Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 588 insertions, 0 deletions

diff --git a/drivers/mtd/nand/raw/mxic_nand.c b/drivers/mtd/nand/raw/mxic_nand.c
new file mode 100644
index 000000000..da1070993
--- /dev/null
+++ b/drivers/mtd/nand/raw/mxic_nand.c
@@ -0,0 +1,588 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Macronix International Co., Ltd.
+ *
+ * Author:
+ *	Mason Yang <masonccyang@mxic.com.tw>
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand-ecc-sw-hamming.h>
+#include <linux/mtd/rawnand.h>
+#include <linux/platform_device.h>
+
+#include "internals.h"
+
+#define HC_CFG			0x0
+#define HC_CFG_IF_CFG(x)	((x) << 27)
+#define HC_CFG_DUAL_SLAVE	BIT(31)
+#define HC_CFG_INDIVIDUAL	BIT(30)
+#define HC_CFG_NIO(x)		(((x) / 4) << 27)
+#define HC_CFG_TYPE(s, t)	((t) << (23 + ((s) * 2)))
+#define HC_CFG_TYPE_SPI_NOR	0
+#define HC_CFG_TYPE_SPI_NAND	1
+#define HC_CFG_TYPE_SPI_RAM	2
+#define HC_CFG_TYPE_RAW_NAND	3
+#define HC_CFG_SLV_ACT(x)	((x) << 21)
+#define HC_CFG_CLK_PH_EN	BIT(20)
+#define HC_CFG_CLK_POL_INV	BIT(19)
+#define HC_CFG_BIG_ENDIAN	BIT(18)
+#define HC_CFG_DATA_PASS	BIT(17)
+#define HC_CFG_IDLE_SIO_LVL(x)	((x) << 16)
+#define HC_CFG_MAN_START_EN	BIT(3)
+#define HC_CFG_MAN_START	BIT(2)
+#define HC_CFG_MAN_CS_EN	BIT(1)
+#define HC_CFG_MAN_CS_ASSERT	BIT(0)
+
+#define INT_STS			0x4
+#define INT_STS_EN		0x8
+#define INT_SIG_EN		0xc
+#define INT_STS_ALL		GENMASK(31, 0)
+#define INT_RDY_PIN		BIT(26)
+#define INT_RDY_SR		BIT(25)
+#define INT_LNR_SUSP		BIT(24)
+#define INT_ECC_ERR		BIT(17)
+#define INT_CRC_ERR		BIT(16)
+#define INT_LWR_DIS		BIT(12)
+#define INT_LRD_DIS		BIT(11)
+#define INT_SDMA_INT		BIT(10)
+#define INT_DMA_FINISH		BIT(9)
+#define INT_RX_NOT_FULL		BIT(3)
+#define INT_RX_NOT_EMPTY	BIT(2)
+#define INT_TX_NOT_FULL		BIT(1)
+#define INT_TX_EMPTY		BIT(0)
+
+#define HC_EN			0x10
+#define HC_EN_BIT		BIT(0)
+
+#define TXD(x)			(0x14 + ((x) * 4))
+#define RXD			0x24
+
+#define SS_CTRL(s)		(0x30 + ((s) * 4))
+#define LRD_CFG			0x44
+#define LWR_CFG			0x80
+#define RWW_CFG			0x70
+#define OP_READ			BIT(23)
+#define OP_DUMMY_CYC(x)		((x) << 17)
+#define OP_ADDR_BYTES(x)	((x) << 14)
+#define OP_CMD_BYTES(x)		(((x) - 1) << 13)
+#define OP_OCTA_CRC_EN		BIT(12)
+#define OP_DQS_EN		BIT(11)
+#define OP_ENHC_EN		BIT(10)
+#define OP_PREAMBLE_EN		BIT(9)
+#define OP_DATA_DDR		BIT(8)
+#define OP_DATA_BUSW(x)		((x) << 6)
+#define OP_ADDR_DDR		BIT(5)
+#define OP_ADDR_BUSW(x)		((x) << 3)
+#define OP_CMD_DDR		BIT(2)
+#define OP_CMD_BUSW(x)		(x)
+#define OP_BUSW_1		0
+#define OP_BUSW_2		1
+#define OP_BUSW_4		2
+#define OP_BUSW_8		3
+
+#define OCTA_CRC		0x38
+#define OCTA_CRC_IN_EN(s)	BIT(3 + ((s) * 16))
+#define OCTA_CRC_CHUNK(s, x)	((fls((x) / 32)) << (1 + ((s) * 16)))
+#define OCTA_CRC_OUT_EN(s)	BIT(0 + ((s) * 16))
+
+#define ONFI_DIN_CNT(s)		(0x3c + (s))
+
+#define LRD_CTRL		0x48
+#define RWW_CTRL		0x74
+#define LWR_CTRL		0x84
+#define LMODE_EN		BIT(31)
+#define LMODE_SLV_ACT(x)	((x) << 21)
