summaryrefslogtreecommitdiffstats
path: root/drivers/usb/gadget/udc/bdc/bdc_ep.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/gadget/udc/bdc/bdc_ep.c')
-rw-r--r--drivers/usb/gadget/udc/bdc/bdc_ep.c2035
1 files changed, 2035 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/bdc/bdc_ep.c b/drivers/usb/gadget/udc/bdc/bdc_ep.c
new file mode 100644
index 000000000..fa88f210e
--- /dev/null
+++ b/drivers/usb/gadget/udc/bdc/bdc_ep.c
@@ -0,0 +1,2035 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * bdc_ep.c - BRCM BDC USB3.0 device controller endpoint related functions
+ *
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * Author: Ashwini Pahuja
+ *
+ * Based on drivers under drivers/usb/
+ */
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/dmapool.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include <linux/pm.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <asm/unaligned.h>
+#include <linux/platform_device.h>
+#include <linux/usb/composite.h>
+
+#include "bdc.h"
+#include "bdc_ep.h"
+#include "bdc_cmd.h"
+#include "bdc_dbg.h"
+
+static const char * const ep0_state_string[] = {
+ "WAIT_FOR_SETUP",
+ "WAIT_FOR_DATA_START",
+ "WAIT_FOR_DATA_XMIT",
+ "WAIT_FOR_STATUS_START",
+ "WAIT_FOR_STATUS_XMIT",
+ "STATUS_PENDING"
+};
+
+/* Free the bdl during ep disable */
+static void ep_bd_list_free(struct bdc_ep *ep, u32 num_tabs)
+{
+ struct bd_list *bd_list = &ep->bd_list;
+ struct bdc *bdc = ep->bdc;
+ struct bd_table *bd_table;
+ int index;
+
+ dev_dbg(bdc->dev, "%s ep:%s num_tabs:%d\n",
+ __func__, ep->name, num_tabs);
+
+ if (!bd_list->bd_table_array) {
+ dev_dbg(bdc->dev, "%s already freed\n", ep->name);
+ return;
+ }
+ for (index = 0; index < num_tabs; index++) {
+ /*
+ * check if the bd_table struct is allocated ?
+ * if yes, then check if bd memory has been allocated, then
+ * free the dma_pool and also the bd_table struct memory
+ */
+ bd_table = bd_list->bd_table_array[index];
+ dev_dbg(bdc->dev, "bd_table:%p index:%d\n", bd_table, index);
+ if (!bd_table) {
+ dev_dbg(bdc->dev, "bd_table not allocated\n");
+ continue;
+ }
+ if (!bd_table->start_bd) {
+ dev_dbg(bdc->dev, "bd dma pool not allocated\n");
+ continue;
+ }
+
+ dev_dbg(bdc->dev,
+ "Free dma pool start_bd:%p dma:%llx\n",
+ bd_table->start_bd,
+ (unsigned long long)bd_table->dma);
+
+ dma_pool_free(bdc->bd_table_pool,
+ bd_table->start_bd,
+ bd_table->dma);
+ /* Free the bd_table structure */
+ kfree(bd_table);
+ }
+ /* Free the bd table array */
+ kfree(ep->bd_list.bd_table_array);
+}
+
+/*
+ * chain the tables, by insteting a chain bd at the end of prev_table, pointing
+ * to next_table
+ */
+static inline void chain_table(struct bd_table *prev_table,
+ struct bd_table *next_table,
+ u32 bd_p_tab)
+{
+ /* Chain the prev table to next table */
+ prev_table->start_bd[bd_p_tab-1].offset[0] =
+ cpu_to_le32(lower_32_bits(next_table->dma));
+
+ prev_table->start_bd[bd_p_tab-1].offset[1] =
+ cpu_to_le32(upper_32_bits(next_table->dma));
+
+ prev_table->start_bd[bd_p_tab-1].offset[2] =
+ 0x0;
+
+ prev_table->start_bd[bd_p_tab-1].offset[3] =
+ cpu_to_le32(MARK_CHAIN_BD);
+}
+
+/* Allocate the bdl for ep, during config ep */
+static int ep_bd_list_alloc(struct bdc_ep *ep)
+{
+ struct bd_table *prev_table = NULL;
+ int index, num_tabs, bd_p_tab;
+ struct bdc *bdc = ep->bdc;
+ struct bd_table *bd_table;
+ dma_addr_t dma;
+
+ if (usb_endpoint_xfer_isoc(ep->desc))
+ num_tabs = NUM_TABLES_ISOCH;
+ else
+ num_tabs = NUM_TABLES;
+
+ bd_p_tab = NUM_BDS_PER_TABLE;
+ /* if there is only 1 table in bd list then loop chain to self */
+ dev_dbg(bdc->dev,
+ "%s ep:%p num_tabs:%d\n",
+ __func__, ep, num_tabs);
+
+ /* Allocate memory for table array */
+ ep->bd_list.bd_table_array = kcalloc(num_tabs,
+ sizeof(struct bd_table *),
+ GFP_ATOMIC);
+ if (!ep->bd_list.bd_table_array)
+ return -ENOMEM;
+
+ /* Allocate memory for each table */
+ for (index = 0; index < num_tabs; index++) {
+ /* Allocate memory for bd_table structure */
+ bd_table = kzalloc(sizeof(*bd_table), GFP_ATOMIC);
+ if (!bd_table)
+ goto fail;
+
+ bd_table->start_bd = dma_pool_zalloc(bdc->bd_table_pool,
+ GFP_ATOMIC,
+ &dma);
+ if (!bd_table->start_bd) {
+ kfree(bd_table);
+ goto fail;
+ }
+
+ bd_table->dma = dma;
+
+ dev_dbg(bdc->dev,
+ "index:%d start_bd:%p dma=%08llx prev_table:%p\n",
+ index, bd_table->start_bd,
+ (unsigned long long)bd_table->dma, prev_table);
+
+ ep->bd_list.bd_table_array[index] = bd_table;
+ if (prev_table)
+ chain_table(prev_table, bd_table, bd_p_tab);
+
+ prev_table = bd_table;
+ }
+ chain_table(prev_table, ep->bd_list.bd_table_array[0], bd_p_tab);
+ /* Memory allocation is successful, now init the internal fields */
+ ep->bd_list.num_tabs = num_tabs;
+ ep->bd_list.max_bdi = (num_tabs * bd_p_tab) - 1;
+ ep->bd_list.num_tabs = num_tabs;
+ ep->bd_list.num_bds_table = bd_p_tab;
+ ep->bd_list.eqp_bdi = 0;
+ ep->bd_list.hwd_bdi = 0;
+
+ return 0;
+fail:
+ /* Free the bd_table_array, bd_table struct, bd's */
+ ep_bd_list_free(ep, num_tabs);
+
+ return -ENOMEM;
+}
+
+/* returns how many bd's are need for this transfer */
+static inline int bd_needed_req(struct bdc_req *req)
+{
+ int bd_needed = 0;
+ int remaining;
+
+ /* 1 bd needed for 0 byte transfer */
+ if (req->usb_req.length == 0)
+ return 1;
+
+ /* remaining bytes after tranfering all max BD size BD's */
+ remaining = req->usb_req.length % BD_MAX_BUFF_SIZE;
+ if (remaining)
+ bd_needed++;
+
+ /* How many maximum BUFF size BD's ? */
+ remaining = req->usb_req.length / BD_MAX_BUFF_SIZE;
+ bd_needed += remaining;
+
+ return bd_needed;
+}
+
+/* returns the bd index(bdi) corresponding to bd dma address */
+static int bd_add_to_bdi(struct bdc_ep *ep, dma_addr_t bd_dma_addr)
+{
+ struct bd_list *bd_list = &ep->bd_list;
+ dma_addr_t dma_first_bd, dma_last_bd;
+ struct bdc *bdc = ep->bdc;
+ struct bd_table *bd_table;
+ bool found = false;
+ int tbi, bdi;
+
+ dma_first_bd = dma_last_bd = 0;
+ dev_dbg(bdc->dev, "%s %llx\n",
+ __func__, (unsigned long long)bd_dma_addr);
+ /*
+ * Find in which table this bd_dma_addr belongs?, go through the table
+ * array and compare addresses of first and last address of bd of each
+ * table
+ */
+ for (tbi = 0; tbi < bd_list->num_tabs; tbi++) {
+ bd_table = bd_list->bd_table_array[tbi];
+ dma_first_bd = bd_table->dma;
+ dma_last_bd = bd_table->dma +
+ (sizeof(struct bdc_bd) *
+ (bd_list->num_bds_table - 1));
+ dev_dbg(bdc->dev, "dma_first_bd:%llx dma_last_bd:%llx\n",
+ (unsigned long long)dma_first_bd,
+ (unsigned long long)dma_last_bd);
+ if (bd_dma_addr >= dma_first_bd && bd_dma_addr <= dma_last_bd) {
+ found = true;
+ break;
+ }
+ }
+ if (unlikely(!found)) {
+ dev_err(bdc->dev, "%s FATAL err, bd not found\n", __func__);
+ return -EINVAL;
+ }
+ /* Now we know the table, find the bdi */
+ bdi = (bd_dma_addr - dma_first_bd) / sizeof(struct bdc_bd);
+
+ /* return the global bdi, to compare with ep eqp_bdi */
+ return (bdi + (tbi * bd_list->num_bds_table));
+}
+
+/* returns the table index(tbi) of the given bdi */
