fl2440内核移植（五）——USB驱动移植

来源：互联网发布：学java前要学什么编辑：程序博客网时间：2024/05/15 05:38

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系统环境：Centos 6.5

板子芯片：s3c2440

内核版本：linux 3.0

编译器：arm-linux-gcc 4.5.4

作者：Lu Zengmeng <1540999272@qq.com>

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1、修改drivers/usb/serial/Kconfig

找到config USB_SERIAL_WWAN

将下一行的tristate删除，并添加以下两行

boolean

default y if USB_SERIAL_OPTION

2、修改drivers/usb/serial/option.c

添加以下代码

static int vendor = 0;

static int product = 0;

#define OPTION_VENDOR_RESERVED 0XFFFF

#define OPTION_RESERVED_DEVICE 0XFFFF

将static const struct usb_device_id option_ids[]

改为static struct usb_device_id option_ids[]

并在该结构体中添加下面一行

{ USB_DEVICE(OPTION_VENDOR_RESERVED, OPTION_RESERVED_DEVICE) },

找到static int __init option_init(void)

在该函数中int retval;的下一行添加以下几行

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);
}

找到MODULE_AUTHOR(DRIVER_AUTHOR);

在这行上面添加以下代码

module_param(vendor, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(vendor, "User specified vendor ID");
module_param(product, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(product, "User specified product ID");

3、修改arch/arm/mach-s3c2440/mach-smdk2440.c

添加头文件

#include <mach/regs-clock.h>

#include <linux/delay.h>

添加函数

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;
}

找到smdk2440_map_io(void)

在该函数中添加下面一行

usb_s3c2440_init();

4、修改drivers/usb/host/ohci-s3c2410.c

添加头文件

#include <mach/regs-clock.h>

找到struct s3c2410_hcd_info *info = dev->dev.platform_data;

在该行下面加入

unsigned long upllvalue = (0x38<<12)|(0x02<<4)|(0x02);
while (upllvalue != __raw_readl(S3C2410_UPLLCON))
{
__raw_writel(upllvalue, S3C2410_UPLLCON);
mdelay(1);
}
__raw_writel(upllvalue, S3C2410_UPLLCON);

5、配置menuconfig

Device Drivers --->

Generic Driver Options --->

(/sbin/hotplug) path to uevent helper

[*] Block devices --->

<*> Low Performance USB Block driver

SCSI device support --->

<*> SCSI device support

<*> SCSI generic support

[*] Probe all LUNs on each SCSI device

[*] USB support --->
{*} Support for Host-side USB
[*] USB device filesystem (DEPRECATED)
[*] USB device class-devices (DEPRECATED)
<*> OHCI HCD support
<*> USB Mass Storage support

[*] HID Devices --->
-*- Generic HID support
<*> USB Human Interface Device (full HID) support

SCSI device support --->
<*> SCSI device support
[*] legacy /proc/scsi/ support
<*> SCSI disk support

File systems --->
DOS/FAT/NT Filesystems --->
<*> MSDOS fs support
<*> VFAT (Windows-95) fs support
(437) Default codepage for FAT
(iso8859-1) Default iocharset for FAT
<*> NTFS file system support
[*] NTFS write support
Partition Types --->
[*] PC BIOS (MSDOS partition tables) support
[*] Windows Logical Disk Manager (Dynamic Disk) support
-*- Native language support --->
<*> Codepage 437 (United States, Canada)
<*> Simplified Chinese charset (CP936, GB2312)
<*> ASCII (United States)
<*> NLS ISO 8859-1 (Latin 1; Western European Languages)
<*> NLS UTF-8

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