From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/mtd/spi-nor/controllers/hisi-sfc.c | 497 +++++++++++++++++++++++++++++ 1 file changed, 497 insertions(+) create mode 100644 drivers/mtd/spi-nor/controllers/hisi-sfc.c (limited to 'drivers/mtd/spi-nor/controllers/hisi-sfc.c') diff --git a/drivers/mtd/spi-nor/controllers/hisi-sfc.c b/drivers/mtd/spi-nor/controllers/hisi-sfc.c new file mode 100644 index 000000000..5070d7283 --- /dev/null +++ b/drivers/mtd/spi-nor/controllers/hisi-sfc.c @@ -0,0 +1,497 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * HiSilicon FMC SPI NOR flash controller driver + * + * Copyright (c) 2015-2016 HiSilicon Technologies Co., Ltd. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Hardware register offsets and field definitions */ +#define FMC_CFG 0x00 +#define FMC_CFG_OP_MODE_MASK BIT_MASK(0) +#define FMC_CFG_OP_MODE_BOOT 0 +#define FMC_CFG_OP_MODE_NORMAL 1 +#define FMC_CFG_FLASH_SEL(type) (((type) & 0x3) << 1) +#define FMC_CFG_FLASH_SEL_MASK 0x6 +#define FMC_ECC_TYPE(type) (((type) & 0x7) << 5) +#define FMC_ECC_TYPE_MASK GENMASK(7, 5) +#define SPI_NOR_ADDR_MODE_MASK BIT_MASK(10) +#define SPI_NOR_ADDR_MODE_3BYTES (0x0 << 10) +#define SPI_NOR_ADDR_MODE_4BYTES (0x1 << 10) +#define FMC_GLOBAL_CFG 0x04 +#define FMC_GLOBAL_CFG_WP_ENABLE BIT(6) +#define FMC_SPI_TIMING_CFG 0x08 +#define TIMING_CFG_TCSH(nr) (((nr) & 0xf) << 8) +#define TIMING_CFG_TCSS(nr) (((nr) & 0xf) << 4) +#define TIMING_CFG_TSHSL(nr) ((nr) & 0xf) +#define CS_HOLD_TIME 0x6 +#define CS_SETUP_TIME 0x6 +#define CS_DESELECT_TIME 0xf +#define FMC_INT 0x18 +#define FMC_INT_OP_DONE BIT(0) +#define FMC_INT_CLR 0x20 +#define FMC_CMD 0x24 +#define FMC_CMD_CMD1(cmd) ((cmd) & 0xff) +#define FMC_ADDRL 0x2c +#define FMC_OP_CFG 0x30 +#define OP_CFG_FM_CS(cs) ((cs) << 11) +#define OP_CFG_MEM_IF_TYPE(type) (((type) & 0x7) << 7) +#define OP_CFG_ADDR_NUM(addr) (((addr) & 0x7) << 4) +#define OP_CFG_DUMMY_NUM(dummy) ((dummy) & 0xf) +#define FMC_DATA_NUM 0x38 +#define FMC_DATA_NUM_CNT(cnt) ((cnt) & GENMASK(13, 0)) +#define FMC_OP 0x3c +#define FMC_OP_DUMMY_EN BIT(8) +#define FMC_OP_CMD1_EN BIT(7) +#define FMC_OP_ADDR_EN BIT(6) +#define FMC_OP_WRITE_DATA_EN BIT(5) +#define FMC_OP_READ_DATA_EN BIT(2) +#define FMC_OP_READ_STATUS_EN BIT(1) +#define FMC_OP_REG_OP_START BIT(0) +#define FMC_DMA_LEN 0x40 +#define FMC_DMA_LEN_SET(len) ((len) & GENMASK(27, 0)) +#define FMC_DMA_SADDR_D0 0x4c +#define HIFMC_DMA_MAX_LEN (4096) +#define HIFMC_DMA_MASK (HIFMC_DMA_MAX_LEN - 1) +#define FMC_OP_DMA 0x68 +#define OP_CTRL_RD_OPCODE(code) (((code) & 0xff) << 16) +#define OP_CTRL_WR_OPCODE(code) (((code) & 0xff) << 8) +#define OP_CTRL_RW_OP(op) ((op) << 1) +#define OP_CTRL_DMA_OP_READY BIT(0) +#define FMC_OP_READ 0x0 +#define FMC_OP_WRITE 0x1 +#define FMC_WAIT_TIMEOUT 1000000 + +enum hifmc_iftype { + IF_TYPE_STD, + IF_TYPE_DUAL, + IF_TYPE_DIO, + IF_TYPE_QUAD, + IF_TYPE_QIO, +}; + +struct hifmc_priv { + u32 chipselect; + u32 clkrate; + struct hifmc_host *host; +}; + +#define HIFMC_MAX_CHIP_NUM 2 +struct hifmc_host { + struct device *dev; + struct mutex lock; + + void __iomem *regbase; + void __iomem *iobase; + struct clk *clk; + void *buffer; + dma_addr_t