[U-Boot] [PATCH v1 1/4] usb: host: ehci-vf: Migrate Vybrid USB to driver model
maitysanchayan at gmail.com
maitysanchayan at gmail.com
Mon Aug 8 08:15:35 CEST 2016
Hello,
On 16-08-03 17:13:11, Marek Vasut wrote:
> On 08/03/2016 01:58 PM, Sanchayan Maity wrote:
> > Add driver model support for Vybrid USB driver.
> >
> > Signed-off-by: Sanchayan Maity <maitysanchayan at gmail.com>
>
> CCing Lukasz.
>
> > ---
> > Hello,
> >
> > I am trying to migrate the Vybrid USB driver to driver model.
> > Patches are based on top of uboot master branch. With this
> > implementation, host works perfectly fine on both USB ports
> > but I have problems using it in client mode.
> >
> > I tried DFU to test client mode and I get the following
> >
> > Colibri VFxx # version
> >
> > U-Boot 2016.09-rc1-00235-g4e8c122 (Aug 03 2016 - 17:07:48 +0530)
> > arm-linux-gnueabihf-gcc (Linaro GCC 5.2-2015.11-2) 5.2.1 20151005
> > GNU ld (GNU Binutils) 2.25.0 Linaro 2015_10
> > Colibri VFxx # dfu 0 nand 4
> > using id 'nand0,0'
> > using id 'nand0,1'
> > using id 'nand0,3'
> > g_dnl_register: failed!, error: -19
> > data abort
> > pc : [<8ff80f18>] lr : [<8ff612a9>]
> > reloc pc : [<3f431f18>] lr : [<3f4122a9>]
> > sp : 8fd15000 ip : 00000000 fp : 00002710
> > r10: 8ffb50cc r9 : 8fd16ee8 r8 : 8ffbc574
> > r7 : 00000000 r6 : 00000000 r5 : 00000000 r4 : 00000000
> > r3 : 0000f4b9 r2 : 80000000 r1 : 00000001 r0 : 00000000
> > Flags: nZCv IRQs off FIQs off Mode SVC_32
> > Resetting CPU ...
> >
> > resetting ...
FWIW here is output with DEBUG enabled in uclass.c
when testing with DFU:
uclass_find_device_by_seq: 1 0
- -1 -1
- -1 -1
- not found
g_dnl_register: failed!, error: -19
data abort
pc : [<8ff80fb0>] lr : [<8ff612a9>]
reloc pc : [<3f431fb0>] lr : [<3f4122a9>]
sp : 8fd15000 ip : 00000000 fp : 00002710
r10: 8ffb5274 r9 : 8fd16ee8 r8 : 8ffbc714
r7 : 00000000 r6 : 00000000 r5 : 00000000 r4 : 00000000
r3 : 0000f4b9 r2 : 80000000 r1 : 00000001 r0 : 00000000
Flags: nZCv IRQs off FIQs off Mode SVC_32
Resetting CPU ...
resetting ...
When testing host mode with usb start
Colibri VFxx # usb start
starting USB...
USB0: uclass_find_device_by_seq: 0 -1
uclass_find_device_by_seq: 0 0
- -1 -1
- -1 -1
- not found
USB EHCI 1.00
USB1: uclass_find_device_by_seq: 0 -1
uclass_find_device_by_seq: 0 0
- -1 0
- found
uclass_find_device_by_seq: 0 1
- -1 0
- -1 1
- found
uclass_find_device_by_seq: 0 2
- -1 0
- -1 1
- -1 -1
- not found
uclass_find_device_by_seq: 0 -1
uclass_find_device_by_seq: 0 0
- -1 0
- found
uclass_find_device_by_seq: 0 1
- -1 0
- -1 -1
- not found
USB EHCI 1.00
scanning bus 0 for devices... uclass_find_device_by_seq: 0 -1
uclass_find_device_by_seq: 0 0
- -1 -1
- not found
uclass_find_device_by_seq: 0 -1
uclass_find_device_by_seq: 0 0
- -1 -1
- not found
2 USB Device(s) found
scanning bus 1 for devices... uclass_find_device_by_seq: 0 -1
uclass_find_device_by_seq: 0 0
- -1 0
- found
uclass_find_device_by_seq: 0 1
- -1 0
- -1 -1
- not found
uclass_find_device_by_seq: 0 -1
uclass_find_device_by_seq: 0 0
- -1 0
- found
uclass_find_device_by_seq: 0 1
- -1 0
- -1 1
- found
uclass_find_device_by_seq: 0 2
- -1 0
- -1 1
- -1 -1
- not found
2 USB Device(s) found
Regards,
Sanchayan.
> >
> > It seems to return ENODEV from usb_setup_ehci_gadget after calling
> > uclass_find_device_by_seq. I am not sure what I am missing in the
> > current implementation. Can someone point me in the correct direction?
> > Since host works on both ports I would assume the device tree nodes
> > are correct.
> >
> > Tried to look in documentation and usb-info.txt mentions that gadget
> > framework does not use driver model. Does this imply I cannot use
> > any usb gadget functionality if I am using USB DM? However the function
> > usb_gadget_register_driver in ci_udc.c does have a CONFIG_DM_USB and
> > calls into usb_setup_ehci_gadget which is in usb-uclass.c.
> >
> > Regards,
> > Sanchayan.