+#define LMODE_CMD1(x)		((x) << 8)
+#define LMODE_CMD0(x)		(x)
+
+#define LRD_ADDR		0x4c
+#define LWR_ADDR		0x88
+#define LRD_RANGE		0x50
+#define LWR_RANGE		0x8c
+
+#define AXI_SLV_ADDR		0x54
+
+#define DMAC_RD_CFG		0x58
+#define DMAC_WR_CFG		0x94
+#define DMAC_CFG_PERIPH_EN	BIT(31)
+#define DMAC_CFG_ALLFLUSH_EN	BIT(30)
+#define DMAC_CFG_LASTFLUSH_EN	BIT(29)
+#define DMAC_CFG_QE(x)		(((x) + 1) << 16)
+#define DMAC_CFG_BURST_LEN(x)	(((x) + 1) << 12)
+#define DMAC_CFG_BURST_SZ(x)	((x) << 8)
+#define DMAC_CFG_DIR_READ	BIT(1)
+#define DMAC_CFG_START		BIT(0)
+
+#define DMAC_RD_CNT		0x5c
+#define DMAC_WR_CNT		0x98
+
+#define SDMA_ADDR		0x60
+
+#define DMAM_CFG		0x64
+#define DMAM_CFG_START		BIT(31)
+#define DMAM_CFG_CONT		BIT(30)
+#define DMAM_CFG_SDMA_GAP(x)	(fls((x) / 8192) << 2)
+#define DMAM_CFG_DIR_READ	BIT(1)
+#define DMAM_CFG_EN		BIT(0)
+
+#define DMAM_CNT		0x68
+
+#define LNR_TIMER_TH		0x6c
+
+#define RDM_CFG0		0x78
+#define RDM_CFG0_POLY(x)	(x)
+
+#define RDM_CFG1		0x7c
+#define RDM_CFG1_RDM_EN		BIT(31)
+#define RDM_CFG1_SEED(x)	(x)
+
+#define LWR_SUSP_CTRL		0x90
+#define LWR_SUSP_CTRL_EN	BIT(31)
+
+#define DMAS_CTRL		0x9c
+#define DMAS_CTRL_EN		BIT(31)
+#define DMAS_CTRL_DIR_READ	BIT(30)
+
+#define DATA_STROB		0xa0
+#define DATA_STROB_EDO_EN	BIT(2)
+#define DATA_STROB_INV_POL	BIT(1)
+#define DATA_STROB_DELAY_2CYC	BIT(0)
+
+#define IDLY_CODE(x)		(0xa4 + ((x) * 4))
+#define IDLY_CODE_VAL(x, v)	((v) << (((x) % 4) * 8))
+
+#define GPIO			0xc4
+#define GPIO_PT(x)		BIT(3 + ((x) * 16))
+#define GPIO_RESET(x)		BIT(2 + ((x) * 16))
+#define GPIO_HOLDB(x)		BIT(1 + ((x) * 16))
+#define GPIO_WPB(x)		BIT((x) * 16)
+
+#define HC_VER			0xd0
+
+#define HW_TEST(x)		(0xe0 + ((x) * 4))
+
+#define MXIC_NFC_MAX_CLK_HZ	50000000
+#define IRQ_TIMEOUT		1000
+
+struct mxic_nand_ctlr {
+	struct clk *ps_clk;
+	struct clk *send_clk;
+	struct clk *send_dly_clk;
+	struct completion complete;
+	void __iomem *regs;
+	struct nand_controller controller;
+	struct device *dev;
+	struct nand_chip chip;
+};
+
+static int mxic_nfc_clk_enable(struct mxic_nand_ctlr *nfc)
+{
+	int ret;
+
+	ret = clk_prepare_enable(nfc->ps_clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(nfc->send_clk);
+	if (ret)
+		goto err_ps_clk;
+
+	ret = clk_prepare_enable(nfc->send_dly_clk);
+	if (ret)
+		goto err_send_dly_clk;
+
+	return ret;
+
+err_send_dly_clk:
+	clk_disable_unprepare(nfc->send_clk);
+err_ps_clk:
+	clk_disable_unprepare(nfc->ps_clk);
+
+	return ret;
+}
+
+static void mxic_nfc_clk_disable(struct mxic_nand_ctlr *nfc)
+{
+	clk_disable_unprepare(nfc->send_clk);
+	clk_disable_unprepare(nfc->send_dly_clk);
+	clk_disable_unprepare(nfc->ps_clk);
+}
+
+static void mxic_nfc_set_input_delay(struct mxic_nand_ctlr *nfc, u8 idly_code)
+{
+	writel(IDLY_CODE_VAL(0, idly_code) |
+	       IDLY_CODE_VAL(1, idly_code) |
+	       IDLY_CODE_VAL(2, idly_code) |
+	       IDLY_CODE_VAL(3, idly_code),
+	       nfc->regs + IDLY_CODE(0));
+	writel(IDLY_CODE_VAL(4, idly_code) |
+	       IDLY_CODE_VAL(5, idly_code) |
