[U-Boot] [T-Engine] UBoot configuration for T-Engine/SH7727 MS7727CP02 DevKit

[thaoth <thaoth@cybersoft-vn.com>]

Hi Yoshihiro Shimoda,
* Strategy 1:
I add usb_cpu_init following your tutorial:
int usb_cpu_init(void)
{	
	*STCBR3 = 0x18;
	*SRSTR = 0x18;		
	cpu_wait_ms(50);
	*EXCPGCR = 0x21;//0x28;
	*PECR = 0x1500;
	cpu_wait_ms(50);		
	*SRSTR = 0x00;
	*STCBR3 = 0x00;
	
	return 0;
}
now, I plug the USB2.0(mass storage) into board T-Engine(sh7727) and run
command "usb start", the u-boot can't get decription of usb device with the
errror following:

New Device 1
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0
length 0
x8
set address 2
usb_control_msg: request: 0x5, requesttype: 0x0, value 0x2 index 0x0 length
0x0
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x100 index 0x0
length 0
x12
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0
length 0
x8
usb_control_msg: request: 0x6, requesttype: 0x80, value 0x200 index 0x0
length 0
x20
get_conf_no 0 Result 32, wLength 32
if 0, ep 0
if 0, ep 1
##EP epmaxpacketin[1] = 64
* Strategy 2:
I add usb_cpu_init the same strategy 1, I only add instruction "printf("&ep
= %x\n",&ep);" into function usb_set_maxpacket of usb.c
int usb_set_maxpacket(struct usb_device *dev)
{
.................................................
...................................................
			ep = &dev->config.if_desc[i].ep_desc[ii];
			b=ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;			
			printf("&ep = %x\n",&ep);				
.....................................................
......................................................
}
in this strategy, when I run command "usb start", now I can get information
of USB device:
Manufacturer
Product      USB_DRIVE
SerialNumber 000000000000001000006886
2 USB Device(s) found
       scanning bus for storage devices... usb_control_msg: request: 0xFF,
reque
sttype: 0x21, value 0x0 index 0x0 length 0x0
usb_control_msg: request: 0x1, requesttype: 0x2, value 0x0 index 0x81 length
0x0
usb_control_msg: request: 0x1, requesttype: 0x2, value 0x0 index 0x2 length
0x0
1 Storage Device(s) found

I don't know what is problem?why when I add instruction  "printf("&ep =
%x\n",&ep);", u-boot can get description of USB device
*Strategy 3:
I try replace the insctruction "printf("&ep = %x\n",&ep);" with one of these
instructions
- instruction 1: wait_ms(10)
- instruction 2:void * pointer = &ep;
- instruction 3: "printf("ep = %x\n",ep);"
But the result when run command "usb start" the same strategy 1, I can't get
information of USB2.0(mass storage)


Can you help me to resolve this bug?
Thank you very much for your supports!




Yoshihiro Shimoda wrote:
> 
> Hi, thaoth.
> 
> thaoth wrote:
>> 
>> 0x28: 00101000 -> 00 101 000 -> 
>> * 101: Using bus clock
>> * 000: Dividing Ratio Selection is 1/1
>> 
>> I know 
>> * Internal clock: 96Mhz
>> * Peripheral Clock: 24Mhz
>> * CPU Block: 144Mhz
>> 
>> http://www.nabble.com/file/p19449833/a.JPG a.JPG 
>> 
>> Please let me know the correct value of EXCPGCR ? Is 0x28 correct
>> initialize
>> value of USB clock?
> 
> I think that 0x21 is correct value of EXCPGCR for your board.
> 
> 0x21: 00101000 -> 00 100 001 ->
> * 100: Using Internal Clock
> * 001: Dividing Ratio Selection is 1/2
> (96MHz / 2 = 48MHz)
> 
>>> And I used my board, I set 0x1500 in PKCR.
>> I don't understand PKCR - Port control register so I don't know correct
>> initialize value of this register.
>> 
>> 0x1500 = 0001 0101 0000 0000
>> -> PK6 is port output
>> -> PK5 is port output
>> -> PK4 is port output
>> I don't know this value could be set for my board - TEngine/SH7727.
> 
> Oh, I am very sorry. This is PECR.
> This setting enable USB1_pwr_en and USB2_pwr_en pin.
> 
> Best regards,
> Yoshihiro Shimoda
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
> 
> 

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