帥哥的測試：
GPH10 控制小 port：0 是打開 1 是關掉
GPH8 控制大 port： 1 是打開 0 是關掉
送電之後就可以用了...他媽的白費兩個禮拜
05/23 :
之前請正哥寄信去要電路圖都不屌我們
COLOR 打電話去就要到了
更正
GPH8 : USB_HOST_EN
GPH10 : nUSB_PULL_UP_EN
USB_HOST_EN 控制 USB_H_5V --> USB HOST PORT 的供電 (大PORT)
nUSB_PULL_UP_EN 控制 USB_C_D+ --> MINI USB 的供電 (小PORT)
掛載usb隨身碟
掛載的時候說找不到codepage：要把kernel重編
-> File systems
-> Native language support (NLS [=y])
把需要用的codepage & charset 加進去
driver message：
usb 1-1: new full speed USB device using s3c2410-ohci and address 3
usb 1-1: configuration #1 chosen from 1 choice
scsi2 : SCSI emulation for USB Mass Storage devices
usb 1-1: Product: USB Mass Storage Device
usb 1-1: Manufacturer: USBest Technology
usb 1-1: SerialNumber: 000000000001CC
scsi 2:0:0:0: Direct-Access UDISK PDU01-4G 81H2.0 0.00 PQ: 2
sd 2:0:0:0: [sdb] 7897087 512-byte hardware sectors (4043 MB)
sd 2:0:0:0: [sdb] Write Protect is off
sd 2:0:0:0: [sdb] Assuming drive cache: write through
sd 2:0:0:0: [sdb] 7897087 512-byte hardware sectors (4043 MB)
sd 2:0:0:0: [sdb] Write Protect is off
sd 2:0:0:0: [sdb] Assuming drive cache: write through
sdb:<7>usb-storage: queuecommand called sdb1
sd 2:0:0:0: [sdb] Attached SCSI removable disk
sd 2:0:0:0: Attached scsi generic sg1 type 0
[busybox] # mkdir /mnt/usb
[busybox] # mount -t auto /dev/sdb1 /mnt/usb
隨身碟可以用了
rt73 USB Driver for Linux
rt73 (USB) CVS hourly tarball: rt73-CVS
解開之後，進去Modules這個資料夾
設定目標kernel位置：
export KERNDIR=/home2/fyodor/kernel/linux-2.6.24.3
他的Makefile會用KERNDIR裡面的CC & CROSS_COMPILE設定
然後簡單make，就編出了rt73.ko
但是有一個warning
!!! WARNING: Module file much too big (>1MB)
!!! Check your kernel settings or use 'strip'
*** Module rt73.ko built successfully
# arm-linux-strip rt73.ko
就變小了
=========================
另一個編譯方式 (2.6.25出來啦！)
make armdebug ARCH=arm \
CROSS_COMPILE=/usr/local/arm/3.4.1/bin/arm-linux- \
KERNDIR=/home2/fyodor/kernel/linux-2.6.25
status code :
s3c2410-ohci s3c2410-ohci: urb c2704ec0 path 1 ep0in 5ec20000 cc 5
--> status -62
all status code : include/asm-generic/errno.h
#define ETIME 62 /* Timer expired */
Document of error codes : Documentation/usb/error-codes.txt
-ETIME (**)
No response packet received within the prescribed bus turn-around time. This error may instead be reported as -EPROTO or -EILSEQ.
利用 simtec-usb driver （discarded）
問題：gpio的設定方式，是否適合2440？
（已解決，看下面）
2440 WinCE bootloader裡面初始化usb的gpio：從GPH10送出0
// Enable USB_PULLUP on GPIO PIN (tied to USB D+) & set high
pIOPregs->GPHCON &= ~(3 << 20); // clear GPH10
pIOPregs->GPHCON |= (1 << 20); // config as output
pIOPregs->GPHUP |= (1 << 10); // pullup disabled
pIOPregs->GPHDAT &= ~(1 << 10); // set Low (Enable)
GPHCON[21:20] = 01 （GPH10=OUTPUT）
GPHUP[10] = 1 （DISABLE PULL UP）
GPHDAT[10] = 0
初始化
參考usb-simtec.c裡的初始化：
int usb_simtec_init(void)
{
printk("USB Power Control, (c) 2004 Simtec Electronics\n");
s3c_device_usb.dev.platform_data = &usb_simtec_info;
s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP);
s3c2410_gpio_setpin(S3C2410_GPB4, 1);
return 0;
}
（simtec用GPB4，在CoAsia2440上不適用！）
然後加在smdk2440里...
