[PATCH 2/2] usb: dwc3: Implement .glue_configure for i.MX8MP

[Marek Vasut]

On 4/4/22 20:51, Tim Harvey wrote:
> On Fri, Apr 1, 2022 at 5:48 PM Marek Vasut <marex at denx.de> wrote:
>>
>> On 4/1/22 23:28, Tim Harvey wrote:
>>> On Fri, Apr 1, 2022 at 7:32 AM Marek Vasut <marex at denx.de> wrote:
>>>>
>>>> The i.MX8MP glue needs to be configured based on a couple of DT
>>>> properties, implement .glue_configure callback to parse those DT
>>>> properties and configure the glue accordingly.
>>>>
>>>> Signed-off-by: Marek Vasut <marex at denx.de>
>>>> Cc: Angus Ainslie <angus at akkea.ca>
>>>> Cc: Bin Meng <bmeng.cn at gmail.com>
>>>> Cc: Fabio Estevam <festevam at gmail.com>
>>>> Cc: Kunihiko Hayashi <hayashi.kunihiko at socionext.com>
>>>> Cc: Michal Simek <michal.simek at xilinx.com>
>>>> Cc: Peng Fan <peng.fan at nxp.com>
>>>> Cc: Stefano Babic <sbabic at denx.de>
>>>> ---
>>>>    drivers/usb/dwc3/dwc3-generic.c | 52 +++++++++++++++++++++++++++++++++
>>>>    1 file changed, 52 insertions(+)
>>>>
>>>> diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
>>>> index 7e3814207e4..6cf844cb483 100644
>>>> --- a/drivers/usb/dwc3/dwc3-generic.c
>>>> +++ b/drivers/usb/dwc3/dwc3-generic.c
>>>> @@ -223,6 +223,57 @@ struct dwc3_glue_ops {
>>>>                                  enum usb_dr_mode mode);
>>>>    };
>>>>
>>>> +void dwc3_imx8mp_glue_configure(struct udevice *dev, int index,
>>>> +                               enum usb_dr_mode mode)
>>>> +{
>>>> +/* USB glue registers */
>>>> +#define USB_CTRL0              0x00
>>>> +#define USB_CTRL1              0x04
>>>> +
>>>> +#define USB_CTRL0_PORTPWR_EN   BIT(12) /* 1 - PPC enabled (default) */
>>>> +#define USB_CTRL0_USB3_FIXED   BIT(22) /* 1 - USB3 permanent attached */
>>>> +#define USB_CTRL0_USB2_FIXED   BIT(23) /* 1 - USB2 permanent attached */
>>>> +
>>>> +#define USB_CTRL1_OC_POLARITY  BIT(16) /* 0 - HIGH / 1 - LOW */
>>>> +#define USB_CTRL1_PWR_POLARITY BIT(17) /* 0 - HIGH / 1 - LOW */
>>>> +       fdt_addr_t regs = dev_read_addr_index(dev, 1);
>>>> +       void *base = map_physmem(regs, 0x8, MAP_NOCACHE);
>>>> +       u32 value;
>>>> +
>>>> +       value = readl(base + USB_CTRL0);
>>>> +
>>>> +       if (dev_read_bool(dev, "fsl,permanently-attached"))
>>>> +               value |= (USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED);
>>>> +       else
>>>> +               value &= ~(USB_CTRL0_USB2_FIXED | USB_CTRL0_USB3_FIXED);
>>>> +
>>>> +       if (dev_read_bool(dev, "fsl,disable-port-power-control"))
>>>> +               value &= ~(USB_CTRL0_PORTPWR_EN);
>>>> +       else
>>>> +               value |= USB_CTRL0_PORTPWR_EN;
>>>> +
>>>> +       writel(value, base + USB_CTRL0);
>>>> +
>>>> +       value = readl(base + USB_CTRL1);
>>>> +       if (dev_read_bool(dev, "fsl,over-current-active-low"))
>>>> +               value |= USB_CTRL1_OC_POLARITY;
>>>> +       else
>>>> +               value &= ~USB_CTRL1_OC_POLARITY;