+	       IDLY_CODE_VAL(6, idly_code) |
+	       IDLY_CODE_VAL(7, idly_code),
+	       nfc->regs + IDLY_CODE(1));
+}
+
+static int mxic_nfc_clk_setup(struct mxic_nand_ctlr *nfc, unsigned long freq)
+{
+	int ret;
+
+	ret = clk_set_rate(nfc->send_clk, freq);
+	if (ret)
+		return ret;
+
+	ret = clk_set_rate(nfc->send_dly_clk, freq);
+	if (ret)
+		return ret;
+
+	/*
+	 * A constant delay range from 0x0 ~ 0x1F for input delay,
+	 * the unit is 78 ps, the max input delay is 2.418 ns.
+	 */
+	mxic_nfc_set_input_delay(nfc, 0xf);
+
+	/*
+	 * Phase degree = 360 * freq * output-delay
+	 * where output-delay is a constant value 1 ns in FPGA.
+	 *
+	 * Get Phase degree = 360 * freq * 1 ns
+	 *                  = 360 * freq * 1 sec / 1000000000
+	 *                  = 9 * freq / 25000000
+	 */
+	ret = clk_set_phase(nfc->send_dly_clk, 9 * freq / 25000000);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int mxic_nfc_set_freq(struct mxic_nand_ctlr *nfc, unsigned long freq)
+{
+	int ret;
+
+	if (freq > MXIC_NFC_MAX_CLK_HZ)
+		freq = MXIC_NFC_MAX_CLK_HZ;
+
+	mxic_nfc_clk_disable(nfc);
+	ret = mxic_nfc_clk_setup(nfc, freq);
+	if (ret)
+		return ret;
+
+	ret = mxic_nfc_clk_enable(nfc);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static irqreturn_t mxic_nfc_isr(int irq, void *dev_id)
+{
+	struct mxic_nand_ctlr *nfc = dev_id;
+	u32 sts;
+
+	sts = readl(nfc->regs + INT_STS);
+	if (sts & INT_RDY_PIN)
+		complete(&nfc->complete);
+	else
+		return IRQ_NONE;
+
+	return IRQ_HANDLED;
+}
+
+static void mxic_nfc_hw_init(struct mxic_nand_ctlr *nfc)
+{
+	writel(HC_CFG_NIO(8) | HC_CFG_TYPE(1, HC_CFG_TYPE_RAW_NAND) |
+	       HC_CFG_SLV_ACT(0) | HC_CFG_MAN_CS_EN |
+	       HC_CFG_IDLE_SIO_LVL(1), nfc->regs + HC_CFG);
+	writel(INT_STS_ALL, nfc->regs + INT_STS_EN);
+	writel(INT_RDY_PIN, nfc->regs + INT_SIG_EN);
+	writel(0x0, nfc->regs + ONFI_DIN_CNT(0));
+	writel(0, nfc->regs + LRD_CFG);
+	writel(0, nfc->regs + LRD_CTRL);
+	writel(0x0, nfc->regs + HC_EN);
+}
+
+static void mxic_nfc_cs_enable(struct mxic_nand_ctlr *nfc)
+{
+	writel(readl(nfc->regs + HC_CFG) | HC_CFG_MAN_CS_EN,
+	       nfc->regs + HC_CFG);
+	writel(HC_CFG_MAN_CS_ASSERT | readl(nfc->regs + HC_CFG),
+	       nfc->regs + HC_CFG);
+}
+
+static void mxic_nfc_cs_disable(struct mxic_nand_ctlr *nfc)
+{
+	writel(~HC_CFG_MAN_CS_ASSERT & readl(nfc->regs + HC_CFG),
+	       nfc->regs + HC_CFG);
+}
+
+static int  mxic_nfc_wait_ready(struct nand_chip *chip)
+{
+	struct mxic_nand_ctlr *nfc = nand_get_controller_data(chip);
+	int ret;
+
+	ret = wait_for_completion_timeout(&nfc->complete,
+					  msecs_to_jiffies(IRQ_TIMEOUT));
+	if (!ret) {
+		dev_err(nfc->dev, "nand device timeout\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static int mxic_nfc_data_xfer(struct mxic_nand_ctlr *nfc, const void *txbuf,
+			      void *rxbuf, unsigned int len)
+{
+	unsigned int pos = 0;
+
+	while (pos < len) {
+		unsigned int nbytes = len - pos;
+		u32 data = 0xffffffff;
+		u32 sts;
+		int ret;