[arch/arm/mach-s3c2440/mach-smdk2440.c]
static void __init smdk2440_map_io(void)
{
s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));
s3c24xx_init_clocks(16934400);
s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));
s3c2410_gpio_cfgpin(S3C2410_GPB4, S3C2410_GPB4_OUTP);
s3c2410_gpio_setpin(S3C2410_GPB4, 1);
}
宣告
[arch/arm/plat-s3c24xx/devs.c]
統統加進去
static unsigned int power_state[2];
static void usb_s3c2440_powercontrol(int port, int to)
{
pr_debug("usb_s3c2440_powercontrol(%d,%d)\n", port, to);
power_state[port] = to;
if (power_state[0] && power_state[1])
s3c2410_gpio_setpin(S3C2410_GPB4, 0);
else
s3c2410_gpio_setpin(S3C2410_GPB4, 1);
}
static irqreturn_t usb_s3c2440_ocirq(int irq, void *pw)
{
struct s3c2410_hcd_info *info = (struct s3c2410_hcd_info *)pw;
if (s3c2410_gpio_getpin(S3C2410_GPG10) == 0) {
pr_debug("usb_simtec: over-current irq (oc detected)\n");
s3c2410_usb_report_oc(info, 3);
} else {
pr_debug("usb_simtec: over-current irq (oc cleared)\n");
s3c2410_usb_report_oc(info, 0);
}
return IRQ_HANDLED;
}
static void usb_s3c24440_enableoc(struct s3c2410_hcd_info *info, int on)
{
int ret;
if (on) {
ret = request_irq(IRQ_USBOC, usb_s3c2440_ocirq,
IRQF_DISABLED | IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING,
"USB Over-current", info);
if (ret != 0) {
printk(KERN_ERR "failed to request usb oc irq\n");
}
} else {
free_irq(IRQ_USBOC, info);
}
}
static struct s3c2410_hcd_info usb_smdk2440_info = {
.port[0] = {
.flags = S3C_HCDFLG_USED
},
.port[1] = {
.flags = S3C_HCDFLG_USED
},
.power_control = usb_s3c2440_powercontrol,
.enable_oc = usb_s3c24440_enableoc,
};
EXPORT_SYMBOL(usb_smdk2440_info);
資料結構：
[include/asm-arm/arch-s3c2410/usb-control.h]
struct s3c2410_hcd_info {
struct usb_hcd *hcd;
struct s3c2410_hcd_port port[2];
void (*power_control)(int port, int to);
void (*enable_oc)(struct s3c2410_hcd_info *, int on);
void (*report_oc)(struct s3c2410_hcd_info *, int ports);
};
struct s3c2410_hcd_port {
unsigned char flags;
unsigned char power;
unsigned char oc_status;
unsigned char oc_changed;
};
ohci-s3c2410需要設定gpio
確定解決方法了，帥哥很暴力
在vivi裡面寫了一個程式去try gpio
終於找到控制usb host送電的gpio
(在這兒 s3c2440 USB Storage )
帥哥跟小黑的作法是套用simtec的driver
但是simtec的driver裡面還有over-current的保護機制
因為不確定CoAsia2440的電路是拉哪個gpio去控制usb oc
所以我決定不用simtec的driver
只簡單的在ohci-s3c2410.c的probe & remove裡面控制送電
static int usb_hcd_s3c2410_probe
printk("usb : set power gpio for USB\n");
s3c2410_gpio_cfgpin(S3C2410_GPH10, S3C2410_GPH10_OUTP);
s3c2410_gpio_pullup(S3C2410_GPH10, 0);
s3c2410_gpio_setpin(S3C2410_GPH10, 0);
s3c2410_gpio_cfgpin(S3C2410_GPH8, S3C2410_GPH8_OUTP);
s3c2410_gpio_pullup(S3C2410_GPH8, 1);
s3c2410_gpio_setpin(S3C2410_GPH8, 1);
static void usb_hcd_s3c2410_remove
printk("usb : shutdown power gpio for USB\n");
s3c2410_gpio_cfgpin(S3C2410_GPH10, S3C2410_GPH10_OUTP);
s3c2410_gpio_pullup(S3C2410_GPH10, 1);
s3c2410_gpio_setpin(S3C2410_GPH10, 1);
s3c2410_gpio_cfgpin(S3C2410_GPH8, S3C2410_GPH8_OUTP);
s3c2410_gpio_pullup(S3C2410_GPH8, 0);
s3c2410_gpio_setpin(S3C2410_GPH8, 0);
下面是之前測試的方式，僅當作紀錄
============================================
[include/asm-arm/plat-s3c24xx/devs.h]
extern struct platform_device *s3c24xx_uart_devs[];
extern struct platform_device *s3c24xx_uart_src[];
extern struct s3c2410_hcd_info usb_smdk2440_info;
extern struct platform_device s3c_device_usb;
--
[arch/arm/plat-s3c24xx/devs.c]
/* USB Host Controller */
static struct s3c2410_hcd_info usb_smdk2440_info = {
.port[0] = {
.flags = S3C_HCDFLG_USED
},
.port[1] = {
.flags = S3C_HCDFLG_USED
},
};
EXPORT_SYMBOL(usb_smdk2440_info);
static struct resource s3c_usb_resource[] = {
.