>>>> +
>>>> +       if (dev_read_bool(dev, "fsl,power-active-low"))
>>>> +               value |= USB_CTRL1_PWR_POLARITY;
>>>> +       else
>>>> +               value &= ~USB_CTRL1_PWR_POLARITY;
>>>> +
>>>> +       writel(value, base + USB_CTRL1);
>>>> +
>>>> +       unmap_physmem(base, MAP_NOCACHE);
>>>> +}
>>>> +
>>>> +struct dwc3_glue_ops imx8mp_ops = {
>>>> +       .glue_configure = dwc3_imx8mp_glue_configure,
>>>> +};
>>>> +
>>>>    void dwc3_ti_glue_configure(struct udevice *dev, int index,
>>>>                               enum usb_dr_mode mode)
>>>>    {
>>>> @@ -464,6 +515,7 @@ static const struct udevice_id dwc3_glue_ids[] = {
>>>>           { .compatible = "rockchip,rk3328-dwc3" },
>>>>           { .compatible = "rockchip,rk3399-dwc3" },
>>>>           { .compatible = "qcom,dwc3" },
>>>> +       { .compatible = "fsl,imx8mp-dwc3", .data = (ulong)&imx8mp_ops },
>>>>           { .compatible = "fsl,imx8mq-dwc3" },
>>>>           { .compatible = "intel,tangier-dwc3" },
>>>>           { }
>>>> --
>>>> 2.35.1
>>>>
>>>
>>> Marek,
>>>
>>> Looks like your working on IMX8MP USB support - thanks for that!
>>>
>>> I'm working on bring-up of an IMX8MP board and can test your
>>> power-domain and USB patches but I'm having trouble getting some of
>>> your patches to apply - do you have a repo I can pull from?
>>
>> https://source.denx.de/u-boot/custodians/u-boot-usb/-/commits/imx-8mp
> 
> Marek,
> 
> Thanks. I've thrown my board patches on top but don't get very far
> with regards to USB due to clk:
> U-Boot 2022.04-rc5-00085-gce6842669a59-dirty (Apr 04 2022 - 11:32:45 -0700)
> 
> CPU:   Freescale i.MX8MP[8] rev1.1 1600 MHz (running at 1200 MHz)
> CPU:   Industrial temperature grade (-40C to 105C) at 38C
> Reset cause: POR
> Model: Gateworks Venice GW74xx i.MX8MP board
> DRAM:  1 GiB
> clk_register: failed to get osc_32k device (parent of usb_root_clk)
> Core:  210 devices, 23 uclasses, devicetree: separate
> WDT:   Started watchdog at 30280000 with servicing (60s timeout)
> MMC:   FSL_SDHC: 0, FSL_SDHC: 2
> Loading Environment from nowhere... OK
> In:    serial at 30890000
> Out:   serial at 30890000
> Err:   serial at 30890000
> 
> u-boot=> usb start
> starting USB...
> Bus usb at 38100000: Port not available.
> Bus usb at 38200000: Port not available.
> 
> I see 'clk_register: failed to get osc_32k device (parent of
> usb_root_clk)' above yet clock-osc-32k seems to be there:

[...]

> I've got the following in my config:
> CONFIG_CLK_CCF=y
> CONFIG_CLK_COMPOSITE_CCF=y
> CONFIG_CLK_IMX8MP=y
> ...
> CONFIG_USB_XHCI_DWC3=y
> CONFIG_USB_XHCI_DWC3_OF_SIMPLE=y
> CONFIG_USB_DWC3=y
> CONFIG_USB_DWC3_GENERIC=y
> ...
> CONFIG_POWER_DOMAIN=y
> CONFIG_IMX8M_POWER_DOMAIN=y
> 
> Any ideas?

"Port not available" means device_probe() returns -ENODEV in usb uclass, 
maybe you're still missing some regulator driver or some such ? You'd 
have to dig into that.