Hi,
On Mon, Aug 15, 2016 at 09:21:32PM +0200, Hans de Goede wrote:
> This allows run-time dr_mode switching support via the "mode" musb
> sysfs attribute.
>
> Signed-off-by: Hans de Goede <hdego...@redhat.com>
> ---
> drivers/usb/musb/sunxi.c | 52
> ++++++++++++++++++++++++++++++++++++++++++++----
> 1 file changed, 48 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c
> index c6ee166..1fe7451 100644
> --- a/drivers/usb/musb/sunxi.c
> +++ b/drivers/usb/musb/sunxi.c
> @@ -74,6 +74,7 @@
> #define SUNXI_MUSB_FL_HAS_SRAM 5
> #define SUNXI_MUSB_FL_HAS_RESET 6
> #define SUNXI_MUSB_FL_NO_CONFIGDATA 7
> +#define SUNXI_MUSB_FL_PHY_MODE_PEND 8
>
> /* Our read/write methods need access and do not get passed in a musb ref :|
> */
> static struct musb *sunxi_musb;
> @@ -87,6 +88,7 @@ struct sunxi_glue {
> struct phy *phy;
> struct platform_device *usb_phy;
> struct usb_phy *xceiv;
> + enum phy_mode phy_mode;
> unsigned long flags;
> struct work_struct work;
> struct extcon_dev *extcon;
> @@ -140,6 +142,9 @@ static void sunxi_musb_work(struct work_struct *work)
> clear_bit(SUNXI_MUSB_FL_PHY_ON, &glue->flags);
> }
> }
> +
> + if (test_and_clear_bit(SUNXI_MUSB_FL_PHY_MODE_PEND, &glue->flags))
> + phy_set_mode(glue->phy, glue->phy_mode);
> }
>
> static void sunxi_musb_set_vbus(struct musb *musb, int is_on)
> @@ -341,6 +346,41 @@ static void sunxi_musb_dma_controller_destroy(struct
> dma_controller *c)
> {
> }
>
> +static int sunxi_musb_set_mode(struct musb *musb, u8 mode)
> +{
> + struct sunxi_glue *glue = dev_get_drvdata(musb->controller->parent);
> + enum phy_mode new_mode;
> +
> + switch (mode) {
> + case MUSB_HOST: new_mode = PHY_MODE_USB_HOST; break;
> + case MUSB_PERIPHERAL: new_mode = PHY_MODE_USB_DEVICE; break;
> + case MUSB_OTG: new_mode = PHY_MODE_USB_OTG; break;
Please fix the code style as commented in patch 4/7.
> + default:
> + dev_err(musb->controller->parent,
> + "Error requested mode not supported by this kernel\n");
> + return -EINVAL;
> + }
> +
> + if (glue->phy_mode == new_mode)
> + return 0;
> +
> + if (musb->port_mode != MUSB_PORT_MODE_DUAL_ROLE) {
> + dev_err(musb->controller->parent,
> + "Error changing modes is only supported in dual role
> mode\n");
> + return -EINVAL;
> + }
> +
> + /*
> + * phy_set_mode may sleep, and we're called with a spinlock held,
> + * so let sunxi_musb_work deal with it.
> + */
> + glue->phy_mode = new_mode;
> + set_bit(SUNXI_MUSB_FL_PHY_MODE_PEND, &glue->flags);
> + schedule_work(&glue->work);
When switching from host to peripheral mode, if an usb device is still
plugged and enumerated, how do you handle the device disconnect?
Regards,
-Bin.
> +
> + return 0;
> +}
> +
> /*
> * sunxi musb register layout
> * 0x00 - 0x17 fifo regs, 1 long per fifo
> @@ -568,6 +608,7 @@ static const struct musb_platform_ops sunxi_musb_ops = {
> .writew = sunxi_musb_writew,
> .dma_init = sunxi_musb_dma_controller_create,
> .dma_exit = sunxi_musb_dma_controller_destroy,
> + .set_mode = sunxi_musb_set_mode,
> .set_vbus = sunxi_musb_set_vbus,
> .pre_root_reset_end = sunxi_musb_pre_root_reset_end,
> .post_root_reset_end = sunxi_musb_post_root_reset_end,
> @@ -614,21 +655,28 @@ static int sunxi_musb_probe(struct platform_device
> *pdev)
> return -EINVAL;
> }
>
> + glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
> + if (!glue)
> + return -ENOMEM;
> +
> memset(&pdata, 0, sizeof(pdata));
> switch (usb_get_dr_mode(&pdev->dev)) {
> #if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_HOST
> case USB_DR_MODE_HOST:
> pdata.mode = MUSB_PORT_MODE_HOST;
> + glue->phy_mode = PHY_MODE_USB_HOST;
> break;
> #endif
> #if defined CONFIG_USB_MUSB_DUAL_ROLE || defined CONFIG_USB_MUSB_GADGET
> case USB_DR_MODE_PERIPHERAL:
> pdata.mode = MUSB_PORT_MODE_GADGET;
> + glue->phy_mode = PHY_MODE_USB_DEVICE;
> break;
> #endif
> #ifdef CONFIG_USB_MUSB_DUAL_ROLE
> case USB_DR_MODE_OTG:
> pdata.mode = MUSB_PORT_MODE_DUAL_ROLE;
> + glue->phy_mode = PHY_MODE_USB_OTG;
> break;
> #endif
> default:
> @@ -638,10 +686,6 @@ static int sunxi_musb_probe(struct platform_device *pdev)
> pdata.platform_ops = &sunxi_musb_ops;
> pdata.config = &sunxi_musb_hdrc_config;
>
> - glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
> - if (!glue)
> - return -ENOMEM;
> -
> glue->dev = &pdev->dev;
> INIT_WORK(&glue->work, sunxi_musb_work);
> glue->host_nb.notifier_call = sunxi_musb_host_notifier;
> --
> 2.7.4
>
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