移植MT7620A+MT7610E驱动到Openwrt trunk(Linux Kernel 3.14.18)(续：MT7620A)

按照上一篇的内容修改文件重新编译后不会报错，但是烧到flash里后运行的时候有问题，如下：

[   16.840000] mt7620: module license 'unspecified' taints kernel.
[   16.840000] Disabling lock debugging due to kernel taint
[   16.870000] mt7620: Unknown symbol ra_mtd_write_nm (err 0)
[   16.880000] mt7620: Unknown symbol ra_mtd_read_nm (err 0)
[   16.880000] mt7620: Unknown symbol procRegDir (err 0)
[   17.290000] mt7610: Unknown symbol ra_mtd_write_nm (err 0)
[   17.290000] mt7610: Unknown symbol ra_mtd_read_nm (err 0)
[   17.290000] mt7610: Unknown symbol procRegDir (err 0)
[   17.290000] mt7620: Unknown symbol ra_mtd_write_nm (err 0)
[   17.290000] mt7620: Unknown symbol ra_mtd_read_nm (err 0)
[   17.290000] mt7620: Unknown symbol procRegDir (err 0)
[   17.290000] ip_tables: (C) 2000-2006 Netfilter Core Team
[   17.290000] mt7610: Unknown symbol ra_mtd_write_nm (err 0)
[   17.620000] mt7610: Unknown symbol ra_mtd_read_nm (err 0)
[   17.620000] mt7610: Unknown symbol procRegDir (err 0)
[   17.670000] mt7620: Unknown symbol ra_mtd_write_nm (err 0)
[   17.690000] mt7620: Unknown symbol ra_mtd_read_nm (err 0)
[   17.690000] mt7620: Unknown symbol procRegDir (err 0)
[   17.700000] nf_conntrack version 0.5.0 (1979 buckets, 7916 max)
[   17.740000] xt_time: kernel timezone is -0000
[   17.780000] mt7610: Unknown symbol ra_mtd_write_nm (err 0)
[   17.800000] mt7610: Unknown symbol ra_mtd_read_nm (err 0)
[   17.800000] mt7610: Unknown symbol procRegDir (err 0)
[   17.860000] mt7620: Unknown symbol ra_mtd_write_nm (err 0)
[   17.880000] mt7620: Unknown symbol ra_mtd_read_nm (err 0)
[   17.880000] mt7620: Unknown symbol procRegDir (err 0)
[   17.900000] PPP generic driver version 2.4.2
[   17.900000] NET: Registered protocol family 24
[   17.940000] mt7610: Unknown symbol ra_mtd_write_nm (err 0)
[   17.960000] mt7610: Unknown symbol ra_mtd_read_nm (err 0)
[   17.960000] mt7610: Unknown symbol procRegDir (err 0)
[   18.020000] mt7620: Unknown symbol ra_mtd_write_nm (err 0)
[   18.020000] mt7620: Unknown symbol ra_mtd_read_nm (err 0)
[   18.040000] mt7620: Unknown symbol procRegDir (err 0)
[   18.080000] mt7610: Unknown symbol ra_mtd_write_nm (err 0)
[   18.090000] mt7610: Unknown symbol ra_mtd_read_nm (err 0)
[   18.100000] mt7610: Unknown symbol procRegDir (err 0)
[   18.160000] mt7620: Unknown symbol ra_mtd_write_nm (err 0)
[   18.160000] mt7620: Unknown symbol ra_mtd_read_nm (err 0)
[   18.180000] mt7620: Unknown symbol procRegDir (err 0)
[   28.440000] device eth0.1 entered promiscuous mode