+static int bdi_to_tbi(struct bdc_ep *ep, int bdi)
+{
+ int tbi;
+
+ tbi = bdi / ep->bd_list.num_bds_table;
+ dev_vdbg(ep->bdc->dev,
+ "bdi:%d num_bds_table:%d tbi:%d\n",
+ bdi, ep->bd_list.num_bds_table, tbi);
+
+ return tbi;
+}
+
+/* Find the bdi last bd in the transfer */
+static inline int find_end_bdi(struct bdc_ep *ep, int next_hwd_bdi)
+{
+ int end_bdi;
+
+ end_bdi = next_hwd_bdi - 1;
+ if (end_bdi < 0)
+ end_bdi = ep->bd_list.max_bdi - 1;
+ else if ((end_bdi % (ep->bd_list.num_bds_table-1)) == 0)
+ end_bdi--;
+
+ return end_bdi;
+}
+
+/*
+ * How many transfer bd's are available on this ep bdl, chain bds are not
+ * counted in available bds
+ */
+static int bd_available_ep(struct bdc_ep *ep)
+{
+ struct bd_list *bd_list = &ep->bd_list;
+ int available1, available2;
+ struct bdc *bdc = ep->bdc;
+ int chain_bd1, chain_bd2;
+ int available_bd = 0;
+
+ available1 = available2 = chain_bd1 = chain_bd2 = 0;
+ /* if empty then we have all bd's available - number of chain bd's */
+ if (bd_list->eqp_bdi == bd_list->hwd_bdi)
+ return bd_list->max_bdi - bd_list->num_tabs;
+
+ /*
+ * Depending upon where eqp and dqp pointers are, caculate number
+ * of avaialble bd's
+ */
+ if (bd_list->hwd_bdi < bd_list->eqp_bdi) {
+ /* available bd's are from eqp..max_bds + 0..dqp - chain_bds */
+ available1 = bd_list->max_bdi - bd_list->eqp_bdi;
+ available2 = bd_list->hwd_bdi;
+ chain_bd1 = available1 / bd_list->num_bds_table;
+ chain_bd2 = available2 / bd_list->num_bds_table;
+ dev_vdbg(bdc->dev, "chain_bd1:%d chain_bd2:%d\n",
+ chain_bd1, chain_bd2);
+ available_bd = available1 + available2 - chain_bd1 - chain_bd2;
+ } else {
+ /* available bd's are from eqp..dqp - number of chain bd's */
+ available1 = bd_list->hwd_bdi - bd_list->eqp_bdi;
+ /* if gap between eqp and dqp is less than NUM_BDS_PER_TABLE */
+ if ((bd_list->hwd_bdi - bd_list->eqp_bdi)
+ <= bd_list->num_bds_table) {
+ /* If there any chain bd in between */
+ if (!(bdi_to_tbi(ep, bd_list->hwd_bdi)
+ == bdi_to_tbi(ep, bd_list->eqp_bdi))) {
+ available_bd = available1 - 1;
+ }
+ } else {
+ chain_bd1 = available1 / bd_list->num_bds_table;
+ available_bd = available1 - chain_bd1;
+ }
+ }
+ /*
+ * we need to keep one extra bd to check if ring is full or empty so
+ * reduce by 1
+ */
+ available_bd--;
+ dev_vdbg(bdc->dev, "available_bd:%d\n", available_bd);
+
+ return available_bd;
+}
+
+/* Notify the hardware after queueing the bd to bdl */
+void bdc_notify_xfr(struct bdc *bdc, u32 epnum)
+{
+ struct bdc_ep *ep = bdc->bdc_ep_array[epnum];
+
+ dev_vdbg(bdc->dev, "%s epnum:%d\n", __func__, epnum);
+ /*
+ * We don't have anyway to check if ep state is running,
+ * except the software flags.
+ */
+ if (unlikely(ep->flags & BDC_EP_STOP))
+ ep->flags &= ~BDC_EP_STOP;
+
+ bdc_writel(bdc->regs, BDC_XSFNTF, epnum);
+}
+
+/* returns the bd corresponding to bdi */
+static struct bdc_bd *bdi_to_bd(struct bdc_ep *ep, int bdi)
+{
+ int tbi = bdi_to_tbi(ep, bdi);
+ int local_bdi = 0;
+
+ local_bdi = bdi - (tbi * ep->bd_list.num_bds_table);
+ dev_vdbg(ep->bdc->dev,
+ "%s bdi:%d local_bdi:%d\n",
+ __func__, bdi, local_bdi);
+
+ return (ep->bd_list.bd_table_array[tbi]->start_bd + local_bdi);
+}
+
+/* Advance the enqueue pointer */
+static void ep_bdlist_eqp_adv(struct bdc_ep *ep)
+{
+ ep->bd_list.eqp_bdi++;
+ /* if it's chain bd, then move to next */
+ if (((ep->bd_list.eqp_bdi + 1) % ep->bd_list.num_bds_table) == 0)
+ ep->bd_list.eqp_bdi++;
+
+ /* if the eqp is pointing to last + 1 then move back to 0 */
+ if (ep->bd_list.eqp_bdi == (ep->bd_list.max_bdi + 1))
+ ep->bd_list.eqp_bdi = 0;
+}
+
+/* Setup the first bd for ep0 transfer */
+static int setup_first_bd_ep0(struct bdc *bdc, struct bdc_req *req, u32 *dword3)
+{
+ u16 wValue;
+ u32 req_len;
+
+ req->ep->dir = 0;
+ req_len = req->usb_req.length;
+ switch (bdc->ep0_state) {
+ case WAIT_FOR_DATA_START:
+ *dword3 |= BD_TYPE_DS;
+ if (bdc->setup_pkt.bRequestType & USB_DIR_IN)
+ *dword3 |= BD_DIR_IN;
+
+ /* check if zlp will be needed */
+ wValue = le16_to_cpu(bdc->setup_pkt.wValue);
+ if ((wValue > req_len) &&
+ (req_len % bdc->gadget.ep0->maxpacket == 0)) {
+ dev_dbg(bdc->dev, "ZLP needed wVal:%d len:%d MaxP:%d\n",
+ wValue, req_len,
+ bdc->gadget.ep0->maxpacket);
+ bdc->zlp_needed = true;
+ }
+ break;
+
+ case WAIT_FOR_STATUS_START:
+ *dword3 |= BD_TYPE_SS;
+ if (!le16_to_cpu(bdc->setup_pkt.wLength) ||
+ !(bdc->setup_pkt.bRequestType & USB_DIR_IN))
+ *dword3 |= BD_DIR_IN;
+ break;
+ default:
+ dev_err(bdc->dev,
+ "Unknown ep0 state for queueing bd ep0_state:%s\n",
+ ep0_state_string[bdc->ep0_state]);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* Setup the bd dma descriptor for a given request */
+static int setup_bd_list_xfr(struct bdc *bdc, struct bdc_req *req, int num_bds)
+{
+ dma_addr_t buf_add = req->usb_req.dma;
+ u32 maxp, tfs, dword2, dword3;
+ struct bd_transfer *bd_xfr;
+ struct bd_list *bd_list;
+ struct bdc_ep *ep;
+ struct bdc_bd *bd;
+ int ret, bdnum;
+ u32 req_len;
+
+ ep = req->ep;
+ bd_list = &ep->bd_list;
+ bd_xfr = &req->bd_xfr;
+ bd_xfr->req = req;
+ bd_xfr->start_bdi = bd_list->eqp_bdi;
+ bd = bdi_to_bd(ep, bd_list->eqp_bdi);
+ req_len = req->usb_req.length;
+ maxp = usb_endpoint_maxp(ep->desc);
+ tfs = roundup(req->usb_req.length, maxp);
+ tfs = tfs/maxp;
+ dev_vdbg(bdc->dev, "%s ep:%s num_bds:%d tfs:%d r_len:%d bd:%p\n",
+ __func__, ep->name, num_bds, tfs, req_len, bd);
+
+ for (bdnum = 0; bdnum < num_bds; bdnum++) {
+ dword2 = dword3 = 0;
+ /* First bd */
+ if (!bdnum) {
+ dword3 |= BD_SOT|BD_SBF|(tfs<<BD_TFS_SHIFT);
+ dword2 |= BD_LTF;
+ /* format of first bd for ep0 is different than other */
+ if (ep->ep_num == 1) {
+ ret = setup_first_bd_ep0(bdc, req, &dword3);
+ if (ret)
+ return ret;
+ }
+ }
+ if (!req->ep->dir)
+ dword3 |= BD_ISP;
+
+ if (req_len > BD_MAX_BUFF_SIZE) {
+ dword2 |= BD_MAX_BUFF_SIZE;
+ req_len -= BD_MAX_BUFF_SIZE;
+ } else {
+ /* this should be the last bd */
+ dword2 |= req_len;
+ dword3 |= BD_IOC;
+ dword3 |= BD_EOT;
+ }
+ /* Currently only 1 INT target is supported */
+ dword2 |= BD_INTR_TARGET(0);
+ bd = bdi_to_bd(ep, ep->bd_list.eqp_bdi);
+ if (unlikely(!bd)) {
+ dev_err(bdc->dev, "Err bd pointing to wrong addr\n");
+ return -EINVAL;
+ }
+ /* write bd */
+ bd->offset[0] = cpu_to_le32(lower_32_bits(buf_add));
+ bd->offset[1] = cpu_to_le32(upper_32_bits(buf_add));
+ bd->offset[2] = cpu_to_le32(dword2);
+ bd->offset[3] = cpu_to_le32(dword3);
+ /* advance eqp pointer */
+ ep_bdlist_eqp_adv(ep);
+ /* advance the buff pointer */
+ buf_add += BD_MAX_BUFF_SIZE;
+ dev_vdbg(bdc->dev, "buf_add:%08llx req_len:%d bd:%p eqp:%d\n",
+ (unsigned long long)buf_add, req_len, bd,
+ ep->bd_list.eqp_bdi);
+ bd = bdi_to_bd(ep, ep->bd_list.eqp_bdi);
+ bd->offset[3] = cpu_to_le32(BD_SBF);
+ }
+ /* clear the STOP BD fetch bit from the first bd of this xfr */
+ bd = bdi_to_bd(ep, bd_xfr->start_bdi);
+ bd->offset[3] &= cpu_to_le32(~BD_SBF);
+ /* the new eqp will be next hw dqp */
+ bd_xfr->num_bds = num_bds;
+ bd_xfr->next_hwd_bdi = ep->bd_list.eqp_bdi;
