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/nand/raw/bcm47xxnflash/ops_bcm4706.c | 451 +++++++++++++++++++++++ 1 file changed, 451 insertions(+) create mode 100644 drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c (limited to 'drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c') diff --git a/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c b/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c new file mode 100644 index 000000000..6487dfc64 --- /dev/null +++ b/drivers/mtd/nand/raw/bcm47xxnflash/ops_bcm4706.c @@ -0,0 +1,451 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * BCM47XX NAND flash driver + * + * Copyright (C) 2012 Rafał Miłecki + */ + +#include "bcm47xxnflash.h" + +#include +#include +#include +#include +#include + +/* Broadcom uses 1'000'000 but it seems to be too many. Tests on WNDR4500 has + * shown ~1000 retries as maximum. */ +#define NFLASH_READY_RETRIES 10000 + +#define NFLASH_SECTOR_SIZE 512 + +#define NCTL_CMD0 0x00010000 +#define NCTL_COL 0x00020000 /* Update column with value from BCMA_CC_NFLASH_COL_ADDR */ +#define NCTL_ROW 0x00040000 /* Update row (page) with value from BCMA_CC_NFLASH_ROW_ADDR */ +#define NCTL_CMD1W 0x00080000 +#define NCTL_READ 0x00100000 +#define NCTL_WRITE 0x00200000 +#define NCTL_SPECADDR 0x01000000 +#define NCTL_READY 0x04000000 +#define NCTL_ERR 0x08000000 +#define NCTL_CSA 0x40000000 +#define NCTL_START 0x80000000 + +/************************************************** + * Various helpers + **************************************************/ + +static inline u8 bcm47xxnflash_ops_bcm4706_ns_to_cycle(u16 ns, u16 clock) +{ + return ((ns * 1000 * clock) / 1000000) + 1; +} + +static int bcm47xxnflash_ops_bcm4706_ctl_cmd(struct bcma_drv_cc *cc, u32 code) +{ + int i = 0; + + bcma_cc_write32(cc, BCMA_CC_NFLASH_CTL, NCTL_START | code); + for (i = 0; i < NFLASH_READY_RETRIES; i++) { + if (!(bcma_cc_read32(cc, BCMA_CC_NFLASH_CTL) & NCTL_START)) { + i = 0; + break; + } + } + if (i) { + pr_err("NFLASH control command not ready!\n"); + return -EBUSY; + } + return 0; +} + +static int bcm47xxnflash_ops_bcm4706_poll(struct bcma_drv_cc *cc) +{ + int i; + + for (i = 0; i < NFLASH_READY_RETRIES; i++) { + if (bcma_cc_read32(cc, BCMA_CC_NFLASH_CTL) & NCTL_READY) { + if (bcma_cc_read32(cc, BCMA_CC_NFLASH_CTL) & + BCMA_CC_NFLASH_CTL_ERR) { + pr_err("Error on polling\n"); + return -EBUSY; + } else { + return 0; + } + } + } + + pr_err("Polling timeout!\n"); + return -EBUSY; +} + +/************************************************** + * R/W + **************************************************/ + +static void bcm47xxnflash_ops_bcm4706_read(struct mtd_info *mtd, uint8_t *buf, + int len) +{ + struct nand_chip *nand_chip = mtd_to_nand(mtd); + struct bcm47xxnflash *b47n = nand_get_controller_data(nand_chip); + + u32 ctlcode; + u32 *dest = (u32 *)buf; + int i; + int toread; + + BUG_ON(b47n->curr_page_addr & ~nand_chip->pagemask); + /* Don't validate column using nand_chip->page_shift, it may be bigger + * when accessing OOB */ + + while (len) { + /* We can read maximum of 0x200 bytes at once */ + toread = min(len, 0x200); + + /* Set page and column */ + bcma_cc_write32(b47n->cc, BCMA_CC_NFLASH_COL_ADDR, + b47n->curr_column); + bcma_cc_write32(b47n->cc, BCMA_CC_NFLASH_ROW_ADDR, + b47n->curr_page_addr); + + /* Prepare to read */ + ctlcode = NCTL_CSA | NCTL_CMD1W | NCTL_ROW | NCTL_COL | + NCTL_CMD0; + ctlcode |= NAND_CMD_READSTART << 8; + if (bcm47xxnflash_ops_bcm4706_ctl_cmd(b47n->cc, ctlcode)) + return; + if (bcm47xxnflash_ops_bcm4706_poll(b47n->cc)) + return; + + /* Eventually read some data :) */ + for (i = 0; i < toread; i += 4, dest++) { + ctlcode = NCTL_CSA | 0x30000000 | NCTL_READ; + if (i == toread - 4) /* Last read goes without that */ + ctlcode &= ~NCTL_CSA; + if (bcm47xxnflash_ops_bcm4706_ctl_cmd(b47n->cc, + ctlcode)) + return; + *dest = bcma_cc_read32(b47n->cc, BCMA_CC_NFLASH_DATA); + } + + b47n->curr_column += toread; + len -= toread; + } +} + +static void bcm47xxnflash_ops_bcm4706_write(struct mtd_info *mtd, + const uint8_t *buf, int len) +{ + struct nand_chip *nand_chip = mtd_to_nand(mtd); + struct bcm47xxnflash *b47n = nand_get_controller_data(nand_chip); + struct bcma_drv_cc *cc = b47n->cc; + + u32 ctlcode; + const u32 *data = (u32 *)buf; + int i; + + BUG_ON(b47n->curr_page_addr & ~nand_chip->pagemask); + /* Don't validate column using nand_chip->page_shift, it may be bigger + * when accessing OOB */ + + for (i = 0; i < len; i += 4, data++) { + bcma_cc_write32(cc, BCMA_CC_NFLASH_DATA, *data); + + ctlcode = NCTL_CSA | 0x30000000 | NCTL_WRITE; + if (i == len - 4) /* Last read goes without that */ + ctlcode &= ~NCTL_CSA; + if (bcm47xxnflash_ops_bcm4706_ctl_cmd(cc, ctlcode)) { + pr_err("%s ctl_cmd didn't work!\n", __func__); + return; + } + } + + b47n->curr_column += len; +} + +/************************************************** + * NAND chip ops + **************************************************/ + +static void bcm47xxnflash_ops_bcm4706_cmd_ctrl(struct nand_chip *nand_chip, + int cmd, unsigned int ctrl) +{ + struct bcm47xxnflash *b47n = nand_get_controller_data(nand_chip); + u32 code = 0; + + if (cmd == NAND_CMD_NONE) + return; + + if (cmd & NAND_CTRL_CLE) + code = cmd | NCTL_CMD0; + + /* nCS is not needed for reset command */ + if (cmd != NAND_CMD_RESET) + code |= NCTL_CSA; + + bcm47xxnflash_ops_bcm4706_ctl_cmd(b47n->cc, code); +} + +/* Default nand_select_chip calls cmd_ctrl, which is not used in BCM4706 */ +static void bcm47xxnflash_ops_bcm4706_select_chip(struct nand_chip *chip, + int cs) +{ + return; +} + +static int bcm47xxnflash_ops_bcm4706_dev_ready(struct nand_chip *nand_chip) +{ + struct bcm47xxnflash *b47n = nand_get_controller_data(nand_chip); + + return !!(bcma_cc_read32(b47n->cc, BCMA_CC_NFLASH_CTL) & NCTL_READY); +} + +/* + * Default nand_command and nand_command_lp don't match BCM4706 hardware layout. + * For example, reading chip id is performed in a non-standard way. + * Setting column and page is also handled differently, we use a special + * registers of ChipCommon core. Hacking cmd_ctrl to understand and convert + * standard commands would be much more complicated. + */ +static void bcm47xxnflash_ops_bcm4706_cmdfunc(struct nand_chip *nand_chip, + unsigned command, int column, + int page_addr) +{ + struct mtd_info *mtd = nand_to_mtd(nand_chip); + struct bcm47xxnflash *b47n = nand_get_controller_data(nand_chip); + struct bcma_drv_cc *cc = b47n->cc; + u32 ctlcode; + int i; + + if (column != -1) + b47n->curr_column = column; + if (page_addr != -1) + b47n->curr_page_addr = page_addr; + + switch (command) { + case NAND_CMD_RESET: + nand_chip->legacy.cmd_ctrl(nand_chip, command, NAND_CTRL_CLE); + + ndelay(100); + nand_wait_ready(nand_chip); + break; + case