ARM: dts: imx6qdl-wandboard: Add usbotg support

From: Fabio Estevam <[email protected]>

Tested via g_ether:

$ modprobe g_ether
using random self ethernet address
using random host ethernet address
usb0: HOST MAC 42:b5:26:a9:48:21
usb0: MAC 36:a6:85:9b:9e:13
using random self ethernet address
using random host ethernet address
g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
g_ether gadget: g_ether ready
$ g_ether gadget: high-speed config #1: CDC Ethernet (ECM)
$ ifconfig usb0 10.0.0.2

Then on the PC host side:

~$ sudo ifconfig usb0 10.0.0.1
~$ ping 10.0.0.2
PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data. 64 bytes from 10.0.0.2: icmp_req=1 ttl=64 time=1.26 ms 64 bytes from 10.0.0.2: icmp_req=2 ttl=64 time=0.280 ms 64 bytes from 10.0.0.2: icmp_req=3 ttl=64 time=0.297 ms

---
 arch/arm/boot/dts/imx6qdl-wandboard.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

index a55113e..b462080 100644
@@ -115,6 +115,14 @@
 	status = "okay";
 };
 
+&usbotg {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_usbotg_1>;
+	disable-over-current;
+	dr_mode = "peripheral";
+	status = "okay";
+};
+
 &usdhc1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_usdhc1_2>;

1.8.1.2

From: Fabio Estevam <[email protected]>

Testing g_ether results in the following:

[    1.648022] using random self ethernet address
[    1.652778] using random host ethernet address
[    1.660504] usb0: HOST MAC c6:28:6a:81:dc:ff
[    1.666360] usb0: MAC 7e:81:54:16:c0:c6
[    1.670504] using random self ethernet address
[    1.675842] using random host ethernet address
[    1.682655] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
[    1.689332] g_ether gadget: g_ether ready
[    3.328974] irq 237: nobody cared (try booting with the "irqpoll" option)
[    3.335831] CPU: 0 PID: 1 Comm: swapper Not tainted 3.11.0-rc6-next-20130819 #1035
[    3.343500] [<c0014258>] (unwind_backtrace+0x0/0xf0) from [<c0011b20>] (show_stack+0x10/0x14)
[    3.352098] [<c0011b20>] (show_stack+0x10/0x14) from [<c006af4c>] (__report_bad_irq+0x20/0xc0)
[    3.360763] [<c006af4c>] (__report_bad_irq+0x20/0xc0) from [<c006b3f4>] (note_interrupt+0x1d4/0x234)
[    3.369943] [<c006b3f4>] (note_interrupt+0x1d4/0x234) from [<c0069754>] (handle_irq_event_percpu+0xc4/0x268)
[    3.379815] [<c0069754>] (handle_irq_event_percpu+0xc4/0x268) from [<c0069934>] (handle_irq_event+0x3c/0x5c)
[    3.389686] [<c0069934>] (handle_irq_event+0x3c/0x5c) from [<c006bb78>] (handle_level_irq+0x8c/0xe8)
[    3.398865] [<c006bb78>] (handle_level_irq+0x8c/0xe8) from [<c0068ff0>] (generic_handle_irq+0x20/0x30)
[    3.408213] [<c0068ff0>] (generic_handle_irq+0x20/0x30) from [<c000fc9c>] (handle_IRQ+0x30/0x84)
[    3.417040] [<c000fc9c>] (handle_IRQ+0x30/0x84) from [<c0012564>] (__irq_svc+0x44/0x54)
[    3.425094] [<c0012564>] (__irq_svc+0x44/0x54) from [<c0020244>] (__do_softirq+0x90/0x268)
[    3.433400] [<c0020244>] (__do_softirq+0x90/0x268) from [<c00207d4>] (irq_exit+0x9c/0xd8)
[    3.441619] [<c00207d4>] (irq_exit+0x9c/0xd8) from [<c000fca0>] (handle_IRQ+0x34/0x84)
[    3.449577] [<c000fca0>] (handle_IRQ+0x34/0x84) from [<c0012564>] (__irq_svc+0x44/0x54)
[    3.457629] [<c0012564>] (__irq_svc+0x44/0x54) from [<c04602b0>] (_raw_spin_unlock_irqrestore+0x34/0x44)
[    3.467164] [<c04602b0>] (_raw_spin_unlock_irqrestore+0x34/0x44) from [<c0348298>] (input_register_handler+0x98/0xb4)
[    3.477835] [<c0348298>] (input_register_handler+0x98/0xb4) from [<c064bc10>] (mousedev_init+0x30/0x60)
[    3.487275] [<c064bc10>] (mousedev_init+0x30/0x60) from [<c00088ac>] (do_one_initcall+0xe8/0x154)
[    3.496198] [<c00088ac>] (do_one_initcall+0xe8/0x154) from [<c062aabc>] (kernel_init_freeable+0xf0/0x1b4)
[    3.505810] [<c062aabc>] (kernel_init_freeable+0xf0/0x1b4) from [<c0456550>] (kernel_init+0x8/0xe4)
[    3.514899] [<c0456550>] (kernel_init+0x8/0xe4) from [<c000ee60>] (ret_from_fork+0x14/0x34)
[    3.523263] handlers:
[    3.525578] [<c0339d14>] ci_irq
[    3.528757] Disabling IRQ #237

