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/char/nwflash.c | 626 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 626 insertions(+) create mode 100644 drivers/char/nwflash.c (limited to 'drivers/char/nwflash.c') diff --git a/drivers/char/nwflash.c b/drivers/char/nwflash.c new file mode 100644 index 000000000..0973c2c2b --- /dev/null +++ b/drivers/char/nwflash.c @@ -0,0 +1,626 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Flash memory interface rev.5 driver for the Intel + * Flash chips used on the NetWinder. + * + * 20/08/2000 RMK use __ioremap to map flash into virtual memory + * make a few more places use "volatile" + * 22/05/2001 RMK - Lock read against write + * - merge printk level changes (with mods) from Alan Cox. + * - use *ppos as the file position, not file->f_pos. + * - fix check for out of range pos and r/w size + * + * Please note that we are tampering with the only flash chip in the + * machine, which contains the bootup code. We therefore have the + * power to convert these machines into doorstops... + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +/*****************************************************************************/ +#include + +#define NWFLASH_VERSION "6.4" + +static DEFINE_MUTEX(flash_mutex); +static void kick_open(void); +static int get_flash_id(void); +static int erase_block(int nBlock); +static int write_block(unsigned long p, const char __user *buf, int count); + +#define KFLASH_SIZE 1024*1024 //1 Meg +#define KFLASH_SIZE4 4*1024*1024 //4 Meg +#define KFLASH_ID 0x89A6 //Intel flash +#define KFLASH_ID4 0xB0D4 //Intel flash 4Meg + +static bool flashdebug; //if set - we will display progress msgs + +static int gbWriteEnable; +static int gbWriteBase64Enable; +static volatile unsigned char *FLASH_BASE; +static int gbFlashSize = KFLASH_SIZE; +static DEFINE_MUTEX(nwflash_mutex); + +static int get_flash_id(void) +{ + volatile unsigned int c1, c2; + + /* + * try to get flash chip ID + */ + kick_open(); + c2 = inb(0x80); + *(volatile unsigned char *) (FLASH_BASE + 0x8000) = 0x90; + udelay(15); + c1 = *(volatile unsigned char *) FLASH_BASE; + c2 = inb(0x80); + + /* + * on 4 Meg flash the second byte is actually at offset 2... + */ + if (c1 == 0xB0) + c2 = *(volatile unsigned char *) (FLASH_BASE + 2); + else + c2 = *(volatile unsigned char *) (FLASH_BASE + 1); + + c2 += (c1 << 8); + + /* + * set it back to read mode + */ + *(volatile unsigned char *) (FLASH_BASE + 0x8000) = 0xFF; + + if (c2 == KFLASH_ID4) + gbFlashSize = KFLASH_SIZE4; + + return c2; +} + +static long flash_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) +{ + mutex_lock(&flash_mutex); + switch (cmd) { + case CMD_WRITE_DISABLE: + gbWriteBase64Enable = 0; + gbWriteEnable = 0; + break; + + case CMD_WRITE_ENABLE: + gbWriteEnable = 1; + break; + + case CMD_WRITE_BASE64K_ENABLE: + gbWriteBase64Enable = 1; + break; + + default: + gbWriteBase64Enable = 0; + gbWriteEnable = 0; + mutex_unlock(&flash_mutex); + return -EINVAL; + } + mutex_unlock(&flash_mutex); + return 0; +} + +static ssize_t flash_read(struct file *file, char __user *buf, size_t size, + loff_t *ppos) +{ + ssize_t ret; + + if (flashdebug) + printk(KERN_DEBUG "flash_read: flash_read: offset=0x%llx, " + "buffer=%p, count=0x%zx.