NAND_CMD_READID: + ctlcode = NCTL_CSA | 0x01000000 | NCTL_CMD1W | NCTL_CMD0; + ctlcode |= NAND_CMD_READID; + if (bcm47xxnflash_ops_bcm4706_ctl_cmd(b47n->cc, ctlcode)) { + pr_err("READID error\n"); + break; + } + + /* + * Reading is specific, last one has to go without NCTL_CSA + * bit. We don't know how many reads NAND subsystem is going + * to perform, so cache everything. + */ + for (i = 0; i < ARRAY_SIZE(b47n->id_data); i++) { + ctlcode = NCTL_CSA | NCTL_READ; + if (i == ARRAY_SIZE(b47n->id_data) - 1) + ctlcode &= ~NCTL_CSA; + if (bcm47xxnflash_ops_bcm4706_ctl_cmd(b47n->cc, + ctlcode)) { + pr_err("READID error\n"); + break; + } + b47n->id_data[i] = + bcma_cc_read32(b47n->cc, BCMA_CC_NFLASH_DATA) + & 0xFF; + } + + break; + case NAND_CMD_STATUS: + ctlcode = NCTL_CSA | NCTL_CMD0 | NAND_CMD_STATUS; + if (bcm47xxnflash_ops_bcm4706_ctl_cmd(cc, ctlcode)) + pr_err("STATUS command error\n"); + break; + case NAND_CMD_READ0: + break; + case NAND_CMD_READOOB: + if (page_addr != -1) + b47n->curr_column += mtd->writesize; + break; + case NAND_CMD_ERASE1: + bcma_cc_write32(cc, BCMA_CC_NFLASH_ROW_ADDR, + b47n->curr_page_addr); + ctlcode = NCTL_ROW | NCTL_CMD1W | NCTL_CMD0 | + NAND_CMD_ERASE1 | (NAND_CMD_ERASE2 << 8); + if (bcm47xxnflash_ops_bcm4706_ctl_cmd(cc, ctlcode)) + pr_err("ERASE1 failed\n"); + break; + case NAND_CMD_ERASE2: + break; + case NAND_CMD_SEQIN: + /* Set page and column */ + bcma_cc_write32(cc, BCMA_CC_NFLASH_COL_ADDR, + b47n->curr_column); + bcma_cc_write32(cc, BCMA_CC_NFLASH_ROW_ADDR, + b47n->curr_page_addr); + + /* Prepare to write */ + ctlcode = 0x40000000 | NCTL_ROW | NCTL_COL | NCTL_CMD0; + ctlcode |= NAND_CMD_SEQIN; + if (bcm47xxnflash_ops_bcm4706_ctl_cmd(cc, ctlcode)) + pr_err("SEQIN failed\n"); + break; + case NAND_CMD_PAGEPROG: + if (bcm47xxnflash_ops_bcm4706_ctl_cmd(cc, NCTL_CMD0 | + NAND_CMD_PAGEPROG)) + pr_err("PAGEPROG failed\n"); + if (bcm47xxnflash_ops_bcm4706_poll(cc)) + pr_err("PAGEPROG not ready\n"); + break; + default: + pr_err("Command 0x%X unsupported\n", command); + break; + } + b47n->curr_command = command; +} + +static u8 bcm47xxnflash_ops_bcm4706_read_byte(struct nand_chip *nand_chip) +{ + struct mtd_info *mtd = nand_to_mtd(nand_chip); + struct bcm47xxnflash *b47n = nand_get_controller_data(nand_chip); + struct bcma_drv_cc *cc = b47n->cc; + u32 tmp = 0; + + switch (b47n->curr_command) { + case NAND_CMD_READID: + if (b47n->curr_column >= ARRAY_SIZE(b47n->id_data)) { + pr_err("Requested invalid id_data: %d\n", + b47n->curr_column); + return 0; + } + return b47n->id_data[b47n->curr_column++]; + case NAND_CMD_STATUS: + if (bcm47xxnflash_ops_bcm4706_ctl_cmd(cc, NCTL_READ)) + return 0; + return bcma_cc_read32(cc, BCMA_CC_NFLASH_DATA) & 0xff; + case NAND_CMD_READOOB: + bcm47xxnflash_ops_bcm4706_read(mtd, (u8 *)&tmp, 4); + return tmp & 0xFF; + } + + pr_err("Invalid command for byte read: 0x%X\n", b47n->curr_command); + return 0; +} + +static void bcm47xxnflash_ops_bcm4706_read_buf(struct nand_chip *nand_chip, + uint8_t *buf, int len) +{ + struct bcm47xxnflash *b47n = nand_get_controller_data(nand_chip); + + switch (b47n->curr_command) { + case NAND_CMD_READ0: + case NAND_CMD_READOOB: + bcm47xxnflash_ops_bcm4706_read(nand_to_mtd(nand_chip), buf, + len); + return; + } + + pr_err("Invalid command for buf read: 0x%X\n", b47n->curr_command); +} + +static