fl2440 linux内核移植usb驱动

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开发板：fl2440

linux内核：linux-3.0

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1. 添加USB结构体变量，加厂商ID和设备ID

[zoulei@CentOS linux-3.0]$vim arch/arm/mach-s3c2440/mach-smdk2440.c

--- mach1-smdk2440.c    2017-04-15 06:12:36.061000246 -0700+++ mach2-smdk2440.c    2017-04-15 06:21:30.015999978 -0700@@ -13,6 +13,7 @@  * */ +#include <linux/dm9000.h>  #include <linux/kernel.h> #include <linux/types.h> #include <linux/interrupt.h>@@ -22,6 +23,12 @@ #include <linux/serial_core.h> #include <linux/platform_device.h> #include <linux/io.h>+/*  add by zoulei for norflash  */  +#include <linux/gpio_keys.h>  +#include <linux/input.h>  +#include <linux/mtd/physmap.h>  +#include <linux/mtd/mtd.h>  +#include <linux/mtd/partitions.h>  #include <asm/mach/arch.h> #include <asm/mach/map.h>@@ -44,9 +51,45 @@ #include <plat/clock.h> #include <plat/devs.h> #include <plat/cpu.h>-+#include <plat/ts.h>         /*Add by zoulei to support Touch screen, 2017.04.15*/  +#include <mach/regs-clock.h> /*Add by zoulei  2017.04.15, for usb_s3c2440_init() */  +#include <linux/i2c.h>       /*Add by zoulei 2017.4.15, for AT24C512 driver */  +#include <linux/i2c/at24.h>  /*Add by zoulei 2017.4.15, for AT24C512 driver */  +#include <linux/delay.h>   #include <plat/common-smdk.h> +#define DM9000_BASE    (S3C2410_CS4 + 0x300)  +static struct resource s3c_dm9000_resource[] = {  +     [0] = {  +        .start = DM9000_BASE,  +        .end   = DM9000_BASE + 3,  +        .flags = IORESOURCE_MEM  +    },  +    [1] = {  +        .start = DM9000_BASE + 4,  +        .end   = DM9000_BASE + 7,  +        .flags = IORESOURCE_MEM  +    },  +    [2] = {  +        .start = IRQ_EINT7,  +        .end   = IRQ_EINT7,  +        .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,  +    }  +};  ++static struct dm9000_plat_data s3c_dm9000_pdata = {  +    .flags      = (DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM),  +};  +static struct platform_device s3c_device_dm9000 = {  +    .name       = "dm9000",  +    .id     = -1,  +    .num_resources  = ARRAY_SIZE(s3c_dm9000_resource),  +    .resource   = s3c_dm9000_resource,  +    .dev        = {  +        .platform_data  = &s3c_dm9000_pdata,  +    },  +};   + static struct map_desc smdk2440_iodesc[] __initdata = {        /* ISA IO Space map (memory space selected by A24) */ @@ -155,13 +198,30 @@        &s3c_device_wdt,        &s3c_device_i2c0,        &s3c_device_iis,+        &s3c_device_dm9000, }; +/* Add by zoulei 2017.04.15, fix device descriptor read/64, error -62 bug, value refer to datasheet P255 */   +int usb_s3c2440_init(void)  +{  +    /* Input Frequency is 12.0000MHz, and MDEV=0x38 PDIV=2 SDIV=2, so output frequency 48.00MHz */  +    unsigned long upllvalue = (0x38<<12)|(0x02<<4)|(0x02);   +    while (upllvalue != __raw_readl(S3C2410_UPLLCON))  +   {  +        __raw_writel(upllvalue, S3C2410_UPLLCON);   +        mdelay(1);   +    }  +  +    return 0;  +}  ++ static void __init smdk2440_map_io(void) {        s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));-       s3c24xx_init_clocks(16934400);+       s3c24xx_init_clocks(12000000);        s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));+        usb_s3c2440_init(); /* Add by zoulei, 2017.04.15 */ }  static void __init smdk2440_machine_init(void)

