[PATCH 01/17] dm: usb: udc: Factor out plain udevice handler functions
Mattijs Korpershoek
mkorpershoek at baylibre.com
Tue Aug 22 18:07:49 CEST 2023
On sam., août 19, 2023 at 16:23, Marek Vasut <marex at denx.de> wrote:
> Pull the functionality of UDC uclass that operates on plain udevice
> and does not use this dev_array array into separate functions and
> expose those functions, so that as much code as possible can be
> switched over to these functions and the dev_array can be dropped.
>
> Signed-off-by: Marek Vasut <marex at denx.de>
> ---
> Cc: Angus Ainslie <angus at akkea.ca>
> Cc: Dmitrii Merkurev <dimorinny at google.com>
> Cc: Eddie Cai <eddie.cai.linux at gmail.com>
> Cc: Kever Yang <kever.yang at rock-chips.com>
> Cc: Lukasz Majewski <lukma at denx.de>
> Cc: Miquel Raynal <miquel.raynal at bootlin.com>
> Cc: Mattijs Korpershoek <mkorpershoek at baylibre.com>
> Cc: Nishanth Menon <nm at ti.com>
> Cc: Patrice Chotard <patrice.chotard at foss.st.com>
> Cc: Patrick Delaunay <patrick.delaunay at foss.st.com>
> Cc: Philipp Tomsich <philipp.tomsich at vrull.eu>
> Cc: Simon Glass <sjg at chromium.org>
> Cc: Stefan Roese <sr at denx.de>
> Cc: kernel at puri.sm
> ---
Reviewed-by: Mattijs Korpershoek <mkorpershoek at baylibre.com>
> drivers/usb/gadget/udc/Makefile | 2 +-
> drivers/usb/gadget/udc/udc-uclass.c | 57 +++++++++++++++++++++++++----
> include/linux/usb/gadget.h | 17 +++++++++
> 3 files changed, 68 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/usb/gadget/udc/Makefile b/drivers/usb/gadget/udc/Makefile
> index 95dbf0c82ee..467c566f6d3 100644
> --- a/drivers/usb/gadget/udc/Makefile
> +++ b/drivers/usb/gadget/udc/Makefile
> @@ -7,4 +7,4 @@ obj-$(CONFIG_USB_DWC3_GADGET) += udc-core.o
> endif
>
> obj-$(CONFIG_$(SPL_)DM_USB_GADGET) += udc-core.o
> -obj-$(CONFIG_$(SPL_)DM) += udc-uclass.o
> +obj-y += udc-uclass.o
> diff --git a/drivers/usb/gadget/udc/udc-uclass.c b/drivers/usb/gadget/udc/udc-uclass.c
> index de8861829c7..b4271b4be9f 100644
> --- a/drivers/usb/gadget/udc/udc-uclass.c
> +++ b/drivers/usb/gadget/udc/udc-uclass.c
> @@ -14,6 +14,37 @@
> #if CONFIG_IS_ENABLED(DM_USB_GADGET)
> #define MAX_UDC_DEVICES 4
> static struct udevice *dev_array[MAX_UDC_DEVICES];
> +
> +int udc_device_get_by_index(int index, struct udevice **udev)
> +{
> + struct udevice *dev = NULL;
> + int ret;
> +
> + ret = uclass_get_device_by_seq(UCLASS_USB_GADGET_GENERIC, index, &dev);
> + if (!ret && dev) {
> + *udev = dev;
> + return 0;
> + }
> +
> + ret = uclass_get_device(UCLASS_USB_GADGET_GENERIC, index, &dev);
> + if (!ret && dev) {
> + *udev = dev;
> + return 0;
> + }
> +
> + pr_err("No USB device found\n");
> + return -ENODEV;
> +}
> +
> +int udc_device_put(struct udevice *udev)
> +{
> +#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
> + return device_remove(udev, DM_REMOVE_NORMAL);
> +#else
> + return -ENOSYS;
> +#endif
> +}
> +
> int usb_gadget_initialize(int index)
> {
> int ret;
> @@ -23,13 +54,10 @@ int usb_gadget_initialize(int index)
> return -EINVAL;
> if (dev_array[index])
> return 0;
> - ret = uclass_get_device_by_seq(UCLASS_USB_GADGET_GENERIC, index, &dev);
> + ret = udc_device_get_by_index(index, &dev);
> if (!dev || ret) {
> - ret = uclass_get_device(UCLASS_USB_GADGET_GENERIC, index, &dev);
> - if (!dev || ret) {
> - pr_err("No USB device found\n");
> - return -ENODEV;
> - }
> + pr_err("No USB device found\n");
> + return -ENODEV;
> }
> dev_array[index] = dev;
> return 0;
> @@ -42,7 +70,7 @@ int usb_gadget_release(int index)
> if (index < 0 || index >= ARRAY_SIZE(dev_array))
> return -EINVAL;
>
> - ret = device_remove(dev_array[index], DM_REMOVE_NORMAL);
> + ret = device_remove(dev_array[index]);
> if (!ret)
> dev_array[index] = NULL;
> return ret;
> @@ -57,10 +85,25 @@ int usb_gadget_handle_interrupts(int index)
> return -EINVAL;
> return dm_usb_gadget_handle_interrupts(dev_array[index]);
> }
> +#else
> +/* Backwards hardware compatibility -- switch to DM_USB_GADGET */
> +static int legacy_index;
> +int udc_device_get_by_index(int index, struct udevice **udev)
> +{
> + legacy_index = index;
> + return board_usb_init(index, USB_INIT_DEVICE);
> +}
> +
> +int udc_device_put(struct udevice *udev)
> +{
> + return board_usb_cleanup(legacy_index, USB_INIT_DEVICE);
> +}
> #endif
>
> +#if CONFIG_IS_ENABLED(DM)
> UCLASS_DRIVER(usb_gadget_generic) = {
> .id = UCLASS_USB_GADGET_GENERIC,
> .name = "usb",
> .flags = DM_UC_FLAG_SEQ_ALIAS,
> };
> +#endif
> diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
> index 2f694fc25c1..5e9a6513d5b 100644
> --- a/include/linux/usb/gadget.h
> +++ b/include/linux/usb/gadget.h
> @@ -1006,6 +1006,23 @@ extern void usb_ep_autoconfig_reset(struct usb_gadget *);
>
> extern int usb_gadget_handle_interrupts(int index);
>
> +/**
> + * udc_device_get_by_index() - Get UDC udevice by index
> + * @index: UDC device index
> + * @udev: UDC udevice matching the index (if found)
> + *
> + * Return: 0 if Ok, -ve on error
> + */
> +int udc_device_get_by_index(int index, struct udevice **udev);
> +
> +/**
> + * udc_device_put() - Put UDC udevice
> + * @udev: UDC udevice
> + *
> + * Return: 0 if Ok, -ve on error
> + */
> +int udc_device_put(struct udevice *udev);
> +
> #if CONFIG_IS_ENABLED(DM_USB_GADGET)
> int usb_gadget_initialize(int index);
> int usb_gadget_release(int index);
> --
> 2.40.1
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