> > ---
> > drivers/usb/host/ehci-vf.c | 123 ++++++++++++++++++++++++++++++++++++++++++---
> > 1 file changed, 117 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/usb/host/ehci-vf.c b/drivers/usb/host/ehci-vf.c
> > index 61789dd..8c5c593 100644
> > --- a/drivers/usb/host/ehci-vf.c
> > +++ b/drivers/usb/host/ehci-vf.c
> > @@ -8,6 +8,7 @@
> > */
> >
> > #include <common.h>
> > +#include <dm.h>
> > #include <usb.h>
> > #include <errno.h>
> > #include <linux/compiler.h>
> > @@ -131,6 +132,24 @@ int __weak board_ehci_hcd_init(int port)
> > return 0;
> > }
> >
> > +int ehci_vf_common_init(struct usb_ehci *ehci, int index)
> > +{
> > + int ret;
> > +
> > + /* Do board specific initialisation */
> > + ret = board_ehci_hcd_init(index);
> > + if (ret)
> > + return ret;
> > +
> > + usb_power_config(index);
> > + usb_oc_config(index);
> > + usb_internal_phy_clock_gate(index);
> > + usb_phy_enable(index, ehci);
> > +
> > + return 0;
> > +}
> > +
> > +#ifndef CONFIG_DM_USB
> > int ehci_hcd_init(int index, enum usb_init_type init,
> > struct ehci_hccr **hccr, struct ehci_hcor **hcor)
> > {
> > @@ -143,12 +162,9 @@ int ehci_hcd_init(int index, enum usb_init_type init,
> > ehci = (struct usb_ehci *)nc_reg_bases[index];
> >
> > /* Do board specific initialisation */
> > - board_ehci_hcd_init(index);
> > -
> > - usb_power_config(index);
> > - usb_oc_config(index);
> > - usb_internal_phy_clock_gate(index);
> > - usb_phy_enable(index, ehci);
> > + ret = ehci_vf_common_init(index);
> > + if (ret)
> > + return ret;
> >
> > *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
> > *hcor = (struct ehci_hcor *)((uint32_t)*hccr +
> > @@ -175,3 +191,98 @@ int ehci_hcd_stop(int index)
> > {
> > return 0;
> > }
> > +#else
> > +struct ehci_vf_priv_data {
> > + struct ehci_ctrl ctrl;
> > + struct usb_ehci *ehci;
> > + enum usb_init_type init_type;
> > + int portnr;
> > +};
> > +
> > +static int vf_init_after_reset(struct ehci_ctrl *dev)
> > +{
> > + struct ehci_vf_priv_data *priv = dev->priv;
> > + enum usb_init_type type = priv->init_type;
> > + struct usb_ehci *ehci = priv->ehci;
> > + int ret;
> > +
> > + ret = ehci_vf_common_init(priv->ehci, priv->portnr);
> > + if (ret)
> > + return ret;
> > +
> > + if (type == USB_INIT_DEVICE)
> > + return 0;
> > +
> > + setbits_le32(&ehci->usbmode, CM_HOST);
> > + writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc);
> > + setbits_le32(&ehci->portsc, USB_EN);
> > +
> > + mdelay(10);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct ehci_ops vf_ehci_ops = {
> > + .init_after_reset = vf_init_after_reset
> > +};
> > +
> > +static int ehci_usb_probe(struct udevice *dev)
> > +{
> > + struct usb_platdata *plat = dev_get_platdata(dev);
> > + struct usb_ehci *ehci = (struct usb_ehci *)dev_get_addr(dev);
> > + struct ehci_vf_priv_data *priv = dev_get_priv(dev);
> > + struct ehci_hccr *hccr;
> > + struct ehci_hcor *hcor;
> > + int ret;
> > +
> > + priv->ehci = ehci;
> > + priv->portnr = dev->seq;
> > + priv->init_type = plat->init_type;
> > +
> > + ret = ehci_vf_common_init(ehci, priv->portnr);
> > + if (ret)
> > + return ret;
> > +
> > + if (priv->init_type == USB_INIT_HOST) {
> > + setbits_le32(&ehci->usbmode, CM_HOST);
> > + writel((PORT_PTS_UTMI | PORT_PTS_PTW), &ehci->portsc);
> > + setbits_le32(&ehci->portsc, USB_EN);
> > + }
> > +
> > + mdelay(10);
> > +
> > + hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
> > + hcor = (struct ehci_hcor *)((uint32_t)hccr +
> > + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
> > +
> > + return ehci_register(dev, hccr, hcor, &vf_ehci_ops, 0, plat->init_type);
> > +}
> > +
> > +static int ehci_usb_remove(struct udevice *dev)
> > +{
> > + int ret;
> > +
> > + ret = ehci_deregister(dev);
> > + if (ret)
> > + return ret;
> > +
> > + return 0;
> > +}
> > +
> > +static const struct udevice_id vf_usb_ids[] = {
> > + { .compatible = "fsl,vf610-usb" },
> > + { }
> > +};
> > +
> > +U_BOOT_DRIVER(usb_ehci) = {
> > + .name = "ehci_vf",
> > + .id = UCLASS_USB,
> > + .of_match = vf_usb_ids,
> > + .probe = ehci_usb_probe,
> > + .remove = ehci_usb_remove,
> > + .ops = &ehci_usb_ops,
> > + .platdata_auto_alloc_size = sizeof(struct usb_platdata),
> > + .priv_auto_alloc_size = sizeof(struct ehci_vf_priv_data),
> > + .flags = DM_FLAG_ALLOC_PRIV_DMA,
> > +};
> > +#endif
> >
>
>
> --
> Best regards,
> Marek Vasut
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