149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*/
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/usb/msm_hsusb.h>
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#include <linux/usb_bam.h>
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#include "gadget_chips.h"
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struct usb_qdss_bam_connect_info {
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u32 usb_bam_pipe_idx;
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u32 peer_pipe_idx;
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unsigned long usb_bam_handle;
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struct sps_mem_buffer *data_fifo;
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};
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static struct usb_qdss_bam_connect_info bam_info;
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int send_sps_req(struct usb_ep *data_ep)
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{
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struct usb_request *req = NULL;
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struct f_qdss *qdss = data_ep->driver_data;
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struct usb_gadget *gadget = qdss->cdev->gadget;
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u32 sps_params = 0;
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pr_debug("send_sps_req\n");
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req = usb_ep_alloc_request(data_ep, GFP_ATOMIC);
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if (!req) {
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pr_err("usb_ep_alloc_request failed\n");
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return -ENOMEM;
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}
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if (gadget_is_dwc3(gadget)) {
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req->length = 32*1024;
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sps_params = MSM_SPS_MODE | MSM_DISABLE_WB |
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bam_info.usb_bam_pipe_idx;
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} else {
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/* non DWC3 BAM requires req->length to be 0 */
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req->length = 0;
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sps_params = (MSM_SPS_MODE | bam_info.usb_bam_pipe_idx |
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MSM_VENDOR_ID) & ~MSM_IS_FINITE_TRANSFER;
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}
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req->udc_priv = sps_params;
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qdss->endless_req = req;
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if (usb_ep_queue(data_ep, req, GFP_ATOMIC)) {
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pr_err("send_sps_req: usb_ep_queue error\n");
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return -EIO;
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}
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return 0;
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}
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static int set_qdss_data_connection(struct usb_gadget *gadget,
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struct usb_ep *data_ep, u8 data_addr, int enable)
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{
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enum usb_ctrl usb_bam_type;
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int res = 0;
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int idx;
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pr_debug("set_qdss_data_connection\n");
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usb_bam_type = usb_bam_get_bam_type(gadget->name);
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/* There is only one qdss pipe, so the pipe number can be set to 0 */
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idx = usb_bam_get_connection_idx(usb_bam_type, QDSS_P_BAM,
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PEER_PERIPHERAL_TO_USB, USB_BAM_DEVICE, 0);
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if (idx < 0) {
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pr_err("%s: usb_bam_get_connection_idx failed\n", __func__);
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return idx;
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}
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if (enable) {
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res = usb_bam_connect(usb_bam_type, idx,
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&(bam_info.usb_bam_pipe_idx));
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gadget->bam2bam_func_enabled = true;
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bam_info.data_fifo =
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kzalloc(sizeof(struct sps_mem_buffer), GFP_KERNEL);
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if (!bam_info.data_fifo) {
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pr_err("qdss_data_connection: memory alloc failed\n");
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return -ENOMEM;
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}
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get_bam2bam_connection_info(usb_bam_type, idx,
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&bam_info.usb_bam_handle,
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&bam_info.usb_bam_pipe_idx, &bam_info.peer_pipe_idx,
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NULL, bam_info.data_fifo, NULL);
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if (gadget_is_dwc3(gadget))
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msm_data_fifo_config(data_ep,
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bam_info.data_fifo->phys_base,
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bam_info.data_fifo->size,
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bam_info.usb_bam_pipe_idx);
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} else {
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kfree(bam_info.data_fifo);
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res = usb_bam_disconnect_pipe(usb_bam_type, idx);
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if (res) {
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pr_err("usb_bam_disconnection error\n");
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return res;
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}
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}
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return res;
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}
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int init_data(struct usb_ep *ep)
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{
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struct f_qdss *qdss = ep->driver_data;
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struct usb_gadget *gadget = qdss->cdev->gadget;
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int res = 0;
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pr_debug("init_data\n");
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if (gadget_is_dwc3(gadget)) {
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res = msm_ep_config(ep);
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if (res)
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pr_err("msm_ep_config failed\n");
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} else {
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pr_debug("QDSS is used with non DWC3 core\n");
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}
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return res;
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}
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int uninit_data(struct usb_ep *ep)
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{
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struct f_qdss *qdss = ep->driver_data;
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struct usb_gadget *gadget = qdss->cdev->gadget;
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int res = 0;
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pr_err("uninit_data\n");
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if (gadget_is_dwc3(gadget)) {
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res = msm_ep_unconfig(ep);
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if (res)
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pr_err("msm_ep_unconfig failed\n");
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}
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return res;
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}
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