解决方法：

移植7620

1. 添加os/linux/rt_flash.c 内容为：

#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/backing-dev.h>
#include <linux/compat.h>
#include <linux/mount.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/concat.h>
#include <linux/mtd/partitions.h>

struct proc_dir_entry *procRegDir;
/*
 * Flash API: ra_mtd_read, ra_mtd_write
 * Arguments:
 *   - num: specific the mtd number
 *   - to/from: the offset to read from or written to
 *   - len: length
 *   - buf: data to be read/written
 * Returns:
 *   - return -errno if failed
 *   - return the number of bytes read/written if successed
 */
int ra_mtd_write_nm(char *name, loff_t to, size_t len, const u_char *buf)
{
    int ret = -1;
    size_t rdlen, wrlen;
    struct mtd_info *mtd;
    struct erase_info ei;
    u_char *bak = NULL;

    mtd = get_mtd_device_nm(name);

    if (IS_ERR(mtd)) {
        ret = (int)mtd;
        goto out;
    }

    if (len > mtd->erasesize) {
        put_mtd_device(mtd);
        ret = -E2BIG;
        goto out;
    }

    bak = kzalloc(mtd->erasesize, GFP_KERNEL);
    if (bak == NULL) {
        put_mtd_device(mtd);
        ret = -ENOMEM;
        goto out;
    }

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)
    ret = mtd_read(mtd, 0, mtd->erasesize, &rdlen, bak);
#else
    ret = mtd->read(mtd, 0, mtd->erasesize, &rdlen, bak);
#endif
    if (ret) {
        goto free_out;
    }

    if (rdlen != mtd->erasesize)
        printk("warning: ra_mtd_write_nm: rdlen is not equal to erasesize
");

    memcpy(bak + to, buf, len);

    ei.mtd = mtd;
    ei.callback = NULL;
    ei.addr = 0;
    ei.len = mtd->erasesize;
    ei.priv = 0;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)
    ret = mtd_erase(mtd, &ei);
#else
    ret = mtd->erase(mtd, &ei);
#endif
    if (ret != 0)
        goto free_out;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)
    ret = mtd_write(mtd, 0, mtd->erasesize, &wrlen, bak);
#else
    ret = mtd->write(mtd, 0, mtd->erasesize, &wrlen, bak);
#endif

    udelay(10); /* add delay after write */

free_out:
    if (mtd)
        put_mtd_device(mtd);

    if (bak)
        kfree(bak);
out:
    return ret;
}

int ra_mtd_read_nm(char *name, loff_t from, size_t len, u_char *buf)
{
    int ret;
    size_t rdlen = 0;
    struct mtd_info *mtd;

    mtd = get_mtd_device_nm(name);
    if (IS_ERR(mtd))
        return (int)mtd;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,3,0)
    ret = mtd_read(mtd, from, len, &rdlen, buf);
#else
    ret = mtd->read(mtd, from, len, &rdlen, buf);
#endif
    if (rdlen != len)
        printk("warning: ra_mtd_read_nm: rdlen is not equal to len
");

    put_mtd_device(mtd);
    return ret;
}

EXPORT_SYMBOL(ra_mtd_write_nm);
EXPORT_SYMBOL(ra_mtd_read_nm);
EXPORT_SYMBOL(procRegDir);

MODULE_AUTHOR("Steven Liu <steven_liu@ralinktech.com.tw>");
MODULE_DESCRIPTION("Ralink APSoC Flash Map");
MODULE_LICENSE("GPL");

2. 修改os/linux/rt_proc.c

将

struct proc_dir_entry *procRegDir

 改为：

struct proc_dir_entry *procRegDir2860v2

并将该文件中所有调用procRegDir 的地方改为： procRegDir2860v2

3. 在Makefile中添加

rt2860v2_ap-objs += ../rt2860v2/os/linux/rt_flash.o

4. 修改 include/chip/rt2880.h
将：

#include <asm/rt2880/rt_mmap.h> 

改为： 

#include "rt_mmap.h" //fix

5. 修改 include/iface/rtmp_rbs.h

将：

#define RTMP_MAC_IRQ_NUM    4

 改为 

#define RTMP_MAC_IRQ_NUM    6

6. 修改 include/video.h

添加 

VOID VideoTurbineDynamicTune(IN PRTMP_ADAPTER pAd);