+ /* everything is written correctly before notifying the HW */
+ wmb();
+
+ return 0;
+}
+
+/* Queue the xfr */
+static int bdc_queue_xfr(struct bdc *bdc, struct bdc_req *req)
+{
+ int num_bds, bd_available;
+ struct bdc_ep *ep;
+ int ret;
+
+ ep = req->ep;
+ dev_dbg(bdc->dev, "%s req:%p\n", __func__, req);
+ dev_dbg(bdc->dev, "eqp_bdi:%d hwd_bdi:%d\n",
+ ep->bd_list.eqp_bdi, ep->bd_list.hwd_bdi);
+
+ num_bds = bd_needed_req(req);
+ bd_available = bd_available_ep(ep);
+
+ /* how many bd's are avaialble on ep */
+ if (num_bds > bd_available)
+ return -ENOMEM;
+
+ ret = setup_bd_list_xfr(bdc, req, num_bds);
+ if (ret)
+ return ret;
+ list_add_tail(&req->queue, &ep->queue);
+ bdc_dbg_bd_list(bdc, ep);
+ bdc_notify_xfr(bdc, ep->ep_num);
+
+ return 0;
+}
+
+/* callback to gadget layer when xfr completes */
+static void bdc_req_complete(struct bdc_ep *ep, struct bdc_req *req,
+ int status)
+{
+ struct bdc *bdc = ep->bdc;
+
+ if (req == NULL)
+ return;
+
+ dev_dbg(bdc->dev, "%s ep:%s status:%d\n", __func__, ep->name, status);
+ list_del(&req->queue);
+ req->usb_req.status = status;
+ usb_gadget_unmap_request(&bdc->gadget, &req->usb_req, ep->dir);
+ if (req->usb_req.complete) {
+ spin_unlock(&bdc->lock);
+ usb_gadget_giveback_request(&ep->usb_ep, &req->usb_req);
+ spin_lock(&bdc->lock);
+ }
+}
+
+/* Disable the endpoint */
+int bdc_ep_disable(struct bdc_ep *ep)
+{
+ struct bdc_req *req;
+ struct bdc *bdc;
+ int ret;
+
+ ret = 0;
+ bdc = ep->bdc;
+ dev_dbg(bdc->dev, "%s() ep->ep_num=%d\n", __func__, ep->ep_num);
+ /* Stop the endpoint */
+ ret = bdc_stop_ep(bdc, ep->ep_num);
+
+ /*
+ * Intentionally don't check the ret value of stop, it can fail in
+ * disconnect scenarios, continue with dconfig
+ */
+ /* de-queue any pending requests */
+ while (!list_empty(&ep->queue)) {
+ req = list_entry(ep->queue.next, struct bdc_req,
+ queue);
+ bdc_req_complete(ep, req, -ESHUTDOWN);
+ }
+ /* deconfigure the endpoint */
+ ret = bdc_dconfig_ep(bdc, ep);
+ if (ret)
+ dev_warn(bdc->dev,
+ "dconfig fail but continue with memory free");
+
+ ep->flags = 0;
+ /* ep0 memory is not freed, but reused on next connect sr */
+ if (ep->ep_num == 1)
+ return 0;
+
+ /* Free the bdl memory */
+ ep_bd_list_free(ep, ep->bd_list.num_tabs);
+ ep->desc = NULL;
+ ep->comp_desc = NULL;
+ ep->usb_ep.desc = NULL;
+ ep->ep_type = 0;
+
+ return ret;
+}
+
+/* Enable the ep */
+int bdc_ep_enable(struct bdc_ep *ep)
+{
+ struct bdc *bdc;
+ int ret = 0;
+
+ bdc = ep->bdc;
+ dev_dbg(bdc->dev, "%s NUM_TABLES:%d %d\n",
+ __func__, NUM_TABLES, NUM_TABLES_ISOCH);
+
+ ret = ep_bd_list_alloc(ep);
+ if (ret) {
+ dev_err(bdc->dev, "ep bd list allocation failed:%d\n", ret);
+ return -ENOMEM;
+ }
+ bdc_dbg_bd_list(bdc, ep);
+ /* only for ep0: config ep is called for ep0 from connect event */
+ if (ep->ep_num == 1)
+ return ret;
+
+ /* Issue a configure endpoint command */
+ ret = bdc_config_ep(bdc, ep);
+ if (ret)
+ return ret;
+
+ ep->usb_ep.maxpacket = usb_endpoint_maxp(ep->desc);
+ ep->usb_ep.desc = ep->desc;
+ ep->usb_ep.comp_desc = ep->comp_desc;
+ ep->ep_type = usb_endpoint_type(ep->desc);
+ ep->flags |= BDC_EP_ENABLED;
+
+ return 0;
+}
+
+/* EP0 related code */
+
+/* Queue a status stage BD */
+static int ep0_queue_status_stage(struct bdc *bdc)
+{
+ struct bdc_req *status_req;
+ struct bdc_ep *ep;
+
+ status_req = &bdc->status_req;
+ ep = bdc->bdc_ep_array[1];
+ status_req->ep = ep;
+ status_req->usb_req.length = 0;
+ status_req->usb_req.status = -EINPROGRESS;
+ status_req->usb_req.actual = 0;
+ status_req->usb_req.complete = NULL;
+ bdc_queue_xfr(bdc, status_req);
+
+ return 0;
+}
+
+/* Queue xfr on ep0 */
+static int ep0_queue(struct bdc_ep *ep, struct bdc_req *req)
+{
+ struct bdc *bdc;
+ int ret;
+
+ bdc = ep->bdc;
+ dev_dbg(bdc->dev, "%s()\n", __func__);
+ req->usb_req.actual = 0;
+ req->usb_req.status = -EINPROGRESS;
+ req->epnum = ep->ep_num;
+
+ if (bdc->delayed_status) {
+ bdc->delayed_status = false;
+ /* if status stage was delayed? */
+ if (bdc->ep0_state == WAIT_FOR_STATUS_START) {
+ /* Queue a status stage BD */
+ ep0_queue_status_stage(bdc);
+ bdc->ep0_state = WAIT_FOR_STATUS_XMIT;
+ return 0;
+ }
+ } else {
+ /*
+ * if delayed status is false and 0 length transfer is requested
+ * i.e. for status stage of some setup request, then just
+ * return from here the status stage is queued independently
+ */
+ if (req->usb_req.length == 0)
+ return 0;
+
+ }
+ ret = usb_gadget_map_request(&bdc->gadget, &req->usb_req, ep->dir);
+ if (ret) {
+ dev_err(bdc->dev, "dma mapping failed %s\n", ep->name);
+ return ret;
+ }
+
+ return bdc_queue_xfr(bdc, req);
+}
+
+/* Queue data stage */
+static int ep0_queue_data_stage(struct bdc *bdc)
+{
+ struct bdc_ep *ep;
+
+ dev_dbg(bdc->dev, "%s\n", __func__);
+ ep = bdc->bdc_ep_array[1];
+ bdc->ep0_req.ep = ep;
+ bdc->ep0_req.usb_req.complete = NULL;
+
+ return ep0_queue(ep, &bdc->ep0_req);
+}
+
+/* Queue req on ep */
+static int ep_queue(struct bdc_ep *ep, struct bdc_req *req)
+{
+ struct bdc *bdc;
+ int ret = 0;
+
+ if (!req || !ep->usb_ep.desc)
+ return -EINVAL;
+
+ bdc = ep->bdc;
+
+ req->usb_req.actual = 0;
+ req->usb_req.status = -EINPROGRESS;
+ req->epnum = ep->ep_num;
+
+ ret = usb_gadget_map_request(&bdc->gadget, &req->usb_req, ep->dir);
+ if (ret) {
+ dev_err(bdc->dev, "dma mapping failed\n");
+ return ret;
+ }
+
+ return bdc_queue_xfr(bdc, req);
+}
+
+/* Dequeue a request from ep */
+static int ep_dequeue(struct bdc_ep *ep, struct bdc_req *req)
+{
+ int start_bdi, end_bdi, tbi, eqp_bdi, curr_hw_dqpi;
+ bool start_pending, end_pending;
+ bool first_remove = false;
+ struct bdc_req *first_req;
+ struct bdc_bd *bd_start;
+ struct bd_table *table;
+ dma_addr_t next_bd_dma;
+ u64 deq_ptr_64 = 0;
+ struct bdc *bdc;
+ u32 tmp_32;
+ int ret;
+
+ bdc = ep->bdc;
+ start_pending = end_pending = false;
+ eqp_bdi = ep->bd_list.eqp_bdi - 1;
+
+ if (eqp_bdi < 0)
+ eqp_bdi = ep->bd_list.max_bdi;
+
+ start_bdi = req->bd_xfr.start_bdi;
+ end_bdi = find_end_bdi(ep, req->bd_xfr.next_hwd_bdi);
+
+ dev_dbg(bdc->dev, "%s ep:%s start:%d end:%d\n",
+ __func__, ep->name, start_bdi, end_bdi);
+ dev_dbg(bdc->dev, "%s ep=%p ep->desc=%p\n", __func__,
+ ep, (void *)ep->usb_ep.desc);
+ /* if still connected, stop the ep to see where the HW is ? */
+ if (!(bdc_readl(bdc->regs, BDC_USPC) & BDC_PST_MASK)) {
+ ret = bdc_stop_ep(bdc, ep->ep_num);
+ /* if there is an issue, then no need to go further */
+ if (ret)
+ return 0;
+ } else
+ return 0;
+
+ /*
+ * After endpoint is stopped, there can be 3 cases, the request
+ * is processed, pending or in the middle of processing
+ */
+
+ /* The current hw dequeue pointer */
+ tmp_32 = bdc_readl(bdc->regs, BDC_EPSTS0);
+ deq_ptr_64 = tmp_32;
+ tmp_32 = bdc_readl(bdc->regs, BDC_EPSTS1);
+ deq_ptr_64 |= ((u64)tmp_32 << 32);
+
+ /* we have the dma addr of next bd that will be fetched by hardware */
+ curr_hw_dqpi = bd_add_to_bdi(ep, deq_ptr_64);
+ if (curr_hw_dqpi < 0)
+ return curr_hw_dqpi;
+
+ /*
+ * curr_hw_dqpi points to actual dqp of HW and HW owns bd's from
+ * curr_hw_dqbdi..eqp_bdi.
