Eric Lee / smarc-uboot

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Commit 3e59f59015e39ceb870fa8a7a12e0464e775512b

Authored by Bin Meng
Committed by Marek Vasut
1 parent 7489d22a3c
Exists in smarc_8mq_lf_v2020.04 and in 17 other branches 8qm-imx_v2020.04_5.4.70_2.3.0, emb_lf_v2022.04, pitx_8mp_lf_v2020.04, smarc-8m-android-10.0.0_2.6.0, smarc-8m-android-11.0.0_2.0.0, smarc-8mp-android-11.0.0_2.0.0, smarc-imx6_v2018.03_4.14.98_2.0.0_ga, smarc-imx7_v2018.03_4.14.98_2.0.0_ga, smarc-imx_v2018.03_4.14.78_1.0.0_ga, smarc_8m-imx_v2018.03_4.14.98_2.0.0_ga, smarc_8m-imx_v2019.04_4.19.35_1.1.0, smarc_8m_00d0-imx_v2018.03_4.14.98_2.0.0_ga, smarc_8mm-imx_v2018.03_4.14.98_2.0.0_ga, smarc_8mm-imx_v2019.04_4.19.35_1.1.0, smarc_8mm-imx_v2020.04_5.4.24_2.1.0, smarc_8mp_lf_v2020.04, smarc_8mq-imx_v2020.04_5.4.24_2.1.0

dm: usb: Add a new USB controller operation 'get_max_xfer_size' 

The HCD may have limitation on the maximum bytes to be transferred
in a USB transfer. USB class driver needs to be aware of this.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>

Showing 2 changed files with 32 additions and 1 deletions Side-by-side Diff

drivers/usb/host/usb-uclass.c
Diff comments   View file @ 3e59f59
... ... @@ -150,6 +150,17 @@
150 150 return ops->update_hub_device(bus, udev);
151 151 }
152 152  
  153 +int usb_get_max_xfer_size(struct usb_device *udev, size_t *size)
  154 +{
  155 + struct udevice *bus = udev->controller_dev;
  156 + struct dm_usb_ops *ops = usb_get_ops(bus);
  157 +
  158 + if (!ops->get_max_xfer_size)
  159 + return -ENOSYS;
  160 +
  161 + return ops->get_max_xfer_size(bus, size);
  162 +}
  163 +
153 164 int usb_stop(void)
154 165 {
155 166 struct udevice *bus;
... ... @@ -766,6 +766,14 @@
766 766 * representation of this hub can be updated (xHCI)
767 767 */
768 768 int (*update_hub_device)(struct udevice *bus, struct usb_device *udev);
  769 +
  770 + /**
  771 + * get_max_xfer_size() - Get HCD's maximum transfer bytes
  772 + *
  773 + * The HCD may have limitation on the maximum bytes to be transferred
  774 + * in a USB transfer. USB class driver needs to be aware of this.
  775 + */
  776 + int (*get_max_xfer_size)(struct udevice *bus, size_t *size);
769 777 };
770 778  
771 779 #define usb_get_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
... ... @@ -939,7 +947,7 @@
939 947 int usb_alloc_device(struct usb_device *dev);
940 948  
941 949 /**
942   - * update_hub_device() - Update HCD's internal representation of hub
  950 + * usb_update_hub_device() - Update HCD's internal representation of hub
943 951 *
944 952 * After a hub descriptor is fetched, notify HCD so that its internal
945 953 * representation of this hub can be updated.
... ... @@ -948,6 +956,18 @@
948 956 * @return 0 if OK, -ve on error
949 957 */
950 958 int usb_update_hub_device(struct usb_device *dev);
  959 +
  960 +/**
  961 + * usb_get_max_xfer_size() - Get HCD's maximum transfer bytes
  962 + *
  963 + * The HCD may have limitation on the maximum bytes to be transferred
  964 + * in a USB transfer. USB class driver needs to be aware of this.
  965 + *
  966 + * @dev: USB device
  967 + * @size: maximum transfer bytes
  968 + * @return 0 if OK, -ve on error
  969 + */
  970 +int usb_get_max_xfer_size(struct usb_device *dev, size_t *size);
951 971  
952 972 /**
953 973 * usb_emul_setup_device() - Set up a new USB device emulation