\n", *ppos, buf, size); + /* + * We now lock against reads and writes. --rmk + */ + if (mutex_lock_interruptible(&nwflash_mutex)) + return -ERESTARTSYS; + + ret = simple_read_from_buffer(buf, size, ppos, (void *)FLASH_BASE, gbFlashSize); + mutex_unlock(&nwflash_mutex); + + return ret; +} + +static ssize_t flash_write(struct file *file, const char __user *buf, + size_t size, loff_t * ppos) +{ + unsigned long p = *ppos; + unsigned int count = size; + int written; + int nBlock, temp, rc; + int i, j; + + if (flashdebug) + printk("flash_write: offset=0x%lX, buffer=0x%p, count=0x%X.\n", + p, buf, count); + + if (!gbWriteEnable) + return -EINVAL; + + if (p < 64 * 1024 && (!gbWriteBase64Enable)) + return -EINVAL; + + /* + * check for out of range pos or count + */ + if (p >= gbFlashSize) + return count ? -ENXIO : 0; + + if (count > gbFlashSize - p) + count = gbFlashSize - p; + + if (!access_ok(buf, count)) + return -EFAULT; + + /* + * We now lock against reads and writes. --rmk + */ + if (mutex_lock_interruptible(&nwflash_mutex)) + return -ERESTARTSYS; + + written = 0; + + nBlock = (int) p >> 16; //block # of 64K bytes + + /* + * # of 64K blocks to erase and write + */ + temp = ((int) (p + count) >> 16) - nBlock + 1; + + /* + * write ends at exactly 64k boundary? + */ + if (((int) (p + count) & 0xFFFF) == 0) + temp -= 1; + + if (flashdebug) + printk(KERN_DEBUG "flash_write: writing %d block(s) " + "starting at %d.\n", temp, nBlock); + + for (; temp; temp--, nBlock++) { + if (flashdebug) + printk(KERN_DEBUG "flash_write: erasing block %d.\n", nBlock); + + /* + * first we have to erase the block(s), where we will write... + */ + i = 0; + j = 0; + RetryBlock: + do { + rc = erase_block(nBlock); + i++; + } while (rc && i < 10); + + if (rc) { + printk(KERN_ERR "flash_write: erase error %x\n", rc); + break; + } + if (flashdebug) + printk(KERN_DEBUG "flash_write: writing offset %lX, " + "from buf %p, bytes left %X.\n", p, buf, + count - written); + + /* + * write_block will limit write to space left in this block + */ + rc = write_block(p, buf, count - written); + j++; + + /* + * if somehow write verify failed? Can't happen?? + */ + if (!rc) { + /* + * retry up to 10 times + */ + if (j < 10) + goto RetryBlock; + else + /* + * else quit with error... + */ + rc = -1; + + } + if (rc < 0) { + printk(KERN_ERR "flash_write: write error %X\n", rc); + break; + } + p += rc; + buf += rc; + written += rc; + *ppos += rc; + + if (flashdebug) + printk(KERN_DEBUG "flash_write: written 0x%X bytes OK.\n", written); + } + + mutex_unlock(&nwflash_mutex); + + return written; +} + + +/* + * The memory devices use the full 32/64 bits of the offset, and so we cannot + * check against negative addresses: they are ok. The return value is weird, + * though, in that case (0). + * + * also note that seeking relative to the "end of file" isn't supported: + * it has no meaning, so it returns -EINVAL. + */ +static loff_t flash_llseek(struct file *file, loff_t offset, int orig) +{ + loff_t ret; + + mutex_lock(&flash_mutex); + if (flashdebug) + printk(KERN_DEBUG "flash_llseek: offset=0x%X, orig=0x%X.