Hi,
On 07/11/2015 08:04 AM, Hans de Goede wrote:
Hi,
On 10-07-15 17:31, Bin Liu wrote:
Hi,
On 07/10/2015 10:12 AM, Heiko Schocher wrote:
Hello Samuel,
Am 10.07.2015 um 16:50 schrieb Egli, Samuel:
Hi Hans,
-----Original Message----- From: Hans de Goede [mailto:hdegoede@redhat.com] Sent: Freitag, 10. Juli 2015 16:37 To: Egli, Samuel; marex@denx.de Cc: u-boot@lists.denx.de; trini@konsulko.com; Bin Liu; Meier, Roger; Daniel Mack Subject: Re: [U-Boot] [PATCH] musb: set MUSB speed based on CONFIG
Hi,
On 10-07-15 16:30, Hans de Goede wrote:
Hi,
On 10-07-15 15:16, Samuel Egli wrote: > From: Bin Liu b-liu@ti.com > > Do not config MUSB to highspeed mode if > CONFIG_USB_GADGET_DUALSPEED is not set, in which case Ether > gadget only operates in fullspeed. > > Note: This patch is necessary for devices like some siemens > boards that allow only FULL SPEED USB 1.1, e.g. DFU > download. > > Signed-off-by: Bin Liu b-liu@ti.com Reviewed-by: Tom Rini > trini@konsulko.com Tested-by: Samuel Egli > samuel.egli@siemens.com CC: Marek Vasut marex@denx.de CC: > Heiko Schocher hs@denx.de CC: Daniel Mack > zonque@gmail.com CC: Roger Meier r.meier@siemens.com
Nack this breaks highspeed mode on boards which use the musb in host mode, and thus do not set CONFIG_USB_GADGET_DUALSPEED.
My bad, I had a short thought about this when I was initially working on this patch, but did not really think about it throughly. Thanks for bring it up.
p.s.
Given that you want to use this as a hack to work around the broken pcb design of your board I suggest adding a new option for this
Well, lets not discuss the "broken" pcb design. It seems that wiring protection is not that common. Unfortunately, such a protection is too expensive for USB High speed :-(.
Agreed, we have seen many cases that have nothing to do with hardware design, but MUSB has to work in full-speed mode.
titled: CONFIG_USB_MUSB_NO_HIGHSPEED and then do:
+#ifndef CONFIG_USB_MUSB_NO_HIGHSPEED | MUSB_POWER_HSENAB +#endif
This would be good enough. The point is indeed to limit it to full speed.
Using CONFIG_USB_GADGET_DUALSPEED for this seems wrong, since this has nothing to do with enabling dualspeed mode for the gadget code really.
I agree that the name is confusing.
Yes, I vote for Hans suggestion.
*Adding* a new macro CONFIG_USB_MUSB_NO_HIGHSPEED for musb driver causes CONFIG_USB_GADGET_DUALSPEED redundant, because both control for full-speed.
I suggest to *rename* CONFIG_USB_GADGET_DUALSPEED to CONFIG_USB_FULLSPEED_ONLY. So that we can use one macro for both gadget and musb drivers. Considering supper-speed exists and future, I think CONFIG_USB_NO_HIGHSPEED is confusing...
Sorry I was too fast. "CONFIG_USB_FULLSPEED_ONLY" is IMHO not acceptable as it is not granular enough. sunxi boards have both EHCI/OHCI usb controller pairs for host ports and an musb controller. One may be limited to fullspeed while the other is not.
Likewise I can see a case where some ports but not all ports are fullspeed only, so we still want to build the gadged code with dual-speed descriptors.
Good point.
I really believe that something like:
CONFIG_MUSB_FULLSPEED_ONLY
I am not sure like the idea of using two macros in config.h to control one thing. Please review the following patch which uses CONFIG_USB_GADGET_DUALSPEED and musb->board_mode instead. Beware that this patch is not tested.
diff --git a/drivers/usb/musb-new/musb_core.c b/drivers/usb/musb-new/musb_core.c index eeaacdf..55d1c20 100644 --- a/drivers/usb/musb-new/musb_core.c +++ b/drivers/usb/musb-new/musb_core.c @@ -931,6 +931,7 @@ void musb_start(struct musb *musb) { void __iomem *regs = musb->mregs; u8 devctl = musb_readb(regs, MUSB_DEVCTL); + u8 power;
dev_dbg(musb->controller, "<== devctl %02x\n", devctl);
@@ -942,11 +943,12 @@ void musb_start(struct musb *musb) musb_writeb(regs, MUSB_TESTMODE, 0);
/* put into basic highspeed mode and start session */ - musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE - | MUSB_POWER_HSENAB - /* ENSUSPEND wedges tusb */ - /* | MUSB_POWER_ENSUSPEND */ - ); + power = MUSB_POWER_ISOUPDATE | MUSB_POWER_HSENAB; +#ifndef CONFIG_USB_GADGET_DUALSPEED + if (musb->board_mode != MUSB_HOST) + power &= ~MUSB_POWER_HSENAB; +#endif + musb_writeb(regs, MUSB_POWER, power);
musb->is_active = 0; devctl = musb_readb(regs, MUSB_DEVCTL); diff --git a/drivers/usb/musb-new/musb_uboot.c b/drivers/usb/musb-new/musb_uboot.c index 85d3027..c240032 100644 --- a/drivers/usb/musb-new/musb_uboot.c +++ b/drivers/usb/musb-new/musb_uboot.c @@ -176,7 +176,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver) { int ret;
- if (!driver || driver->speed < USB_SPEED_HIGH || !driver->bind || + if (!driver || driver->speed < USB_SPEED_FULL || !driver->bind || !driver->setup) { printf("bad parameter.\n"); return -EINVAL;
Regards, -Bin.
Is what we need here, as that sets things at the granularity which we may need in some cases.
Regards,
Hans