dma_buffer; + + struct spi_nor *nor[HIFMC_MAX_CHIP_NUM]; + u32 num_chip; +}; + +static inline int hisi_spi_nor_wait_op_finish(struct hifmc_host *host) +{ + u32 reg; + + return readl_poll_timeout(host->regbase + FMC_INT, reg, + (reg & FMC_INT_OP_DONE), 0, FMC_WAIT_TIMEOUT); +} + +static int hisi_spi_nor_get_if_type(enum spi_nor_protocol proto) +{ + enum hifmc_iftype if_type; + + switch (proto) { + case SNOR_PROTO_1_1_2: + if_type = IF_TYPE_DUAL; + break; + case SNOR_PROTO_1_2_2: + if_type = IF_TYPE_DIO; + break; + case SNOR_PROTO_1_1_4: + if_type = IF_TYPE_QUAD; + break; + case SNOR_PROTO_1_4_4: + if_type = IF_TYPE_QIO; + break; + case SNOR_PROTO_1_1_1: + default: + if_type = IF_TYPE_STD; + break; + } + + return if_type; +} + +static void hisi_spi_nor_init(struct hifmc_host *host) +{ + u32 reg; + + reg = TIMING_CFG_TCSH(CS_HOLD_TIME) + | TIMING_CFG_TCSS(CS_SETUP_TIME) + | TIMING_CFG_TSHSL(CS_DESELECT_TIME); + writel(reg, host->regbase + FMC_SPI_TIMING_CFG); +} + +static int hisi_spi_nor_prep(struct spi_nor *nor) +{ + struct hifmc_priv *priv = nor->priv; + struct hifmc_host *host = priv->host; + int ret; + + mutex_lock(&host->lock); + + ret = clk_set_rate(host->clk, priv->clkrate); + if (ret) + goto out; + + ret = clk_prepare_enable(host->clk); + if (ret) + goto out; + + return 0; + +out: + mutex_unlock(&host->lock); + return ret; +} + +static void hisi_spi_nor_unprep(struct spi_nor *nor) +{ + struct hifmc_priv *priv = nor->priv; + struct hifmc_host *host = priv->host; + + clk_disable_unprepare(host->clk); + mutex_unlock(&host->lock); +} + +static int hisi_spi_nor_op_reg(struct spi_nor *nor, + u8 opcode, size_t len, u8 optype) +{ + struct hifmc_priv *priv = nor->priv; + struct hifmc_host *host = priv->host; + u32 reg; + + reg = FMC_CMD_CMD1(opcode); + writel(reg, host->regbase + FMC_CMD); + + reg = FMC_DATA_NUM_CNT(len); + writel(reg, host->regbase + FMC_DATA_NUM); + + reg = OP_CFG_FM_CS(priv->chipselect); + writel(reg, host->regbase + FMC_OP_CFG); + + writel(0xff, host->regbase + FMC_INT_CLR); + reg = FMC_OP_CMD1_EN | FMC_OP_REG_OP_START | optype; + writel(reg, host->regbase + FMC_OP); + + return hisi_spi_nor_wait_op_finish(host); +} + +static int hisi_spi_nor_read_reg(struct spi_nor *nor, u8 opcode, u8 *buf, + size_t len) +{ + struct hifmc_priv *priv = nor->priv; + struct hifmc_host *host = priv->host; + int ret; + + ret = hisi_spi_nor_op_reg(nor, opcode, len, FMC_OP_READ_DATA_EN); + if (ret) + return ret; + + memcpy_fromio(buf, host->iobase, len); + return 0; +} + +static int hisi_spi_nor_write_reg(struct spi_nor *nor, u8 opcode, + const u8 *buf, size_t len) +{ + struct hifmc_priv *priv = nor->priv; + struct hifmc_host *host = priv->host; + + if (len) + memcpy_toio(host->iobase, buf, len); + + return hisi_spi_nor_op_reg(nor, opcode, len, FMC_OP_WRITE_DATA_EN); +} + +static int hisi_spi_nor_dma_transfer(struct spi_nor *nor, loff_t start_off, + dma_addr_t dma_buf, size_t len, u8 op_type) +{ + struct hifmc_priv *priv = nor->priv; + struct hifmc_host *host = priv->host; + u8 if_type = 0; + u32 reg; + + reg = readl(host->regbase + FMC_CFG); + reg &= ~(FMC_CFG_OP_MODE_MASK | SPI_NOR_ADDR_MODE_MASK); + reg |= FMC_CFG_OP_MODE_NORMAL; + reg |= (nor->addr_nbytes == 4) ? SPI_NOR_ADDR_MODE_4BYTES + : SPI_NOR_ADDR_MODE_3BYTES; + writel(reg, host->regbase + FMC_CFG); + + writel(start_off, host->regbase + FMC_ADDRL); + writel(dma_buf, host->regbase + FMC_DMA_SADDR_D0); + writel(FMC_DMA_LEN_SET(len), host->regbase + FMC_DMA_LEN); + + reg = OP_CFG_FM_CS(priv->chipselect); + if (op_type == FMC_OP_READ) + if_type = hisi_spi_nor_get_if_type(nor->read_proto); + else + if_type = hisi_spi_nor_get_if_type(nor->write_proto); + reg |= OP_CFG_MEM_IF_TYPE(if_type); + if (op_type == FMC_OP_READ) + reg |= OP_CFG_DUMMY_NUM(nor->read_dummy >> 3); + writel(reg, host->regbase + FMC_OP_CFG); + + writel(0xff, host->regbase + FMC_INT_CLR); + reg = OP_CTRL_RW_OP(op_type) | OP_CTRL_DMA_OP_READY; + reg |= (op_type == FMC_OP_READ) + ? OP_CTRL_RD_OPCODE(nor->read_opcode) + : OP_CTRL_WR_OPCODE(nor->program_opcode); + writel(reg, host->regbase + FMC_OP_DMA); + + return hisi_spi_nor_wait_op_finish(host); +} + +static ssize_t hisi_spi_nor_read(struct spi_nor *nor, loff_t from, size_t len, + u_char *read_buf) +{ + struct hifmc_priv *priv = nor->priv; + struct hifmc_host *host = priv->host; + size_t offset; + int ret; + + for (offset = 0; offset < len; offset += HIFMC_DMA_MAX_LEN) { + size_t trans = min_t(size_t, HIFMC_DMA_MAX_LEN, len - offset); + + ret = hisi_spi_nor_dma_transfer(nor, + from + offset, host->dma_buffer, trans, FMC_OP_READ); + if (ret) { + dev_warn(nor->dev, "DMA read timeout\n"); + return ret; + } + memcpy(read_buf + offset, host->buffer, trans); + } + + return len; +} + +static ssize_t hisi_spi_nor_write(struct spi_nor *nor, loff_t to, + size_t len, const u_char *write_buf) +{ + struct hifmc_priv *priv = nor->priv; + struct hifmc_host *host = priv->host; + size_t offset; + int ret; + + for (offset = 0; offset < len; offset += HIFMC_DMA_MAX_LEN) { + size_t trans = min_t(size_t, HIFMC_DMA_MAX_LEN, len - offset); + + memcpy(host->buffer, write_buf + offset, trans); + ret = hisi_spi_nor_dma_transfer(nor, + to + offset, host->dma_buffer, trans, FMC_OP_WRITE); + if (ret) { + dev_warn(nor->dev, "DMA write timeout\n"); + return ret; + } + } + + return len; +} + +static const struct spi_nor_controller_ops hisi_controller_ops = { + .prepare = hisi_spi_nor_prep, + .unprepare = hisi_spi_nor_unprep, + .read_reg = hisi_spi_nor_read_reg, + .write_reg = hisi_spi_nor_write_reg, + .read = hisi_spi_nor_read, + .write = hisi_spi_nor_write, +}; + +/* + * Get spi flash device information and register it as a mtd device. + */ +static int hisi_spi_nor_register(struct device_node *np, + struct hifmc_host *host) +{ + const struct spi_nor_hwcaps hwcaps = { + .mask = SNOR_HWCAPS_READ | + SNOR_HWCAPS_READ_FAST | + SNOR_HWCAPS_READ_1_1_2 | + SNOR_HWCAPS_READ_1_1_4 | + SNOR_HWCAPS_PP, + }; + struct device *dev = host->dev; + struct spi_nor *nor; + struct hifmc_priv *priv; + struct mtd_info *mtd; + int ret; + + nor = devm_kzalloc(dev, sizeof(*nor), GFP_KERNEL); + if (!nor) + return -ENOMEM; + + nor->dev = dev; + spi_nor_set_flash_node(nor, np); + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ret = of_property_read_u32(np, "reg", &priv->chipselect); + if (ret) { + dev_err(dev, "There's no