\n", + (unsigned int) offset, orig); + + ret = no_seek_end_llseek_size(file, offset, orig, gbFlashSize); + mutex_unlock(&flash_mutex); + return ret; +} + + +/* + * assume that main Write routine did the parameter checking... + * so just go ahead and erase, what requested! + */ + +static int erase_block(int nBlock) +{ + volatile unsigned int c1; + volatile unsigned char *pWritePtr; + unsigned long timeout; + int temp, temp1; + + /* + * reset footbridge to the correct offset 0 (...0..3) + */ + *CSR_ROMWRITEREG = 0; + + /* + * dummy ROM read + */ + c1 = *(volatile unsigned char *) (FLASH_BASE + 0x8000); + + kick_open(); + /* + * reset status if old errors + */ + *(volatile unsigned char *) (FLASH_BASE + 0x8000) = 0x50; + + /* + * erase a block... + * aim at the middle of a current block... + */ + pWritePtr = (unsigned char *) ((unsigned int) (FLASH_BASE + 0x8000 + (nBlock << 16))); + /* + * dummy read + */ + c1 = *pWritePtr; + + kick_open(); + /* + * erase + */ + *(volatile unsigned char *) pWritePtr = 0x20; + + /* + * confirm + */ + *(volatile unsigned char *) pWritePtr = 0xD0; + + /* + * wait 10 ms + */ + msleep(10); + + /* + * wait while erasing in process (up to 10 sec) + */ + timeout = jiffies + 10 * HZ; + c1 = 0; + while (!(c1 & 0x80) && time_before(jiffies, timeout)) { + msleep(10); + /* + * read any address + */ + c1 = *(volatile unsigned char *) (pWritePtr); + // printk("Flash_erase: status=%X.\n",c1); + } + + /* + * set flash for normal read access + */ + kick_open(); +// *(volatile unsigned char*)(FLASH_BASE+0x8000) = 0xFF; + *(volatile unsigned char *) pWritePtr = 0xFF; //back to normal operation + + /* + * check if erase errors were reported + */ + if (c1 & 0x20) { + printk(KERN_ERR "flash_erase: err at %p\n", pWritePtr); + + /* + * reset error + */ + *(volatile unsigned char *) (FLASH_BASE + 0x8000) = 0x50; + return -2; + } + + /* + * just to make sure - verify if erased OK... + */ + msleep(10); + + pWritePtr = (unsigned char *) ((unsigned int) (FLASH_BASE + (nBlock << 16))); + + for (temp = 0; temp < 16 * 1024; temp++, pWritePtr += 4) { + if ((temp1 = *(volatile unsigned int *) pWritePtr) != 0xFFFFFFFF) { + printk(KERN_ERR "flash_erase: verify err at %p = %X\n", + pWritePtr, temp1); + return -1; + } + } + + return 0; + +} + +/* + * write_block will limit number of bytes written to the space in this block + */ +static int write_block(unsigned long p, const char __user *buf, int count) +{ + volatile unsigned int c1; + volatile unsigned int c2; + unsigned char *pWritePtr; + unsigned int uAddress; + unsigned int offset; + unsigned long timeout; + unsigned long timeout1; + + pWritePtr = (unsigned char *) ((unsigned int) (FLASH_BASE + p)); + + /* + * check if write will end in this block.... + */ + offset = p & 0xFFFF; + + if (offset + count > 0x10000) + count = 0x10000 - offset; + + /* + * wait up to 30 sec for this block + */ + timeout = jiffies + 30 * HZ; + + for (offset = 0; offset < count; offset++, pWritePtr++) { + uAddress = (unsigned int) pWritePtr; + uAddress &= 0xFFFFFFFC; + if (__get_user(c2, buf + offset)) + return -EFAULT; + + WriteRetry: + /* + * dummy read + */ + c1 = *(volatile unsigned char *) (FLASH_BASE + 0x8000); + + /* + * kick open the write gate + */ + kick_open(); + + /* + * program footbridge to the correct offset...0..3 + */ + *CSR_ROMWRITEREG = (unsigned int) pWritePtr & 3; + + /* + * write cmd + */ + *(volatile unsigned char *) (uAddress) = 0x40; + + /* + * data to write + */ + *(volatile unsigned char *) (uAddress) = c2; + + /* + * get status + */ + *(volatile unsigned char *) (FLASH_BASE + 0x10000) = 0x70; + + c1 = 0; + + /* + * wait up to 1 sec for this byte + */ + timeout1 = jiffies + 1 * HZ; + + /* + * while not ready... + */ + while (!