+ */
+
+ /* Check if start_bdi and end_bdi are in range of HW owned BD's */
+ if (curr_hw_dqpi > eqp_bdi) {
+ /* there is a wrap from last to 0 */
+ if (start_bdi >= curr_hw_dqpi || start_bdi <= eqp_bdi) {
+ start_pending = true;
+ end_pending = true;
+ } else if (end_bdi >= curr_hw_dqpi || end_bdi <= eqp_bdi) {
+ end_pending = true;
+ }
+ } else {
+ if (start_bdi >= curr_hw_dqpi) {
+ start_pending = true;
+ end_pending = true;
+ } else if (end_bdi >= curr_hw_dqpi) {
+ end_pending = true;
+ }
+ }
+ dev_dbg(bdc->dev,
+ "start_pending:%d end_pending:%d speed:%d\n",
+ start_pending, end_pending, bdc->gadget.speed);
+
+ /* If both start till end are processes, we cannot deq req */
+ if (!start_pending && !end_pending)
+ return -EINVAL;
+
+ /*
+ * if ep_dequeue is called after disconnect then just return
+ * success from here
+ */
+ if (bdc->gadget.speed == USB_SPEED_UNKNOWN)
+ return 0;
+ tbi = bdi_to_tbi(ep, req->bd_xfr.next_hwd_bdi);
+ table = ep->bd_list.bd_table_array[tbi];
+ next_bd_dma = table->dma +
+ sizeof(struct bdc_bd)*(req->bd_xfr.next_hwd_bdi -
+ tbi * ep->bd_list.num_bds_table);
+
+ first_req = list_first_entry(&ep->queue, struct bdc_req,
+ queue);
+
+ if (req == first_req)
+ first_remove = true;
+
+ /*
+ * Due to HW limitation we need to bypadd chain bd's and issue ep_bla,
+ * incase if start is pending this is the first request in the list
+ * then issue ep_bla instead of marking as chain bd
+ */
+ if (start_pending && !first_remove) {
+ /*
+ * Mark the start bd as Chain bd, and point the chain
+ * bd to next_bd_dma
+ */
+ bd_start = bdi_to_bd(ep, start_bdi);
+ bd_start->offset[0] = cpu_to_le32(lower_32_bits(next_bd_dma));
+ bd_start->offset[1] = cpu_to_le32(upper_32_bits(next_bd_dma));
+ bd_start->offset[2] = 0x0;
+ bd_start->offset[3] = cpu_to_le32(MARK_CHAIN_BD);
+ bdc_dbg_bd_list(bdc, ep);
+ } else if (end_pending) {
+ /*
+ * The transfer is stopped in the middle, move the
+ * HW deq pointer to next_bd_dma
+ */
+ ret = bdc_ep_bla(bdc, ep, next_bd_dma);
+ if (ret) {
+ dev_err(bdc->dev, "error in ep_bla:%d\n", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/* Halt/Clear the ep based on value */
+static int ep_set_halt(struct bdc_ep *ep, u32 value)
+{
+ struct bdc *bdc;
+ int ret;
+
+ bdc = ep->bdc;
+ dev_dbg(bdc->dev, "%s ep:%s value=%d\n", __func__, ep->name, value);
+
+ if (value) {
+ dev_dbg(bdc->dev, "Halt\n");
+ if (ep->ep_num == 1)
+ bdc->ep0_state = WAIT_FOR_SETUP;
+
+ ret = bdc_ep_set_stall(bdc, ep->ep_num);
+ if (ret)
+ dev_err(bdc->dev, "failed to set STALL on %s\n",
+ ep->name);
+ else
+ ep->flags |= BDC_EP_STALL;
+ } else {
+ /* Clear */
+ dev_dbg(bdc->dev, "Before Clear\n");
+ ret = bdc_ep_clear_stall(bdc, ep->ep_num);
+ if (ret)
+ dev_err(bdc->dev, "failed to clear STALL on %s\n",
+ ep->name);
+ else
+ ep->flags &= ~BDC_EP_STALL;
+ dev_dbg(bdc->dev, "After Clear\n");
+ }
+
+ return ret;
+}
+
+/* Free all the ep */
+void bdc_free_ep(struct bdc *bdc)
+{
+ struct bdc_ep *ep;
+ u8 epnum;
+
+ dev_dbg(bdc->dev, "%s\n", __func__);
+ for (epnum = 1; epnum < bdc->num_eps; epnum++) {
+ ep = bdc->bdc_ep_array[epnum];
+ if (!ep)
+ continue;
+
+ if (ep->flags & BDC_EP_ENABLED)
+ ep_bd_list_free(ep, ep->bd_list.num_tabs);
+
+ /* ep0 is not in this gadget list */
+ if (epnum != 1)
+ list_del(&ep->usb_ep.ep_list);
+
+ kfree(ep);
+ }
+}
+
+/* USB2 spec, section 7.1.20 */
+static int bdc_set_test_mode(struct bdc *bdc)
+{
+ u32 usb2_pm;
+
+ usb2_pm = bdc_readl(bdc->regs, BDC_USPPM2);
+ usb2_pm &= ~BDC_PTC_MASK;
+ dev_dbg(bdc->dev, "%s\n", __func__);
+ switch (bdc->test_mode) {
+ case USB_TEST_J:
+ case USB_TEST_K:
+ case USB_TEST_SE0_NAK:
+ case USB_TEST_PACKET:
+ case USB_TEST_FORCE_ENABLE:
+ usb2_pm |= bdc->test_mode << 28;
+ break;
+ default:
+ return -EINVAL;
+ }
+ dev_dbg(bdc->dev, "usb2_pm=%08x", usb2_pm);
+ bdc_writel(bdc->regs, BDC_USPPM2, usb2_pm);
+
+ return 0;
+}
+
+/*
+ * Helper function to handle Transfer status report with status as either
+ * success or short
+ */
+static void handle_xsr_succ_status(struct bdc *bdc, struct bdc_ep *ep,
+ struct bdc_sr *sreport)
+{
+ int short_bdi, start_bdi, end_bdi, max_len_bds, chain_bds;
+ struct bd_list *bd_list = &ep->bd_list;
+ int actual_length, length_short;
+ struct bd_transfer *bd_xfr;
+ struct bdc_bd *short_bd;
+ struct bdc_req *req;
+ u64 deq_ptr_64 = 0;
+ int status = 0;
+ int sr_status;
+ u32 tmp_32;
+
+ dev_dbg(bdc->dev, "%s ep:%p\n", __func__, ep);
+ bdc_dbg_srr(bdc, 0);
+ /* do not process thie sr if ignore flag is set */
+ if (ep->ignore_next_sr) {
+ ep->ignore_next_sr = false;
+ return;
+ }
+
+ if (unlikely(list_empty(&ep->queue))) {
+ dev_warn(bdc->dev, "xfr srr with no BD's queued\n");
+ return;
+ }
+ req = list_entry(ep->queue.next, struct bdc_req,
+ queue);
+
+ bd_xfr = &req->bd_xfr;
+ sr_status = XSF_STS(le32_to_cpu(sreport->offset[3]));
+
+ /*
+ * sr_status is short and this transfer has more than 1 bd then it needs
+ * special handling, this is only applicable for bulk and ctrl
+ */
+ if (sr_status == XSF_SHORT && bd_xfr->num_bds > 1) {
+ /*
+ * This is multi bd xfr, lets see which bd
+ * caused short transfer and how many bytes have been
+ * transferred so far.