+
+		if (nbytes > 4)
+			nbytes = 4;
+
+		if (txbuf)
+			memcpy(&data, txbuf + pos, nbytes);
+
+		ret = readl_poll_timeout(nfc->regs + INT_STS, sts,
+					 sts & INT_TX_EMPTY, 0, USEC_PER_SEC);
+		if (ret)
+			return ret;
+
+		writel(data, nfc->regs + TXD(nbytes % 4));
+
+		ret = readl_poll_timeout(nfc->regs + INT_STS, sts,
+					 sts & INT_TX_EMPTY, 0, USEC_PER_SEC);
+		if (ret)
+			return ret;
+
+		ret = readl_poll_timeout(nfc->regs + INT_STS, sts,
+					 sts & INT_RX_NOT_EMPTY, 0,
+					 USEC_PER_SEC);
+		if (ret)
+			return ret;
+
+		data = readl(nfc->regs + RXD);
+		if (rxbuf) {
+			data >>= (8 * (4 - nbytes));
+			memcpy(rxbuf + pos, &data, nbytes);
+		}
+		if (readl(nfc->regs + INT_STS) & INT_RX_NOT_EMPTY)
+			dev_warn(nfc->dev, "RX FIFO not empty\n");
+
+		pos += nbytes;
+	}
+
+	return 0;
+}
+
+static int mxic_nfc_exec_op(struct nand_chip *chip,
+			    const struct nand_operation *op, bool check_only)
+{
+	struct mxic_nand_ctlr *nfc = nand_get_controller_data(chip);
+	const struct nand_op_instr *instr = NULL;
+	int ret = 0;
+	unsigned int op_id;
+
+	if (check_only)
+		return 0;
+
+	mxic_nfc_cs_enable(nfc);
+	init_completion(&nfc->complete);
+	for (op_id = 0; op_id < op->ninstrs; op_id++) {
+		instr = &op->instrs[op_id];
+
+		switch (instr->type) {
+		case NAND_OP_CMD_INSTR:
+			writel(0, nfc->regs + HC_EN);
+			writel(HC_EN_BIT, nfc->regs + HC_EN);
+			writel(OP_CMD_BUSW(OP_BUSW_8) |  OP_DUMMY_CYC(0x3F) |
+			       OP_CMD_BYTES(0), nfc->regs + SS_CTRL(0));
+
+			ret = mxic_nfc_data_xfer(nfc,
+						 &instr->ctx.cmd.opcode,
+						 NULL, 1);
+			break;
+
+		case NAND_OP_ADDR_INSTR:
+			writel(OP_ADDR_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) |
+			       OP_ADDR_BYTES(instr->ctx.addr.naddrs),
+			       nfc->regs + SS_CTRL(0));
+			ret = mxic_nfc_data_xfer(nfc,
+						 instr->ctx.addr.addrs, NULL,
+						 instr->ctx.addr.naddrs);
+			break;
+
+		case NAND_OP_DATA_IN_INSTR:
+			writel(0x0, nfc->regs + ONFI_DIN_CNT(0));
+			writel(OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) |
+			       OP_READ, nfc->regs + SS_CTRL(0));
+			ret = mxic_nfc_data_xfer(nfc, NULL,
+						 instr->ctx.data.buf.in,
+						 instr->ctx.data.len);
+			break;
+
+		case NAND_OP_DATA_OUT_INSTR:
+			writel(instr->ctx.data.len,
+			       nfc->regs + ONFI_DIN_CNT(0));
+			writel(OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F),
+			       nfc->regs + SS_CTRL(0));
+			ret = mxic_nfc_data_xfer(nfc,
+						 instr->ctx.data.buf.out, NULL,
+						 instr->ctx.data.len);
+			break;
+
+		case NAND_OP_WAITRDY_INSTR:
+			ret = mxic_nfc_wait_ready(chip);
+			break;
+		}
+	}
+	mxic_nfc_cs_disable(nfc);
+
+	return ret;
+}
+
+static int mxic_nfc_setup_interface(struct nand_chip *chip, int chipnr,
+				    const struct nand_interface_config *conf)
+{
+	struct mxic_nand_ctlr *nfc = nand_get_controller_data(chip);
+	const struct nand_sdr_timings *sdr;
+	unsigned long freq;
+	int ret;
+
+	sdr = nand_get_sdr_timings(conf);