reg property for %pOF\n", + np); + return ret; + } + + ret = of_property_read_u32(np, "spi-max-frequency", + &priv->clkrate); + if (ret) { + dev_err(dev, "There's no spi-max-frequency property for %pOF\n", + np); + return ret; + } + priv->host = host; + nor->priv = priv; + nor->controller_ops = &hisi_controller_ops; + + ret = spi_nor_scan(nor, NULL, &hwcaps); + if (ret) + return ret; + + mtd = &nor->mtd; + mtd->name = np->name; + ret = mtd_device_register(mtd, NULL, 0); + if (ret) + return ret; + + host->nor[host->num_chip] = nor; + host->num_chip++; + return 0; +} + +static void hisi_spi_nor_unregister_all(struct hifmc_host *host) +{ + int i; + + for (i = 0; i < host->num_chip; i++) + mtd_device_unregister(&host->nor[i]->mtd); +} + +static int hisi_spi_nor_register_all(struct hifmc_host *host) +{ + struct device *dev = host->dev; + struct device_node *np; + int ret; + + for_each_available_child_of_node(dev->of_node, np) { + ret = hisi_spi_nor_register(np, host); + if (ret) { + of_node_put(np); + goto fail; + } + + if (host->num_chip == HIFMC_MAX_CHIP_NUM) { + dev_warn(dev, "Flash device number exceeds the maximum chipselect number\n"); + of_node_put(np); + break; + } + } + + return 0; + +fail: + hisi_spi_nor_unregister_all(host); + return ret; +} + +static int hisi_spi_nor_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct hifmc_host *host; + int ret; + + host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL); + if (!host) + return -ENOMEM; + + platform_set_drvdata(pdev, host); + host->dev = dev; + + host->regbase = devm_platform_ioremap_resource_byname(pdev, "control"); + if (IS_ERR(host->regbase)) + return PTR_ERR(host->regbase); + + host->iobase = devm_platform_ioremap_resource_byname(pdev, "memory"); + if (IS_ERR(host->iobase)) + return PTR_ERR(host->iobase); + + host->clk = devm_clk_get(dev, NULL); + if (IS_ERR(host->clk)) + return PTR_ERR(host->clk); + + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); + if (ret) { + dev_warn(dev, "Unable to set dma mask\n"); + return ret; + } + + host->buffer = dmam_alloc_coherent(dev, HIFMC_DMA_MAX_LEN, + &host->dma_buffer, GFP_KERNEL); + if (!host->buffer) + return -ENOMEM; + + ret = clk_prepare_enable(host->clk); + if (ret) + return ret; + + mutex_init(&host->lock); + hisi_spi_nor_init(host); + ret = hisi_spi_nor_register_all(host); + if (ret) + mutex_destroy(&host->lock); + + clk_disable_unprepare(host->clk); + return ret; +} + +static int hisi_spi_nor_remove(struct platform_device *pdev) +{ + struct hifmc_host *host = platform_get_drvdata(pdev); + + hisi_spi_nor_unregister_all(host); + mutex_destroy(&host->lock); + return 0; +} + +static const struct of_device_id hisi_spi_nor_dt_ids[] = { + { .compatible = "hisilicon,fmc-spi-nor"}, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, hisi_spi_nor_dt_ids); + +static struct platform_driver hisi_spi_nor_driver = { + .driver = { + .name = "hisi-sfc", + .of_match_table = hisi_spi_nor_dt_ids, + }, + .probe = hisi_spi_nor_probe, + .remove = hisi_spi_nor_remove, +}; +module_platform_driver(hisi_spi_nor_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("HiSilicon SPI Nor Flash Controller Driver"); -- cgit v1.2.3