+ */
+ tmp_32 = le32_to_cpu(sreport->offset[0]);
+ deq_ptr_64 = tmp_32;
+ tmp_32 = le32_to_cpu(sreport->offset[1]);
+ deq_ptr_64 |= ((u64)tmp_32 << 32);
+ short_bdi = bd_add_to_bdi(ep, deq_ptr_64);
+ if (unlikely(short_bdi < 0))
+ dev_warn(bdc->dev, "bd doesn't exist?\n");
+
+ start_bdi = bd_xfr->start_bdi;
+ /*
+ * We know the start_bdi and short_bdi, how many xfr
+ * bds in between
+ */
+ if (start_bdi <= short_bdi) {
+ max_len_bds = short_bdi - start_bdi;
+ if (max_len_bds <= bd_list->num_bds_table) {
+ if (!(bdi_to_tbi(ep, start_bdi) ==
+ bdi_to_tbi(ep, short_bdi)))
+ max_len_bds--;
+ } else {
+ chain_bds = max_len_bds/bd_list->num_bds_table;
+ max_len_bds -= chain_bds;
+ }
+ } else {
+ /* there is a wrap in the ring within a xfr */
+ chain_bds = (bd_list->max_bdi - start_bdi)/
+ bd_list->num_bds_table;
+ chain_bds += short_bdi/bd_list->num_bds_table;
+ max_len_bds = bd_list->max_bdi - start_bdi;
+ max_len_bds += short_bdi;
+ max_len_bds -= chain_bds;
+ }
+ /* max_len_bds is the number of full length bds */
+ end_bdi = find_end_bdi(ep, bd_xfr->next_hwd_bdi);
+ if (!(end_bdi == short_bdi))
+ ep->ignore_next_sr = true;
+
+ actual_length = max_len_bds * BD_MAX_BUFF_SIZE;
+ short_bd = bdi_to_bd(ep, short_bdi);
+ /* length queued */
+ length_short = le32_to_cpu(short_bd->offset[2]) & 0x1FFFFF;
+ /* actual length trensfered */
+ length_short -= SR_BD_LEN(le32_to_cpu(sreport->offset[2]));
+ actual_length += length_short;
+ req->usb_req.actual = actual_length;
+ } else {
+ req->usb_req.actual = req->usb_req.length -
+ SR_BD_LEN(le32_to_cpu(sreport->offset[2]));
+ dev_dbg(bdc->dev,
+ "len=%d actual=%d bd_xfr->next_hwd_bdi:%d\n",
+ req->usb_req.length, req->usb_req.actual,
+ bd_xfr->next_hwd_bdi);
+ }
+
+ /* Update the dequeue pointer */
+ ep->bd_list.hwd_bdi = bd_xfr->next_hwd_bdi;
+ if (req->usb_req.actual < req->usb_req.length) {
+ dev_dbg(bdc->dev, "short xfr on %d\n", ep->ep_num);
+ if (req->usb_req.short_not_ok)
+ status = -EREMOTEIO;
+ }
+ bdc_req_complete(ep, bd_xfr->req, status);
+}
+
+/* EP0 setup related packet handlers */
+
+/*
+ * Setup packet received, just store the packet and process on next DS or SS
+ * started SR
+ */
+void bdc_xsf_ep0_setup_recv(struct bdc *bdc, struct bdc_sr *sreport)
+{
+ struct usb_ctrlrequest *setup_pkt;
+ u32 len;
+
+ dev_dbg(bdc->dev,
+ "%s ep0_state:%s\n",
+ __func__, ep0_state_string[bdc->ep0_state]);
+ /* Store received setup packet */
+ setup_pkt = &bdc->setup_pkt;
+ memcpy(setup_pkt, &sreport->offset[0], sizeof(*setup_pkt));
+ len = le16_to_cpu(setup_pkt->wLength);
+ if (!len)
+ bdc->ep0_state = WAIT_FOR_STATUS_START;
+ else
+ bdc->ep0_state = WAIT_FOR_DATA_START;
+
+
+ dev_dbg(bdc->dev,
+ "%s exit ep0_state:%s\n",
+ __func__, ep0_state_string[bdc->ep0_state]);
+}
+
+/* Stall ep0 */
+static void ep0_stall(struct bdc *bdc)
+{
+ struct bdc_ep *ep = bdc->bdc_ep_array[1];
+ struct bdc_req *req;
+
+ dev_dbg(bdc->dev, "%s\n", __func__);
+ bdc->delayed_status = false;
+ ep_set_halt(ep, 1);
+
+ /* de-queue any pendig requests */
+ while (!list_empty(&ep->queue)) {
+ req = list_entry(ep->queue.next, struct bdc_req,
+ queue);
+ bdc_req_complete(ep, req, -ESHUTDOWN);
+ }
+}
+
+/* SET_ADD handlers */
+static int ep0_set_address(struct bdc *bdc, struct usb_ctrlrequest *ctrl)
+{
+ enum usb_device_state state = bdc->gadget.state;
+ int ret = 0;
+ u32 addr;
+
+ addr = le16_to_cpu(ctrl->wValue);
+ dev_dbg(bdc->dev,
+ "%s addr:%d dev state:%d\n",
+ __func__, addr, state);
+
+ if (addr > 127)
+ return -EINVAL;
+
+ switch (state) {
+ case USB_STATE_DEFAULT:
+ case USB_STATE_ADDRESS:
+ /* Issue Address device command */
+ ret = bdc_address_device(bdc, addr);
+ if (ret)
+ return ret;
+
+ if (addr)
+ usb_gadget_set_state(&bdc->gadget, USB_STATE_ADDRESS);
+ else
+ usb_gadget_set_state(&bdc->gadget, USB_STATE_DEFAULT);
+
+ bdc->dev_addr = addr;
+ break;
+ default:
+ dev_warn(bdc->dev,
+ "SET Address in wrong device state %d\n",
+ state);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+/* Handler for SET/CLEAR FEATURE requests for device */
+static int ep0_handle_feature_dev(struct bdc *bdc, u16 wValue,
+ u16 wIndex, bool set)
+{
+ enum usb_device_state state = bdc->gadget.state;
+ u32 usppms = 0;
+
+ dev_dbg(bdc->dev, "%s set:%d dev state:%d\n",
+ __func__, set, state);
+ switch (wValue) {
+ case USB_DEVICE_REMOTE_WAKEUP:
+ dev_dbg(bdc->dev, "USB_DEVICE_REMOTE_WAKEUP\n");
+ if (set)
+ bdc->devstatus |= REMOTE_WAKE_ENABLE;
+ else
+ bdc->devstatus &= ~REMOTE_WAKE_ENABLE;
+ break;
+
+ case USB_DEVICE_TEST_MODE:
+ dev_dbg(bdc->dev, "USB_DEVICE_TEST_MODE\n");
+ if ((wIndex & 0xFF) ||
+ (bdc->gadget.speed != USB_SPEED_HIGH) || !set)
+ return -EINVAL;
+
+ bdc->test_mode = wIndex >> 8;
+ break;
+
+ case USB_DEVICE_U1_ENABLE:
+ dev_dbg(bdc->dev, "USB_DEVICE_U1_ENABLE\n");
+
+ if (bdc->gadget.speed != USB_SPEED_SUPER ||
+ state != USB_STATE_CONFIGURED)
+ return -EINVAL;
+
+ usppms = bdc_readl(bdc->regs, BDC_USPPMS);
+ if (set) {
+ /* clear previous u1t */
+ usppms &= ~BDC_U1T(BDC_U1T_MASK);
+ usppms |= BDC_U1T(U1_TIMEOUT);
+ usppms |= BDC_U1E | BDC_PORT_W1S;
+ bdc->devstatus |= (1 << USB_DEV_STAT_U1_ENABLED);
+ } else {
+ usppms &= ~BDC_U1E;
+ usppms |= BDC_PORT_W1S;
+ bdc->devstatus &= ~(1 << USB_DEV_STAT_U1_ENABLED);
+ }
+ bdc_writel(bdc->regs, BDC_USPPMS, usppms);
+ break;
+
+ case USB_DEVICE_U2_ENABLE:
+ dev_dbg(bdc->dev, "USB_DEVICE_U2_ENABLE\n");
+
+ if (bdc->gadget.speed != USB_SPEED_SUPER ||
+ state != USB_STATE_CONFIGURED)
+ return -EINVAL;
+
+ usppms = bdc_readl(bdc->regs, BDC_USPPMS);
+ if (set) {
+ usppms |= BDC_U2E;
+ usppms |= BDC_U2A;
+ bdc->devstatus |= (1 << USB_DEV_STAT_U2_ENABLED);
+ } else {
+ usppms &= ~BDC_U2E;
+ usppms &= ~BDC_U2A;
+ bdc->devstatus &= ~(1 << USB_DEV_STAT_U2_ENABLED);
+ }
+ bdc_writel(bdc->regs, BDC_USPPMS, usppms);
+ break;
+
+ case USB_DEVICE_LTM_ENABLE:
+ dev_dbg(bdc->dev, "USB_DEVICE_LTM_ENABLE?\n");
+ if (bdc->gadget.speed != USB_SPEED_SUPER ||
+ state != USB_STATE_CONFIGURED)
+ return -EINVAL;
+ break;
+ default:
