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usb: gadget: config_ep_by_speed_and_alt instead of config_ep_by_speed 

This patch replace config_ep_by_speed with config_ep_by_speed_and_alt.
This change allows to select proper usb_ss_ep_comp_descriptor for each
stream capable endpoints.

f_tcm function for SS use array of headers for both BOT/UAS alternate
setting:

static struct usb_descriptor_header *uasp_ss_function_desc[] = {
        (struct usb_descriptor_header *) &bot_intf_desc,
        (struct usb_descriptor_header *) &uasp_ss_bi_desc,
        (struct usb_descriptor_header *) &bot_bi_ep_comp_desc,
        (struct usb_descriptor_header *) &uasp_ss_bo_desc,
        (struct usb_descriptor_header *) &bot_bo_ep_comp_desc,

        (struct usb_descriptor_header *) &uasp_intf_desc,
        (struct usb_descriptor_header *) &uasp_ss_bi_desc,
        (struct usb_descriptor_header *) &uasp_bi_ep_comp_desc,
        (struct usb_descriptor_header *) &uasp_bi_pipe_desc,
        (struct usb_descriptor_header *) &uasp_ss_bo_desc,
        (struct usb_descriptor_header *) &uasp_bo_ep_comp_desc,
        (struct usb_descriptor_header *) &uasp_bo_pipe_desc,
        (struct usb_descriptor_header *) &uasp_ss_status_desc,
        (struct usb_descriptor_header *) &uasp_status_in_ep_comp_desc,
        (struct usb_descriptor_header *) &uasp_status_pipe_desc,
        (struct usb_descriptor_header *) &uasp_ss_cmd_desc,
        (struct usb_descriptor_header *) &uasp_cmd_comp_desc,
        (struct usb_descriptor_header *) &uasp_cmd_pipe_desc,
        NULL,
};

The first 5 descriptors are associated with BOT alternate setting,
and others are associated with UAS.

During handling UAS alternate setting f_tcm driver invokes
config_ep_by_speed and this function sets incorrect companion endpoint
descriptor in usb_ep object.

Instead setting ep->comp_desc to uasp_bi_ep_comp_desc function in this
case set ep->comp_desc to bot_uasp_ss_bi_desc.

And in result it uses the descriptor from BOT alternate setting
instead UAS.

Finally, it causes that controller driver during enabling endpoints
detect that just enabled endpoint for bot.

Signed-off-by: Jayshri Pawar <jpawar@cadence.com>
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Reviewed-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Pawel Laszczak 2020-09-18 10:30:35 +02:00 committed by Felipe Balbi
parent 5bb1d11973
commit 864bc7e729
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/usb/gadget/function/f_tcm.c
View File

@ -392,12 +392,12 @@ static void bot_set_alt(struct f_uas *fu)
fu->flags = USBG_IS_BOT;
config_ep_by_speed(gadget, f, fu->ep_in);
config_ep_by_speed_and_alt(gadget, f, fu->ep_in, USB_G_ALT_INT_BBB);
ret = usb_ep_enable(fu->ep_in);
if (ret)
goto err_b_in;
config_ep_by_speed(gadget, f, fu->ep_out);
config_ep_by_speed_and_alt(gadget, f, fu->ep_out, USB_G_ALT_INT_BBB);
ret = usb_ep_enable(fu->ep_out);
if (ret)
goto err_b_out;
@ -852,21 +852,21 @@ static void uasp_set_alt(struct f_uas *fu)
if (gadget->speed >= USB_SPEED_SUPER)
fu->flags |= USBG_USE_STREAMS;
config_ep_by_speed(gadget, f, fu->ep_in);
config_ep_by_speed_and_alt(gadget, f, fu->ep_in, USB_G_ALT_INT_UAS);
ret = usb_ep_enable(fu->ep_in);
if (ret)
goto err_b_in;
config_ep_by_speed(gadget, f, fu->ep_out);
config_ep_by_speed_and_alt(gadget, f, fu->ep_out, USB_G_ALT_INT_UAS);
ret = usb_ep_enable(fu->ep_out);
if (ret)
goto err_b_out;
config_ep_by_speed(gadget, f, fu->ep_cmd);
config_ep_by_speed_and_alt(gadget, f, fu->ep_cmd, USB_G_ALT_INT_UAS);
ret = usb_ep_enable(fu->ep_cmd);
if (ret)
goto err_cmd;
config_ep_by_speed(gadget, f, fu->ep_status);
config_ep_by_speed_and_alt(gadget, f, fu->ep_status, USB_G_ALT_INT_UAS);
ret = usb_ep_enable(fu->ep_status);
if (ret)
goto err_status;