void bcm47xxnflash_ops_bcm4706_write_buf(struct nand_chip *nand_chip, + const uint8_t *buf, int len) +{ + struct bcm47xxnflash *b47n = nand_get_controller_data(nand_chip); + + switch (b47n->curr_command) { + case NAND_CMD_SEQIN: + bcm47xxnflash_ops_bcm4706_write(nand_to_mtd(nand_chip), buf, + len); + return; + } + + pr_err("Invalid command for buf write: 0x%X\n", b47n->curr_command); +} + +/************************************************** + * Init + **************************************************/ + +int bcm47xxnflash_ops_bcm4706_init(struct bcm47xxnflash *b47n) +{ + struct nand_chip *nand_chip = (struct nand_chip *)&b47n->nand_chip; + int err; + u32 freq; + u16 clock; + u8 w0, w1, w2, w3, w4; + + unsigned long chipsize; /* MiB */ + u8 tbits, col_bits, col_size, row_bits, row_bsize; + u32 val; + + nand_chip->legacy.select_chip = bcm47xxnflash_ops_bcm4706_select_chip; + nand_chip->legacy.cmd_ctrl = bcm47xxnflash_ops_bcm4706_cmd_ctrl; + nand_chip->legacy.dev_ready = bcm47xxnflash_ops_bcm4706_dev_ready; + b47n->nand_chip.legacy.cmdfunc = bcm47xxnflash_ops_bcm4706_cmdfunc; + b47n->nand_chip.legacy.read_byte = bcm47xxnflash_ops_bcm4706_read_byte; + b47n->nand_chip.legacy.read_buf = bcm47xxnflash_ops_bcm4706_read_buf; + b47n->nand_chip.legacy.write_buf = bcm47xxnflash_ops_bcm4706_write_buf; + b47n->nand_chip.legacy.set_features = nand_get_set_features_notsupp; + b47n->nand_chip.legacy.get_features = nand_get_set_features_notsupp; + + nand_chip->legacy.chip_delay = 50; + b47n->nand_chip.bbt_options = NAND_BBT_USE_FLASH; + /* TODO: implement ECC */ + b47n->nand_chip.ecc.engine_type = NAND_ECC_ENGINE_TYPE_NONE; + + /* Enable NAND flash access */ + bcma_cc_set32(b47n->cc, BCMA_CC_4706_FLASHSCFG, + BCMA_CC_4706_FLASHSCFG_NF1); + + /* Configure wait counters */ + if (b47n->cc->status & BCMA_CC_CHIPST_4706_PKG_OPTION) { + /* 400 MHz */ + freq = 400000000 / 4; + } else { + freq = bcma_chipco_pll_read(b47n->cc, 4); + freq = (freq & 0xFFF) >> 3; + /* Fixed reference clock 25 MHz and m = 2 */ + freq = (freq * 25000000 / 2) / 4; + } + clock = freq / 1000000; + w0 = bcm47xxnflash_ops_bcm4706_ns_to_cycle(15, clock); + w1 = bcm47xxnflash_ops_bcm4706_ns_to_cycle(20, clock); + w2 = bcm47xxnflash_ops_bcm4706_ns_to_cycle(10, clock); + w3 = bcm47xxnflash_ops_bcm4706_ns_to_cycle(10, clock); + w4 = bcm47xxnflash_ops_bcm4706_ns_to_cycle(100, clock); + bcma_cc_write32(b47n->cc, BCMA_CC_NFLASH_WAITCNT0, + (w4 << 24 | w3 << 18 | w2 << 12 | w1 << 6 | w0)); + + /* Scan NAND */ + err = nand_scan(&b47n->nand_chip, 1); + if (err) { + pr_err("Could not scan NAND flash: %d\n", err); + goto exit; + } + + /* Configure FLASH */ + chipsize = nanddev_target_size(&b47n->nand_chip.base) >> 20; + tbits = ffs(chipsize); /* find first bit set */ + if (!tbits || tbits != fls(chipsize)) { + pr_err("Invalid flash size: 0x%lX\n", chipsize); + err = -ENOTSUPP; + goto exit; + } + tbits += 19; /* Broadcom increases *index* by 20, we increase *pos* */ + + col_bits = b47n->nand_chip.page_shift + 1; + col_size = (col_bits + 7) / 8; + + row_bits = tbits - col_bits + 1; + row_bsize = (row_bits + 7) / 8; + + val = ((row_bsize - 1) << 6) | ((col_size - 1) << 4) | 2; + bcma_cc_write32(b47n->cc, BCMA_CC_NFLASH_CONF, val); + +exit: + if (err) + bcma_cc_mask32(b47n->cc, BCMA_CC_4706_FLASHSCFG, + ~BCMA_CC_4706_FLASHSCFG_NF1); + return err; +} -- cgit v1.2.3