+ dev_err(bdc->dev, "Unknown wValue:%d\n", wValue);
+ return -EOPNOTSUPP;
+ } /* USB_RECIP_DEVICE end */
+
+ return 0;
+}
+
+/* SET/CLEAR FEATURE handler */
+static int ep0_handle_feature(struct bdc *bdc,
+ struct usb_ctrlrequest *setup_pkt, bool set)
+{
+ enum usb_device_state state = bdc->gadget.state;
+ struct bdc_ep *ep;
+ u16 wValue;
+ u16 wIndex;
+ int epnum;
+
+ wValue = le16_to_cpu(setup_pkt->wValue);
+ wIndex = le16_to_cpu(setup_pkt->wIndex);
+
+ dev_dbg(bdc->dev,
+ "%s wValue=%d wIndex=%d devstate=%08x speed=%d set=%d",
+ __func__, wValue, wIndex, state,
+ bdc->gadget.speed, set);
+
+ switch (setup_pkt->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ return ep0_handle_feature_dev(bdc, wValue, wIndex, set);
+ case USB_RECIP_INTERFACE:
+ dev_dbg(bdc->dev, "USB_RECIP_INTERFACE\n");
+ /* USB3 spec, sec 9.4.9 */
+ if (wValue != USB_INTRF_FUNC_SUSPEND)
+ return -EINVAL;
+ /* USB3 spec, Table 9-8 */
+ if (set) {
+ if (wIndex & USB_INTRF_FUNC_SUSPEND_RW) {
+ dev_dbg(bdc->dev, "SET REMOTE_WAKEUP\n");
+ bdc->devstatus |= REMOTE_WAKE_ENABLE;
+ } else {
+ dev_dbg(bdc->dev, "CLEAR REMOTE_WAKEUP\n");
+ bdc->devstatus &= ~REMOTE_WAKE_ENABLE;
+ }
+ }
+ break;
+
+ case USB_RECIP_ENDPOINT:
+ dev_dbg(bdc->dev, "USB_RECIP_ENDPOINT\n");
+ if (wValue != USB_ENDPOINT_HALT)
+ return -EINVAL;
+
+ epnum = wIndex & USB_ENDPOINT_NUMBER_MASK;
+ if (epnum) {
+ if ((wIndex & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
+ epnum = epnum * 2 + 1;
+ else
+ epnum *= 2;
+ } else {
+ epnum = 1; /*EP0*/
+ }
+ /*
+ * If CLEAR_FEATURE on ep0 then don't do anything as the stall
+ * condition on ep0 has already been cleared when SETUP packet
+ * was received.
+ */
+ if (epnum == 1 && !set) {
+ dev_dbg(bdc->dev, "ep0 stall already cleared\n");
+ return 0;
+ }
+ dev_dbg(bdc->dev, "epnum=%d\n", epnum);
+ ep = bdc->bdc_ep_array[epnum];
+ if (!ep)
+ return -EINVAL;
+
+ return ep_set_halt(ep, set);
+ default:
+ dev_err(bdc->dev, "Unknown recipient\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* GET_STATUS request handler */
+static int ep0_handle_status(struct bdc *bdc,
+ struct usb_ctrlrequest *setup_pkt)
+{
+ enum usb_device_state state = bdc->gadget.state;
+ struct bdc_ep *ep;
+ u16 usb_status = 0;
+ u32 epnum;
+ u16 wIndex;
+
+ /* USB2.0 spec sec 9.4.5 */
+ if (state == USB_STATE_DEFAULT)
+ return -EINVAL;
+ wIndex = le16_to_cpu(setup_pkt->wIndex);
+ dev_dbg(bdc->dev, "%s\n", __func__);
+ usb_status = bdc->devstatus;
+ switch (setup_pkt->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ dev_dbg(bdc->dev,
+ "USB_RECIP_DEVICE devstatus:%08x\n",
+ bdc->devstatus);
+ /* USB3 spec, sec 9.4.5 */
+ if (bdc->gadget.speed == USB_SPEED_SUPER)
+ usb_status &= ~REMOTE_WAKE_ENABLE;
+ break;
+
+ case USB_RECIP_INTERFACE:
+ dev_dbg(bdc->dev, "USB_RECIP_INTERFACE\n");
+ if (bdc->gadget.speed == USB_SPEED_SUPER) {
+ /*
+ * This should come from func for Func remote wkup
+ * usb_status |=1;
+ */
+ if (bdc->devstatus & REMOTE_WAKE_ENABLE)
+ usb_status |= REMOTE_WAKE_ENABLE;
+ } else {
+ usb_status = 0;
+ }
+
+ break;
+
+ case USB_RECIP_ENDPOINT:
+ dev_dbg(bdc->dev, "USB_RECIP_ENDPOINT\n");
+ epnum = wIndex & USB_ENDPOINT_NUMBER_MASK;
+ if (epnum) {
+ if ((wIndex & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
+ epnum = epnum*2 + 1;
+ else
+ epnum *= 2;
+ } else {
+ epnum = 1; /* EP0 */
+ }
+
+ ep = bdc->bdc_ep_array[epnum];
+ if (!ep) {
+ dev_err(bdc->dev, "ISSUE, GET_STATUS for invalid EP ?");
+ return -EINVAL;
+ }
+ if (ep->flags & BDC_EP_STALL)
+ usb_status |= 1 << USB_ENDPOINT_HALT;
+
+ break;
+ default:
+ dev_err(bdc->dev, "Unknown recipient for get_status\n");
+ return -EINVAL;
+ }
+ /* prepare a data stage for GET_STATUS */
+ dev_dbg(bdc->dev, "usb_status=%08x\n", usb_status);
+ *(__le16 *)bdc->ep0_response_buff = cpu_to_le16(usb_status);
+ bdc->ep0_req.usb_req.length = 2;
+ bdc->ep0_req.usb_req.buf = &bdc->ep0_response_buff;
+ ep0_queue_data_stage(bdc);
+
+ return 0;
+}
+
+static void ep0_set_sel_cmpl(struct usb_ep *_ep, struct usb_request *_req)
+{
+ /* ep0_set_sel_cmpl */
+}
+
+/* Queue data stage to handle 6 byte SET_SEL request */
+static int ep0_set_sel(struct bdc *bdc,
+ struct usb_ctrlrequest *setup_pkt)
+{
+ struct bdc_ep *ep;
+ u16 wLength;
+
+ dev_dbg(bdc->dev, "%s\n", __func__);
+ wLength = le16_to_cpu(setup_pkt->wLength);
+ if (unlikely(wLength != 6)) {
+ dev_err(bdc->dev, "%s Wrong wLength:%d\n", __func__, wLength);
+ return -EINVAL;
+ }
+ ep = bdc->bdc_ep_array[1];
+ bdc->ep0_req.ep = ep;
+ bdc->ep0_req.usb_req.length = 6;
+ bdc->ep0_req.usb_req.buf = bdc->ep0_response_buff;
+ bdc->ep0_req.usb_req.complete = ep0_set_sel_cmpl;
+ ep0_queue_data_stage(bdc);
+
+ return 0;
+}
+
+/*
+ * Queue a 0 byte bd only if wLength is more than the length and length is
+ * a multiple of MaxPacket then queue 0 byte BD
+ */
+static int ep0_queue_zlp(struct bdc *bdc)
+{
+ int ret;
+
+ dev_dbg(bdc->dev, "%s\n", __func__);
+ bdc->ep0_req.ep = bdc->bdc_ep_array[1];
+ bdc->ep0_req.usb_req.length = 0;
+ bdc->ep0_req.usb_req.complete = NULL;
+ bdc->ep0_state = WAIT_FOR_DATA_START;
+ ret = bdc_queue_xfr(bdc, &bdc->ep0_req);
+ if (ret) {
+ dev_err(bdc->dev, "err queueing zlp :%d\n", ret);
+ return ret;
+ }
+ bdc->ep0_state = WAIT_FOR_DATA_XMIT;
+
+ return 0;
+}
+
+/* Control request handler */
+static int handle_control_request(struct bdc *bdc)
+{
+ enum usb_device_state state = bdc->gadget.state;
+ struct usb_ctrlrequest *setup_pkt;
+ int delegate_setup = 0;
+ int ret = 0;
+ int config = 0;
+
+ setup_pkt = &bdc->setup_pkt;
+ dev_dbg(bdc->dev, "%s\n", __func__);
+ if ((setup_pkt->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+ switch (setup_pkt->bRequest) {
+ case USB_REQ_SET_ADDRESS:
+ dev_dbg(bdc->dev, "USB_REQ_SET_ADDRESS\n");
+ ret = ep0_set_address(bdc, setup_pkt);
+ bdc->devstatus &= DEVSTATUS_CLEAR;
+ break;
+
+ case USB_REQ_SET_CONFIGURATION:
+ dev_dbg(bdc->dev, "USB_REQ_SET_CONFIGURATION\n");
+ if (state == USB_STATE_ADDRESS) {
+ usb_gadget_set_state(&bdc->gadget,
+ USB_STATE_CONFIGURED);