(c1 & 0x80) && time_before(jiffies, timeout1)) + c1 = *(volatile unsigned char *) (FLASH_BASE + 0x8000); + + /* + * if timeout getting status + */ + if (time_after_eq(jiffies, timeout1)) { + kick_open(); + /* + * reset err + */ + *(volatile unsigned char *) (FLASH_BASE + 0x8000) = 0x50; + + goto WriteRetry; + } + /* + * switch on read access, as a default flash operation mode + */ + kick_open(); + /* + * read access + */ + *(volatile unsigned char *) (FLASH_BASE + 0x8000) = 0xFF; + + /* + * if hardware reports an error writing, and not timeout - + * reset the chip and retry + */ + if (c1 & 0x10) { + kick_open(); + /* + * reset err + */ + *(volatile unsigned char *) (FLASH_BASE + 0x8000) = 0x50; + + /* + * before timeout? + */ + if (time_before(jiffies, timeout)) { + if (flashdebug) + printk(KERN_DEBUG "write_block: Retrying write at 0x%X)n", + pWritePtr - FLASH_BASE); + + /* + * wait couple ms + */ + msleep(10); + + goto WriteRetry; + } else { + printk(KERN_ERR "write_block: timeout at 0x%X\n", + pWritePtr - FLASH_BASE); + /* + * return error -2 + */ + return -2; + + } + } + } + + msleep(10); + + pWritePtr = (unsigned char *) ((unsigned int) (FLASH_BASE + p)); + + for (offset = 0; offset < count; offset++) { + char c, c1; + if (__get_user(c, buf)) + return -EFAULT; + buf++; + if ((c1 = *pWritePtr++) != c) { + printk(KERN_ERR "write_block: verify error at 0x%X (%02X!=%02X)\n", + pWritePtr - FLASH_BASE, c1, c); + return 0; + } + } + + return count; +} + + +static void kick_open(void) +{ + unsigned long flags; + + /* + * we want to write a bit pattern XXX1 to Xilinx to enable + * the write gate, which will be open for about the next 2ms. + */ + raw_spin_lock_irqsave(&nw_gpio_lock, flags); + nw_cpld_modify(CPLD_FLASH_WR_ENABLE, CPLD_FLASH_WR_ENABLE); + raw_spin_unlock_irqrestore(&nw_gpio_lock, flags); + + /* + * let the ISA bus to catch on... + */ + udelay(25); +} + +static const struct file_operations flash_fops = +{ + .owner = THIS_MODULE, + .llseek = flash_llseek, + .read = flash_read, + .write = flash_write, + .unlocked_ioctl = flash_ioctl, +}; + +static struct miscdevice flash_miscdev = +{ + NWFLASH_MINOR, + "nwflash", + &flash_fops +}; + +static int __init nwflash_init(void) +{ + int ret = -ENODEV; + + if (machine_is_netwinder()) { + int id; + + FLASH_BASE = ioremap(DC21285_FLASH, KFLASH_SIZE4); + if (!FLASH_BASE) + goto out; + + id = get_flash_id(); + if ((id != KFLASH_ID) && (id != KFLASH_ID4)) { + ret = -ENXIO; + iounmap((void *)FLASH_BASE); + printk("Flash: incorrect ID 0x%04X.\n", id); + goto out; + } + + printk("Flash ROM driver v.%s, flash device ID 0x%04X, size %d Mb.\n", + NWFLASH_VERSION, id, gbFlashSize / (1024 * 1024)); + + ret = misc_register(&flash_miscdev); + if (ret < 0) { + iounmap((void *)FLASH_BASE); + } + } +out: + return ret; +} + +static void __exit nwflash_exit(void) +{ + misc_deregister(&flash_miscdev); + iounmap((void *)FLASH_BASE); +} + +MODULE_LICENSE("GPL"); + +module_param(flashdebug, bool, 0644); + +module_init(nwflash_init); +module_exit(nwflash_exit); -- cgit v1.2.3