Provide the USB0_ID pin in the usb0 node, so that g_ether can operate correctly.

---
 arch/arm/boot/dts/imx28-evk.dts |  2 ++
 arch/arm/boot/dts/imx28.dtsi    | 10 ++++++++++
 2 files changed, 12 insertions(+)

index 15715d9..8cb6b6a 100644
@@ -242,6 +242,8 @@
 
 	ahb at 80080000 {
 		usb0: usb at 80080000 {
+			pinctrl-names = "default";
+			pinctrl-0 = <&usb0_id_pins_a>;
 			vbus-supply = <&reg_usb0_vbus>;
 			status = "okay";
 		};

index 7363fde..c596b6d 100644
@@ -740,6 +740,16 @@
 					fsl,voltage = <1>;
 					fsl,pull-up = <0>;
 				};
+
+				usb0_id_pins_a: usb0id at 0 {
+					reg = <0>;
+					fsl,pinmux-ids = <
+						0x3071 /* MX28_PAD_AUART1_RTS__USB0_ID */
+					>;
+					fsl,drive-strength = <2>;
+					fsl,voltage = <1>;
+					fsl,pull-up = <1>;
+				};
 			};
 
 			digctl: digctl at 8001c000 {

1.8.1.2

From: Fabio Estevam <[email protected]>

Trying to use the usb otg port on mx53qsb results in the following error:

$ modprobe g_ether
using random self ethernet address
using random host ethernet address
usb0: HOST MAC 52:0f:8a:1e:aa:09
usb0: MAC de:f3:70:d8:6c:62
using random self ethernet address
using random host ethernet address
g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
g_ether gadget: g_ether ready

(Connect the USB cable)

$ ci_hdrc ci_hdrc.0: remove, state 4
usb usb1: USB disconnect, device number 1
ci_hdrc ci_hdrc.0: USB bus 1 deregistered
ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11

USB otg port goes to connector J3 (mini USB) and also to the USB combo (J2).

As mx53qsb does not provide a USB ID pin, pass the dr_mode as 'peripheral' so that we can have usb device working.

Tested via g_ether.

---
 arch/arm/boot/dts/imx53-qsb.dts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

index e97ddae..94597c3 100644
@@ -318,5 +318,6 @@
 };
 
 &usbotg {
-       status = "okay";
+	dr_mode = "peripheral";
+	status = "okay";
 };

1.8.1.2

Applied all 3, thanks.

Shawn