+ } else if (state == USB_STATE_CONFIGURED) {
+ /*
+ * USB2 spec sec 9.4.7, if wValue is 0 then dev
+ * is moved to addressed state
+ */
+ config = le16_to_cpu(setup_pkt->wValue);
+ if (!config)
+ usb_gadget_set_state(
+ &bdc->gadget,
+ USB_STATE_ADDRESS);
+ }
+ delegate_setup = 1;
+ break;
+
+ case USB_REQ_SET_FEATURE:
+ dev_dbg(bdc->dev, "USB_REQ_SET_FEATURE\n");
+ ret = ep0_handle_feature(bdc, setup_pkt, 1);
+ break;
+
+ case USB_REQ_CLEAR_FEATURE:
+ dev_dbg(bdc->dev, "USB_REQ_CLEAR_FEATURE\n");
+ ret = ep0_handle_feature(bdc, setup_pkt, 0);
+ break;
+
+ case USB_REQ_GET_STATUS:
+ dev_dbg(bdc->dev, "USB_REQ_GET_STATUS\n");
+ ret = ep0_handle_status(bdc, setup_pkt);
+ break;
+
+ case USB_REQ_SET_SEL:
+ dev_dbg(bdc->dev, "USB_REQ_SET_SEL\n");
+ ret = ep0_set_sel(bdc, setup_pkt);
+ break;
+
+ case USB_REQ_SET_ISOCH_DELAY:
+ dev_warn(bdc->dev,
+ "USB_REQ_SET_ISOCH_DELAY not handled\n");
+ ret = 0;
+ break;
+ default:
+ delegate_setup = 1;
+ }
+ } else {
+ delegate_setup = 1;
+ }
+
+ if (delegate_setup) {
+ spin_unlock(&bdc->lock);
+ ret = bdc->gadget_driver->setup(&bdc->gadget, setup_pkt);
+ spin_lock(&bdc->lock);
+ }
+
+ return ret;
+}
+
+/* EP0: Data stage started */
+void bdc_xsf_ep0_data_start(struct bdc *bdc, struct bdc_sr *sreport)
+{
+ struct bdc_ep *ep;
+ int ret = 0;
+
+ dev_dbg(bdc->dev, "%s\n", __func__);
+ ep = bdc->bdc_ep_array[1];
+ /* If ep0 was stalled, the clear it first */
+ if (ep->flags & BDC_EP_STALL) {
+ ret = ep_set_halt(ep, 0);
+ if (ret)
+ goto err;
+ }
+ if (bdc->ep0_state != WAIT_FOR_DATA_START)
+ dev_warn(bdc->dev,
+ "Data stage not expected ep0_state:%s\n",
+ ep0_state_string[bdc->ep0_state]);
+
+ ret = handle_control_request(bdc);
+ if (ret == USB_GADGET_DELAYED_STATUS) {
+ /*
+ * The ep0 state will remain WAIT_FOR_DATA_START till
+ * we received ep_queue on ep0
+ */
+ bdc->delayed_status = true;
+ return;
+ }
+ if (!ret) {
+ bdc->ep0_state = WAIT_FOR_DATA_XMIT;
+ dev_dbg(bdc->dev,
+ "ep0_state:%s", ep0_state_string[bdc->ep0_state]);
+ return;
+ }
+err:
+ ep0_stall(bdc);
+}
+
+/* EP0: status stage started */
+void bdc_xsf_ep0_status_start(struct bdc *bdc, struct bdc_sr *sreport)
+{
+ struct usb_ctrlrequest *setup_pkt;
+ struct bdc_ep *ep;
+ int ret = 0;
+
+ dev_dbg(bdc->dev,
+ "%s ep0_state:%s",
+ __func__, ep0_state_string[bdc->ep0_state]);
+ ep = bdc->bdc_ep_array[1];
+
+ /* check if ZLP was queued? */
+ if (bdc->zlp_needed)
+ bdc->zlp_needed = false;
+
+ if (ep->flags & BDC_EP_STALL) {
+ ret = ep_set_halt(ep, 0);
+ if (ret)
+ goto err;
+ }
+
+ if ((bdc->ep0_state != WAIT_FOR_STATUS_START) &&
+ (bdc->ep0_state != WAIT_FOR_DATA_XMIT))
+ dev_err(bdc->dev,
+ "Status stage recv but ep0_state:%s\n",
+ ep0_state_string[bdc->ep0_state]);
+
+ /* check if data stage is in progress ? */
+ if (bdc->ep0_state == WAIT_FOR_DATA_XMIT) {
+ bdc->ep0_state = STATUS_PENDING;
+ /* Status stage will be queued upon Data stage transmit event */
+ dev_dbg(bdc->dev,
+ "status started but data not transmitted yet\n");
+ return;
+ }
+ setup_pkt = &bdc->setup_pkt;
+
+ /*
+ * 2 stage setup then only process the setup, for 3 stage setup the date
+ * stage is already handled
+ */
+ if (!le16_to_cpu(setup_pkt->wLength)) {
+ ret = handle_control_request(bdc);
+ if (ret == USB_GADGET_DELAYED_STATUS) {
+ bdc->delayed_status = true;
+ /* ep0_state will remain WAIT_FOR_STATUS_START */
+ return;
+ }
+ }
+ if (!ret) {
+ /* Queue a status stage BD */
+ ep0_queue_status_stage(bdc);
+ bdc->ep0_state = WAIT_FOR_STATUS_XMIT;
+ dev_dbg(bdc->dev,
+ "ep0_state:%s", ep0_state_string[bdc->ep0_state]);
+ return;
+ }
+err:
+ ep0_stall(bdc);
+}
+
+/* Helper function to update ep0 upon SR with xsf_succ or xsf_short */
+static void ep0_xsf_complete(struct bdc *bdc, struct bdc_sr *sreport)
+{
+ dev_dbg(bdc->dev, "%s\n", __func__);
+ switch (bdc->ep0_state) {
+ case WAIT_FOR_DATA_XMIT:
+ bdc->ep0_state = WAIT_FOR_STATUS_START;
+ break;
+ case WAIT_FOR_STATUS_XMIT:
+ bdc->ep0_state = WAIT_FOR_SETUP;
+ if (bdc->test_mode) {
+ int ret;
+
+ dev_dbg(bdc->dev, "test_mode:%d\n", bdc->test_mode);
+ ret = bdc_set_test_mode(bdc);
+ if (ret < 0) {
+ dev_err(bdc->dev, "Err in setting Test mode\n");
+ return;
+ }
+ bdc->test_mode = 0;
+ }
+ break;
+ case STATUS_PENDING:
+ bdc_xsf_ep0_status_start(bdc, sreport);
+ break;
+
+ default:
+ dev_err(bdc->dev,
+ "Unknown ep0_state:%s\n",
+ ep0_state_string[bdc->ep0_state]);
+
+ }
+}
+
+/* xfr completion status report handler */
+void bdc_sr_xsf(struct bdc *bdc, struct bdc_sr *sreport)
+{
+ struct bdc_ep *ep;
+ u32 sr_status;
+ u8 ep_num;
+
+ ep_num = (le32_to_cpu(sreport->offset[3])>>4) & 0x1f;
+ ep = bdc->bdc_ep_array[ep_num];
+ if (!ep || !(ep->flags & BDC_EP_ENABLED)) {
+ dev_err(bdc->dev, "xsf for ep not enabled\n");
+ return;
+ }
+ /*
+ * check if this transfer is after link went from U3->U0 due
+ * to remote wakeup
+ */
+ if (bdc->devstatus & FUNC_WAKE_ISSUED) {
+ bdc->devstatus &= ~(FUNC_WAKE_ISSUED);
+ dev_dbg(bdc->dev, "%s clearing FUNC_WAKE_ISSUED flag\n",
+ __func__);
+ }
+ sr_status = XSF_STS(le32_to_cpu(sreport->offset[3]));
+ dev_dbg_ratelimited(bdc->dev, "%s sr_status=%d ep:%s\n",
+ __func__, sr_status, ep->name);
+
+ switch (sr_status) {
+ case XSF_SUCC:
+ case XSF_SHORT:
+ handle_xsr_succ_status(bdc, ep, sreport);
+ if (ep_num == 1)
+ ep0_xsf_complete(bdc, sreport);
+ break;
+
+ case XSF_SETUP_RECV:
+ case XSF_DATA_START:
+ case XSF_STATUS_START:
+ if (ep_num != 1) {
+ dev_err(bdc->dev,
+ "ep0 related packets on non ep0 endpoint");
+ return;
+ }
+ bdc->sr_xsf_ep0[sr_status - XSF_SETUP_RECV](bdc, sreport);
+ break;
+
+ case XSF_BABB:
+ if (ep_num == 1) {
+ dev_dbg(bdc->dev, "Babble on ep0 zlp_need:%d\n",
+ bdc->zlp_needed);
+ /*
+ * If the last completed transfer had wLength >Data Len,
+ * and Len is multiple of MaxPacket,then queue ZLP
+ */
+ if (bdc->zlp_needed) {
+ /* queue 0 length bd */
+ ep0_queue_zlp(bdc);
+ return;
+ }
+ }
+ dev_warn(bdc->dev, "Babble on ep not handled\n");
+ break;
+ default:
+ dev_warn(bdc->dev, "sr status not handled:%x\n", sr_status);