+	if (IS_ERR(sdr))
+		return PTR_ERR(sdr);
+
+	if (chipnr == NAND_DATA_IFACE_CHECK_ONLY)
+		return 0;
+
+	freq = NSEC_PER_SEC / (sdr->tRC_min / 1000);
+
+	ret =  mxic_nfc_set_freq(nfc, freq);
+	if (ret)
+		dev_err(nfc->dev, "set freq:%ld failed\n", freq);
+
+	if (sdr->tRC_min < 30000)
+		writel(DATA_STROB_EDO_EN, nfc->regs + DATA_STROB);
+
+	return 0;
+}
+
+static const struct nand_controller_ops mxic_nand_controller_ops = {
+	.exec_op = mxic_nfc_exec_op,
+	.setup_interface = mxic_nfc_setup_interface,
+};
+
+static int mxic_nfc_probe(struct platform_device *pdev)
+{
+	struct device_node *nand_np, *np = pdev->dev.of_node;
+	struct mtd_info *mtd;
+	struct mxic_nand_ctlr *nfc;
+	struct nand_chip *nand_chip;
+	int err;
+	int irq;
+
+	nfc = devm_kzalloc(&pdev->dev, sizeof(struct mxic_nand_ctlr),
+			   GFP_KERNEL);
+	if (!nfc)
+		return -ENOMEM;
+
+	nfc->ps_clk = devm_clk_get(&pdev->dev, "ps");
+	if (IS_ERR(nfc->ps_clk))
+		return PTR_ERR(nfc->ps_clk);
+
+	nfc->send_clk = devm_clk_get(&pdev->dev, "send");
+	if (IS_ERR(nfc->send_clk))
+		return PTR_ERR(nfc->send_clk);
+
+	nfc->send_dly_clk = devm_clk_get(&pdev->dev, "send_dly");
+	if (IS_ERR(nfc->send_dly_clk))
+		return PTR_ERR(nfc->send_dly_clk);
+
+	nfc->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(nfc->regs))
+		return PTR_ERR(nfc->regs);
+
+	nand_chip = &nfc->chip;
+	mtd = nand_to_mtd(nand_chip);
+	mtd->dev.parent = &pdev->dev;
+
+	for_each_child_of_node(np, nand_np)
+		nand_set_flash_node(nand_chip, nand_np);
+
+	nand_chip->priv = nfc;
+	nfc->dev = &pdev->dev;
+	nfc->controller.ops = &mxic_nand_controller_ops;
+	nand_controller_init(&nfc->controller);
+	nand_chip->controller = &nfc->controller;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	mxic_nfc_hw_init(nfc);
+
+	err = devm_request_irq(&pdev->dev, irq, mxic_nfc_isr,
+			       0, "mxic-nfc", nfc);
+	if (err)
+		goto fail;
+
+	err = nand_scan(nand_chip, 1);
+	if (err)
+		goto fail;
+
+	err = mtd_device_register(mtd, NULL, 0);
+	if (err)
+		goto fail;
+
+	platform_set_drvdata(pdev, nfc);
+	return 0;
+
+fail:
+	mxic_nfc_clk_disable(nfc);
+	return err;
+}
+
+static int mxic_nfc_remove(struct platform_device *pdev)
+{
+	struct mxic_nand_ctlr *nfc = platform_get_drvdata(pdev);
+	struct nand_chip *chip = &nfc->chip;
+	int ret;
+
+	ret = mtd_device_unregister(nand_to_mtd(chip));
+	WARN_ON(ret);
+	nand_cleanup(chip);
+
+	mxic_nfc_clk_disable(nfc);
+	return 0;
+}
+
+static const struct of_device_id mxic_nfc_of_ids[] = {
+	{ .compatible = "mxic,multi-itfc-v009-nand-controller", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mxic_nfc_of_ids);
+
+static struct platform_driver mxic_nfc_driver = {
+	.probe = mxic_nfc_probe,
+	.remove = mxic_nfc_remove,
+	.driver = {
+		.name = "mxic-nfc",
+		.of_match_table = mxic_nfc_of_ids,
+	},
+};
+module_platform_driver(mxic_nfc_driver);
+
+MODULE_AUTHOR("Mason Yang <masonccyang@mxic.com.tw>");
+MODULE_DESCRIPTION("Macronix raw NAND controller driver");
+MODULE_LICENSE("GPL v2");