[zoulei@CentOS linux-3.0]$ vim drivers/usb/serial/option.c

--- option.c    2017-04-15 06:06:17.470001485 -0700+++ option1.c   2017-04-15 05:47:14.996001503 -0700@@ -50,7 +50,14 @@ static int option_send_setup(struct usb_serial_port *port); static void option_instat_callback(struct urb *urb); -/* Vendor and product IDs */+ /* Vendor and product IDs */  +static int vendor = 0; /*   Add by zoulei */  +static int product = 0; /*   Add by zoulei  */  ++/*   Vendor and product IDs */  +#define OPTION_VENDOR_RESERVED      0xFFFF /*   Add by zoulei */  +#define OPTION_RESERVED_DEVICE      0xFFFF /*   Add by zoulei */   + #define OPTION_VENDOR_ID                       0x0AF0 #define OPTION_PRODUCT_COLT                    0x5000 #define OPTION_PRODUCT_RICOLA                  0x6000@@ -446,7 +453,8 @@        .reason = OPTION_BLACKLIST_SENDSETUP }; -static const struct usb_device_id option_ids[] = {+static  struct usb_device_id option_ids[] = {+        { USB_DEVICE(OPTION_VENDOR_RESERVED, OPTION_RESERVED_DEVICE) },        { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },        { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },        { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_LIGHT) },@@ -1079,6 +1087,15 @@ static int __init option_init(void) {        int retval;+        +         if ((vendor>0) && (product>0))  +           {  +              option_ids[0].match_flags = USB_DEVICE_ID_MATCH_DEVICE;  +              option_ids[0].idVendor = vendor;  +              option_ids[0].idProduct = product;  +              printk("Register option drvier for modem vendor=0x%04x product=0x%04x\n", vendor, product);  +            }  +        retval = usb_serial_register(&option_1port_device);        if (retval)                goto failed_1port_device_register;

2.添加U盘支持

[zoulei@CentOS linux-3.0]$ make menuconfig

Device Drivers --->
Generic Driver Options --->
(/sbin/hotplug) path to uevent helper //配置u盘的热插拔
[*] Block devices --->
<*> Low Performance USB Block driver //低性能USB块设备驱动
SCSI device support --->
<*> SCSI device support //SCSI设备的支持

[*] legacy /proc/scsi/ support

<*> SCSI disk support //是对 USB 鼠标键盘的支持
<*> SCSI generic support //SCSI通用的支持
[*] Probe all LUNs on each SCSI device //所有在每个SCSI LUN探针装置

[*] HID Devices --->

<*> USB Human Interface Device (full HID) support //是对 USB 鼠标键盘的支持

[*] /dev/hiddev raw HID device support

[*] USB support --->
<*> Support for Host-side USB      //主机端USB支持
[*] USB device filesystem (DEPRECATED)  //USB设备文件系统（不推荐使用）
[*] USB device class-devices (DEPRECATED)   / /USB设备类设备（不推荐使用）
<*> USB Monitor    //USB监控
<*> OHCI HCD support//支持OHCI标准
<*> USB Mass Storage support //支持USB海量存储
File systems ---> //配置u盘的文件系统
DOS/FAT/NT Filesystems --->
<*> MSDOS fs support
<*> VFAT (Windows-95) fs support
(437) Default codepage for FAT //默认代码页
(iso8859-1) Default iocharset for FAT //默认字符集
-*- Native language support --->     //配置u盘的语言格式支持

--- Native language support

<*> Codepage 437 (United States, Canada)

<*> Simplified Chinese charset (CP936, GB2312)
<*> ASCII (United States)
<*> NLS UTF-8

3.自动挂载：
[zoulei@centos6 ~]$ cd /home/zoulei/opt/rootfs/etc

[zoulei@centos6 etc]$ vim mdev.conf
sd[a-z][0-9] 0:0 0777 @(mount /dev/$MDEV /mnt/usb)
sd[a-z] 0:0 0777 $(umount /mnt/usb)
#ub[a-z][0-9] 0:0 0777 @(mount /dev/$MDEV /mnt/usb)
#ub[a-z] 0:0 0777 $(umount /mnt/usb)
mmcblk[0-9]p[0-9] 0:0 0777 @(mount /dev/$MDEV /mnt/sdc)
mmcblk[0-9] 0:0 0777 $(umount /mnt/sdc)

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注意：根文件树加了这个配置文件就可以自动挂载了，否则就需要手动挂载：mount /dev/sda /mnt/usb