.
.
struct platform_device s3c_device_usb = {
.name = "s3c2410-ohci",
.id = -1,
.num_resources = ARRAY_SIZE(s3c_usb_resource),
.resource = s3c_usb_resource,
.dev = {
.dma_mask = &s3c_device_usb_dmamask,
.coherent_dma_mask = 0xffffffffUL,
.platform_data = &usb_smdk2440_info
}
};
EXPORT_SYMBOL(s3c_device_usb);
--
終於make過了
幹～星期一去學校再弄
/proc/bus/usb is empty
kernel_src/Documentation/usb/proc_usb_info.txt
**NOTE**: If /proc/bus/usb appears empty, and a host controller
driver has been linked, then you need to mount the filesystem.
/etc/fstab 增加一行：
none /proc/bus/usb usbfs defaults 0 0
/proc/bus/usb/devices：USB device information
debugfs & usbmon
# mount -t debugfs none_debugs /sys/kernel/debug
如果usbmon有load起來或是compile-in，/sys/kernel/debug裡面就會有一個usbmon
裡面大概長這樣：
# ls /sys/kernel/debug/usbmon/
0s 0u 1s 1t 1u
數字代表bus number，0 則是所有bus的資訊
所以現在要查看usb bus number：
# cat /proc/bus/usb/devices
注意T開頭那一行
T: Bus=01 .......
所以usb在bus #1
或是乾脆listen all buses...
# cat /sys/kernel/debug/usbmon/0u > /tmp/all.usbmon.out
mdev in busybox
mdev是busybox裡用來取代udev的device 管理架構，節省資源且設定簡單
busybox mdev document：
Mdev has two primary uses: initial population and dynamic updates.
Both require sysfs support in the kernel and have it mounted at /sys.
For dynamic updates, you also need to have hotplugging enabled in your kernel.
官方建議的mdev 初始化方式
Here's a typical code snippet from the init script:
[1] mount -t sysfs sysfs /sys
[2] echo /bin/mdev > /proc/sys/kernel/hotplug
[3] mdev -s
Of course, a more "full" setup would entail executing this before the previous
code snippet:
[4] mount -t tmpfs mdev /dev
[5] mkdir /dev/pts
[6] mount -t devpts devpts /dev/pts
初始設定的說明
[1] 執行mdev 之前務必要先掛載/sys
[2] 告訴kernel 把hotplug 交給mdev 去處理
[3] mdev 藉由掃瞄 /sys/class、/sys/block 來找到device, 然後在/dev 下建立device 節點
2[4-6] 不重要
# cat /etc/fstab
proc /proc proc defaults 0 0
none /tmp ramfs defaults 0 0
mdev /dev ramfs defaults 0 0
sysfs /sys sysfs defaults 0 0
none /proc/bus/usb usbfs defaults 0 0
Wireless USB Adapter
我拿到的無線網路USB是ASUS的WL167G
裡面用的chip是Ralink的rt73（就是我們台灣的雷凌科技啦）
廠商就提供linux driver囉～ kernel版本2.4, 2.6都有
（剛才發現kernel裡面也有提供module）
測試過在桌機linux上運作正常
現在要port到板子上
參考資料
gmane.linux.usb.general：專門討論Linux USB Driver開發的 Mailing List
Linux Hotplugging
Linux USB
Busybox mdev document
Linux設備驅動程序學習（15）- Linux設備模型（熱插拔、mdev 與 firmware）
Linux那些事兒 之 我是Sysfs
0 comments:
Post a Comment