On Mon, Jul 22, 2013 at 03:40:32AM +0200, Marek Vasut wrote: > Dear Peter Chen, > > > On Mon, Jul 22, 2013 at 03:15:28AM +0200, Marek Vasut wrote: > > > Hi Peter, > > > > > > > On Fri, Jul 12, 2013 at 03:18:31PM +0200, Marek Vasut wrote: > > > > > Hi Peter, > > > > > > > > > > > On Fri, Jul 12, 2013 at 06:04:43AM +0200, Marek Vasut wrote: > > > > > > > Hi Peter, > > > > > > > > > > > > > > > On Thu, Jul 11, 2013 at 07:57:19PM +0200, Marek Vasut wrote: > > > > > > > > > Hi Peter, > > > > > > > > > > > > > > > > > > > This patchset adds tested otg id switch function and > > > > > > > > > > vbus connect and disconnect detection for chipidea driver. > > > > > > > > > > And fix kinds of bugs found at chipidea drivers after > > > > > > > > > > enabling id and vbus detection. > > > > > > > > > > > > > > > > > > > > This patch is fully tested at imx6 sabresd platform. > > > > > > > > > > My chipidea repo: > > > > > > > > > > https://github.com/hzpeterchen/linux-usb.git > > > > > > > > > > > > > > > > > > > > Changes for v12: > > > > > > > > > > - Rebased greg's usb-next tree (3.10.0-rc7+) > > > > > > > > > > - Split more small patches for single function and fix. > > > > > > > > > > > > > > > > > > I tested the patchset. Here are the results: > > > > > > > > > > > > > > > > > > - VBUS switching > > > > > > > > > > > > > > > > > > I'm no longer getting any ID interrupts at all when I apply > > > > > > > > > the patch below. The board stays in HOST mode all the time. > > > > > > > > > If I configure it as peripheral, it works as peripheral. > > > > > > > > > Note with [1], I was able to switch from Peripheral->Host , > > > > > > > > > not the other way around. > > > > > > > > > > > > > > > > Thanks for your testing. But first, can you have me check > > > > > > > > if your ID wakeup is enabled? > > > > > > > > > > > > > > ID wakeup? How do I check? > > > > > > > > > > > > See otgsc at controller register, the ID wakeup enable is bit 24. > > > > > > > > > > Yes, ID interrupt (IDIE) is set. > > > > > > > > > > I noticed this backtrace in the kernel bootlog, but this only happens > > > > > if the dr_mode="otg" , it comes from the host-mode irq handler : > > > > > > > > > > [ 2.757563] irq 238: nobody cared (try booting with the "irqpoll" > > > > > option) [ 2.764398] CPU: 0 PID: 1 Comm: swapper Not tainted > > > > > 3.10.0- next-20130711-00013-g011c4b3-dirty #703 > > > > > [ 2.773445] [<80013878>] (unwind_backtrace+0x0/0xe8) from > > > > > [<80011644>] (show_stack+0x10/0x14) > > > > > [ 2.782027] [<80011644>] (show_stack+0x10/0x14) from [<800659f4>] > > > > > (__report_bad_irq.isra.6+0x20/0xe0) > > > > > [ 2.791286] [<800659f4>] (__report_bad_irq.isra.6+0x20/0xe0) from > > > > > [<80065c98>] (note_interrupt+0x16c/0x230) > > > > > [ 2.801063] [<80065c98>] (note_interrupt+0x16c/0x230) from > > > > > [<80064000>] (handle_irq_event_percpu+0x10c/0x1a4) > > > > > [ 2.811010] [<80064000>] (handle_irq_event_percpu+0x10c/0x1a4) > > > > > from [<800640e8>] (handle_irq_event+0x50/0x78) > > > > > [ 2.820958] [<800640e8>] (handle_irq_event+0x50/0x78) from > > > > > [<8006652c>] (handle_level_irq+0x88/0x10c) > > > > > [ 2.830210] [<8006652c>] (handle_level_irq+0x88/0x10c) from > > > > > [<800638d0>] (generic_handle_irq+0x28/0x3c) > > > > > [ 2.839637] [<800638d0>] (generic_handle_irq+0x28/0x3c) from > > > > > [<8000f84c>] (handle_IRQ+0x30/0x84) > > > > > [ 2.848461] [<8000f84c>] (handle_IRQ+0x30/0x84) from [<80012160>] > > > > > (__irq_svc+0x40/0x6c) > > > > > [ 2.856510] [<80012160>] (__irq_svc+0x40/0x6c) from [<80022a44>] > > > > > (__do_softirq+0x90/0x1d8) > > > > > [ 2.864812] [<80022a44>] (__do_softirq+0x90/0x1d8) from > > > > > [<80022edc>] (irq_exit+0x98/0xd4) > > > > > [ 2.873025] [<80022edc>] (irq_exit+0x98/0xd4) from [<8000f850>] > > > > > (handle_IRQ+0x34/0x84) > > > > > [ 2.880980] [<8000f850>] (handle_IRQ+0x34/0x84) from [<80012160>] > > > > > (__irq_svc+0x40/0x6c) > > > > > [ 2.889020] [<80012160>] (__irq_svc+0x40/0x6c) from [<8001d724>] > > > > > (vprintk_emit+0x1bc/0x524) > > > > > [ 2.897411] [<8001d724>] (vprintk_emit+0x1bc/0x524) from > > > > > [<804da5a4>] (printk+0x30/0x40) > > > > > [ 2.905551] [<804da5a4>] (printk+0x30/0x40) from [<80630138>] > > > > > (mousedev_init+0x4c/0x60) > > > > > [ 2.913617] [<80630138>] (mousedev_init+0x4c/0x60) from > > > > > [<806178fc>] (do_one_initcall+0x94/0x14c) > > > > > [ 2.922537] [<806178fc>] (do_one_initcall+0x94/0x14c) from > > > > > [<80617b20>] (kernel_init_freeable+0x16c/0x22c) > > > > > [ 2.932230] [<80617b20>] (kernel_init_freeable+0x16c/0x22c) from > > > > > [<804d8cbc>] (kernel_init+0x8/0x150) > > > > > [ 2.941486] [<804d8cbc>] (kernel_init+0x8/0x150) from [<8000ea70>] > > > > > (ret_from_fork+0x14/0x24) > > > > > [ 2.949932] handlers: > > > > > [ 2.952227] [<8033fc58>] ci_irq > > > > > [ 2.955388] Disabling IRQ #238 > > > > > > > > Marek, I have a test at imx28evk (Freescale imx28evk) for this > > > > patchset, it works well for dual-role switch after adding below dts > > > > change. There is a kernel dump when works at udc mode(due to enable > > > > CONFIG_LOCKUP_DETECTOR), at the first connect, but it does not affect > > > > function, it should be a common chipidea problem, I will check later. > > > > > > Sorry for the long delay. I finally got further with this, at least now I > > > can switch Periph->Host again, but if I do so the other way around > > > (unplug host adapter and plug computer cable) and dump the controller > > > registers, I still see the controller in "host" (according to USBMODE > > > register) mode. The controller stays in HOST mode even if I force it to > > > gadget mode by writing "gadget" into debugfs "role" entry. I will keep > > > poking. > > > > > > In the meantime, I guess if it works on the EVK, it might be a hardware > > > error so I better stop stalling you. I'll drop you an email if I find > > > what this problem is. > > > > No, the problem is you did not config the USB OTG ID pin. > > Do the same thing I have done at imx28evk, you probably will work > > if the ID pin is the same at your board. > > That one I have configured, exactly the same way you did (except that mine is > MX28_PAD_PWM2__USB0_ID). > > If it was the OTG ID pin issue, would the manual switching not work ? > I can't see at your imx28-m28evk.dts, besides, make sure this pin can be configed as USB OTG ID pin, and fsl,pull-up = <1>. Since you are still at host mode, I suspect it is the ID problem. You can check if there is ID INT when unplug out B-to-A cable. I have not tried the manual switching, but first, you need to close your vbus supply. -- Best Regards, Peter Chen -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