如果你的U盘在板子上显示是sd，也可能有的设备是ub，这时候进入你的根文件树查看是否自动挂载

sd的设备后置a-z或者0-9都可以显示自动挂载 ub的设备后置从a-z可以显示自动挂载，如果你的ub设备显示数字，可将第三行改为

#ub[a-z][0-9] 0:0 0777 @(mount /dev/$MDEV /mnt/usb)
mmcblk的设备也是如此。

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4.开发板上操作

当插上U盘后开发板上显示:

>: usb 1-1.1: new full speed USB device number 3 using s3c2410-ohci

scsi0 : usb-storage 1-1.1:1.0

scsi 0:0:0:0: Direct-Access UDISK PDU15_1G 71G2.0 0.00 PQ: 0 ANSI: 2

sd 0:0:0:0: [sda] 2015231 512-byte logical blocks: (1.03 GB/983 MiB)

sd 0:0:0:0: Attached scsi generic sg0 type 0

sd 0:0:0:0: [sda] Write Protect is off

sd 0:0:0:0: [sda] Asking for cache data failed

sd 0:0:0:0: [sda] Assuming drive cache: write through

sd 0:0:0:0: [sda] Asking for cache data failed

sd 0:0:0:0: [sda] Assuming drive cache: write through

sda: sda1

sd 0:0:0:0: [sda] Asking for cache data failed

sd 0:0:0:0: [sda] Assuming drive cache: write through

sd 0:0:0:0: [sda] Attached SCSI removable disk

查看挂载到/mnt/usb目录，可以看到里面有我的u盘的内容，说明U盘移植成功了！

不过自己还是有个疑问：自己已经添加了中文支持。可是u盘还是显示不了中文，不知道为什么?

遇到的问题及解决方法:

问题1.

>: usb 1-1.2: new full speed USB device number 3 using s3c2410-ohci

scsi0 : usb-storage 1-1.2:1.0

JFFS2 notice: (769) check_node_data: wrong data CRC in data node at 0x00bc06f8: read 0x45e69e3e, calculated 0x21c8152d.

JFFS2 notice: (769) check_node_data: wrong data CRC in data node at 0x0109c890: read 0x10e5206a, calculated 0x8be51971.

scsi 0:0:0:0: Direct-Access UDISK PDU15_1G 71G2.0 0.00 PQ: 0 ANSI: 2

scsi 0:0:0:0: Attached scsi generic sg0 type 0

>: usb 1-1.2: USB disconnect, device number 3

usb 1-1.1: new full speed USB device number 4 using s3c2410-ohci

scsi1 : usb-storage 1-1.1:1.0

scsi 1:0:0:0: Direct-Access UDISK PDU15_1G 71G2.0 0.00 PQ: 0 ANSI: 2

scsi 1:0:0:0: Attached scsi generic sg0 type 0

解决：插上U盘后开发板上只显示这么少的信息，而且查看我的U盘会有错误显示！

说明有很多内核配置我没选上，于是又再选上支持usb,u盘的选项

问题2：

>: mount /dev/sda1 /mnt/usb/

mount: mounting /dev/sda1 on /mnt/usb/ failed: Device or resource busy

解决：因为内核是自动挂载的，当然这是自己在根文件系统树里面配置的，如果你已经自动挂载，

那么再手动挂载就会显示设备资源忙的提示。

问题3.

>: usb 1-1.1: new full speed USB device number 3 using s3c2410-ohci

scsi0 : usb-storage 1-1.1:1.0

scsi 0:0:0:0: Direct-Access UDISK PDU15_1G 71G2.0 0.00 PQ: 0 ANSI: 2

sd 0:0:0:0: [sda] 2015231 512-byte logical blocks: (1.03 GB/983 MiB)

sd 0:0:0:0: Attached scsi generic sg0 type 0

sd 0:0:0:0: [sda] Write Protect is off

sd 0:0:0:0: [sda] Asking for cache data failed

sd 0:0:0:0: [sda] Assuming drive cache: write through

sd 0:0:0:0: [sda] Asking for cache data failed

sd 0:0:0:0: [sda] Assuming drive cache: write through

sda: sda1

sd 0:0:0:0: [sda] Asking for cache data failed

sd 0:0:0:0: [sda] Assuming drive cache: write through

sd 0:0:0:0: [sda] Attached SCSI removable disk

FAT-fs (sda1): codepage cp437 not found

FAT-fs (sda1): IO charset iso8859-1 not found

解决：内核没有选上Codepage 437，在--- Native language support 里面选上就可以了！

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