gpios
+
+additionalProperties: false
+
+examples:
+ # Artik5 eval board
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/gpio/gpio.h>
+ spi0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ethernet@0 {
+ compatible = "asix,ax88796c";
+ reg = <0x0>;
+ local-mac-address = [00 00 00 00 00 00]; /* Filled in by a bootloader */
+ interrupt-parent = <&gpx2>;
+ interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+ spi-max-frequency = <40000000>;
+ reset-gpios = <&gpe0 2 GPIO_ACTIVE_LOW>;
+ };
+ };
--
2.26.2
It was <2021-03-02 wto 16:22>, when Łukasz Stelmach wrote:
> This is a driver for AX88796C Ethernet Adapter connected in SPI mode as
> found on ARTIK5 evaluation board. The driver has been ported from a
> v3.10.9 vendor kernel for ARTIK5 board.
>
> Changes in v11:
> - changed stat counters to 64-bit
> - replaced WARN_ON(!mutex_is_locked()) with lockdep_assert_held()
> - replaced ax88796c_free_skb_queue() with __skb_queue_purge()
> - added cancel_work_sync() for ax_work
> - removed unused fields of struct skb_data
> - replaced MAX() with max() from minmax.h
> - rebased to net-next (resend)
[…]
Hi,
What is current status? Should I rebase once more?
Kind regards,
--
Łukasz Stelmach
Samsung R&D Institute Poland
Samsung Electronics
On Wed, 05 May 2021 19:11:39 +0200 Łukasz Stelmach wrote:
> It was <2021-03-02 wto 16:22>, when Łukasz Stelmach wrote:
> > This is a driver for AX88796C Ethernet Adapter connected in SPI mode as
> > found on ARTIK5 evaluation board. The driver has been ported from a
> > v3.10.9 vendor kernel for ARTIK5 board.
> >
> > Changes in v11:
> > - changed stat counters to 64-bit
> > - replaced WARN_ON(!mutex_is_locked()) with lockdep_assert_held()
> > - replaced ax88796c_free_skb_queue() with __skb_queue_purge()
> > - added cancel_work_sync() for ax_work
> > - removed unused fields of struct skb_data
> > - replaced MAX() with max() from minmax.h
> > - rebased to net-next (resend)
>
> Hi,
>
> What is current status? Should I rebase once more?
Unfortunately it seems so :( The patches got marked as Not Applicable
in patchwork. And now we are once again in the merge window period.
Please repost late next week, and make sure to prefix the subjects with
[PATCH net-next v12], this will hopefully prevent mis-categorization.
Looking at the code again is the use of netif_stop_queue(ndev) in
ax88796c_close() not a little racy? The work may be running in parallel
and immediately re-enable the queue.