Problem with USB OTG

[hitom]

On my Sabre-SD (with imx6q) USB OTG is working well, on a customized board with imx6dl usb otg is not working (all other things including usbh1 are working well)!

My configs:

     #define MX6DL_ICORE_USB_OTG_PWR IMX_GPIO_NR(4, 15)

     MX6DL_PAD_KEY_ROW4__GPIO_4_15,

     MX6DL_PAD_KEY_COL4__USBOH3_USBOTG_OC,

     MX6DL_PAD_GPIO_1__USBOTG_ID,

//USB OTG-----------------------------------------------------------------------

static void imx6q_icore_usbotg_vbus(bool on)

{

  if(on)gpio_set_value(MX6DL_ICORE_USB_OTG_PWR,1);

  else gpio_set_value(MX6DL_ICORE_USB_OTG_PWR,0);

}

static void __init imx6q_icore_init_usb(void)

{

  int ret=0;

  imx_otg_base=MX6_IO_ADDRESS(MX6Q_USB_OTG_BASE_ADDR);

  ret=gpio_request(MX6DL_ICORE_USB_OTG_PWR,"usb-pwr");

  if(ret){

  pr_err("failed to get GPIO MX6DL_ICORE_USB_OTG_PWR: %d\n",ret);

  return;

  }

  gpio_direction_output(MX6DL_ICORE_USB_OTG_PWR,0);

  //mxc_iomux_set_gpr_register(1,13,1,1);

  mx6_set_otghost_vbus_func(imx6q_icore_usbotg_vbus);

}

imx6q_icore_init_usb();

Has anybody an idea?

Thanks in advance, tom

[YixingKong]

Thomas

This discussion is closed since no activity. If you still need help, please feel free to reply with an update to this discussion, or create another discussion.

Thanks,

Yixing

[YixingKong]

Thomas

Had your issue got resolved? If yes, we are going to close the discussion in 3 days. If you still need help, please feel free to reply with an update to this discussion.

Thanks,

Yixing

[raymondwang]

Why comment our this line?

//mxc_iomux_set_gpr_register(1,13,1,1);

Since your use GPIO1 as OTG ID input. This line is necessary.

  It should be same as MX6Q, I doubt your otg can work properly if this line is out.

[hitom]

In the GPR1 of the DL this Bit does not exist, but I have tried it also with this line!

[raymondwang]

Why? My 6DL RM has this bit definition. My RM version is Rev .1, 04/2013.

Thinking about your OTG issue. Please verify your OTG controller can get your VBUS and ID status properly.

You can confirm it with following command:

#cat /proc/driver/isp1504_otg

This command will print OTG Status register and OTG FSM state (a session valid,id state ,etc).

e.g If you connect a usb default deviec role cable to PC. VBUS shoud be supplied from PC, and b_session_valid

should 1, id state should be 1.

  This these states don't conform with your real state, your should check your hardware connection.

[hitom]

First of all thank you for your support!!!

You are right the bit exist in the new RM!

This is the output:

root@freescale ~$ cat /proc/driver/isp1504_otg

Freescale USB OTG Driver

fsl_usb2_otg version: $Revision: 1.55 $

OTGSC reg: 01201120

PORTSC reg: 1cd01000

USBMODE reg: 00000013

USBCMD reg: 00010004

USBSTS reg: 00001088

OTG state: UNDEFINED

a_bus_req: 1

b_bus_req: 0

a_bus_resume: 0

a_bus_suspend:0

a_conn: 0

a_sess_vld: 0

a_srp_det: 0

a_vbus_vld: 0

b_bus_resume: 0

b_bus_suspend: 0

b_conn: 0

b_se0_srp: 0

b_sess_end: 0

b_sess_vld: 0

id: 1

root@freescale ~$

I've also checked the hardware for many times, also compared to the running sabresd-board!

Thanks in advance!!!!

[raymondwang]

Check your OTG status register：

OTGSC reg: 01201120

Mine is

OTGSC reg: 09002d20

Check your VBus.