+ break;
+ }
+}
+
+static int bdc_gadget_ep_queue(struct usb_ep *_ep,
+ struct usb_request *_req, gfp_t gfp_flags)
+{
+ struct bdc_req *req;
+ unsigned long flags;
+ struct bdc_ep *ep;
+ struct bdc *bdc;
+ int ret;
+
+ if (!_ep || !_ep->desc)
+ return -ESHUTDOWN;
+
+ if (!_req || !_req->complete || !_req->buf)
+ return -EINVAL;
+
+ ep = to_bdc_ep(_ep);
+ req = to_bdc_req(_req);
+ bdc = ep->bdc;
+ dev_dbg(bdc->dev, "%s ep:%p req:%p\n", __func__, ep, req);
+ dev_dbg(bdc->dev, "queuing request %p to %s length %d zero:%d\n",
+ _req, ep->name, _req->length, _req->zero);
+
+ if (!ep->usb_ep.desc) {
+ dev_warn(bdc->dev,
+ "trying to queue req %p to disabled %s\n",
+ _req, ep->name);
+ return -ESHUTDOWN;
+ }
+
+ if (_req->length > MAX_XFR_LEN) {
+ dev_warn(bdc->dev,
+ "req length > supported MAX:%d requested:%d\n",
+ MAX_XFR_LEN, _req->length);
+ return -EOPNOTSUPP;
+ }
+ spin_lock_irqsave(&bdc->lock, flags);
+ if (ep == bdc->bdc_ep_array[1])
+ ret = ep0_queue(ep, req);
+ else
+ ret = ep_queue(ep, req);
+
+ spin_unlock_irqrestore(&bdc->lock, flags);
+
+ return ret;
+}
+
+static int bdc_gadget_ep_dequeue(struct usb_ep *_ep,
+ struct usb_request *_req)
+{
+ struct bdc_req *req;
+ struct bdc_req *iter;
+ unsigned long flags;
+ struct bdc_ep *ep;
+ struct bdc *bdc;
+ int ret;
+
+ if (!_ep || !_req)
+ return -EINVAL;
+
+ ep = to_bdc_ep(_ep);
+ req = to_bdc_req(_req);
+ bdc = ep->bdc;
+ dev_dbg(bdc->dev, "%s ep:%s req:%p\n", __func__, ep->name, req);
+ bdc_dbg_bd_list(bdc, ep);
+ spin_lock_irqsave(&bdc->lock, flags);
+
+ req = NULL;
+ /* make sure it's still queued on this endpoint */
+ list_for_each_entry(iter, &ep->queue, queue) {
+ if (&iter->usb_req != _req)
+ continue;
+ req = iter;
+ break;
+ }
+ if (!req) {
+ spin_unlock_irqrestore(&bdc->lock, flags);
+ dev_err(bdc->dev, "usb_req !=req n");
+ return -EINVAL;
+ }
+ ret = ep_dequeue(ep, req);
+ if (ret) {
+ ret = -EOPNOTSUPP;
+ goto err;
+ }
+ bdc_req_complete(ep, req, -ECONNRESET);
+
+err:
+ bdc_dbg_bd_list(bdc, ep);
+ spin_unlock_irqrestore(&bdc->lock, flags);
+
+ return ret;
+}
+
+static int bdc_gadget_ep_set_halt(struct usb_ep *_ep, int value)
+{
+ unsigned long flags;
+ struct bdc_ep *ep;
+ struct bdc *bdc;
+ int ret;
+
+ ep = to_bdc_ep(_ep);
+ bdc = ep->bdc;
+ dev_dbg(bdc->dev, "%s ep:%s value=%d\n", __func__, ep->name, value);
+ spin_lock_irqsave(&bdc->lock, flags);
+ if (usb_endpoint_xfer_isoc(ep->usb_ep.desc))
+ ret = -EINVAL;
+ else if (!list_empty(&ep->queue))
+ ret = -EAGAIN;
+ else
+ ret = ep_set_halt(ep, value);
+
+ spin_unlock_irqrestore(&bdc->lock, flags);
+
+ return ret;
+}
+
+static struct usb_request *bdc_gadget_alloc_request(struct usb_ep *_ep,
+ gfp_t gfp_flags)
+{
+ struct bdc_req *req;
+ struct bdc_ep *ep;
+
+ req = kzalloc(sizeof(*req), gfp_flags);
+ if (!req)
+ return NULL;
+
+ ep = to_bdc_ep(_ep);
+ req->ep = ep;
+ req->epnum = ep->ep_num;
+ req->usb_req.dma = DMA_ADDR_INVALID;
+ dev_dbg(ep->bdc->dev, "%s ep:%s req:%p\n", __func__, ep->name, req);
+
+ return &req->usb_req;
+}
+
+static void bdc_gadget_free_request(struct usb_ep *_ep,
+ struct usb_request *_req)
+{
+ struct bdc_req *req;
+
+ req = to_bdc_req(_req);
+ kfree(req);
+}
+
+/* endpoint operations */
+
+/* configure endpoint and also allocate resources */
+static int bdc_gadget_ep_enable(struct usb_ep *_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ unsigned long flags;
+ struct bdc_ep *ep;
+ struct bdc *bdc;
+ int ret;
+
+ if (!_ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) {
+ pr_debug("%s invalid parameters\n", __func__);
+ return -EINVAL;
+ }
+
+ if (!desc->wMaxPacketSize) {
+ pr_debug("%s missing wMaxPacketSize\n", __func__);
+ return -EINVAL;
+ }
+
+ ep = to_bdc_ep(_ep);
+ bdc = ep->bdc;
+
+ /* Sanity check, upper layer will not send enable for ep0 */
+ if (ep == bdc->bdc_ep_array[1])
+ return -EINVAL;
+
+ if (!bdc->gadget_driver
+ || bdc->gadget.speed == USB_SPEED_UNKNOWN) {
+ return -ESHUTDOWN;
+ }
+
+ dev_dbg(bdc->dev, "%s Enabling %s\n", __func__, ep->name);
+ spin_lock_irqsave(&bdc->lock, flags);
+ ep->desc = desc;
+ ep->comp_desc = _ep->comp_desc;
+ ret = bdc_ep_enable(ep);
+ spin_unlock_irqrestore(&bdc->lock, flags);
+
+ return ret;
+}
+
+static int bdc_gadget_ep_disable(struct usb_ep *_ep)
+{
+ unsigned long flags;
+ struct bdc_ep *ep;
+ struct bdc *bdc;
+ int ret;
+
+ if (!_ep) {
+ pr_debug("bdc: invalid parameters\n");
+ return -EINVAL;
+ }
+ ep = to_bdc_ep(_ep);
+ bdc = ep->bdc;
+
+ /* Upper layer will not call this for ep0, but do a sanity check */
+ if (ep == bdc->bdc_ep_array[1]) {
+ dev_warn(bdc->dev, "%s called for ep0\n", __func__);
+ return -EINVAL;
+ }
+ dev_dbg(bdc->dev,
+ "%s() ep:%s ep->flags:%08x\n",
+ __func__, ep->name, ep->flags);
+
+ if (!(ep->flags & BDC_EP_ENABLED)) {
+ if (bdc->gadget.speed != USB_SPEED_UNKNOWN)
+ dev_warn(bdc->dev, "%s is already disabled\n",
+ ep->name);
+ return 0;
+ }
+ spin_lock_irqsave(&bdc->lock, flags);
+ ret = bdc_ep_disable(ep);
+ spin_unlock_irqrestore(&bdc->lock, flags);
+
+ return ret;
+}
+
+static const struct usb_ep_ops bdc_gadget_ep_ops = {
+ .enable = bdc_gadget_ep_enable,
+ .disable = bdc_gadget_ep_disable,
+ .alloc_request = bdc_gadget_alloc_request,
+ .free_request = bdc_gadget_free_request,
+ .queue = bdc_gadget_ep_queue,
+ .dequeue = bdc_gadget_ep_dequeue,
+ .set_halt = bdc_gadget_ep_set_halt
+};
+
+/* dir = 1 is IN */
+static int init_ep(struct bdc *bdc, u32 epnum, u32 dir)
+{
+ struct bdc_ep *ep;
+
+ dev_dbg(bdc->dev, "%s epnum=%d dir=%d\n", __func__, epnum, dir);
+ ep = kzalloc(sizeof(*ep), GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+
+ ep->bdc = bdc;
+ ep->dir = dir;
+
+ if (dir)
+ ep->usb_ep.caps.dir_in = true;
+ else
+ ep->usb_ep.caps.dir_out = true;
+
+ /* ep->ep_num is the index inside bdc_ep */
+ if (epnum == 1) {
+ ep->ep_num = 1;
+ bdc->bdc_ep_array[ep->ep_num] = ep;
+ snprintf(ep->name, sizeof(ep->name), "ep%d", epnum - 1);
+ usb_ep_set_maxpacket_limit(&ep->usb_ep, EP0_MAX_PKT_SIZE);
+ ep->usb_ep.caps.type_control = true;
+ ep->comp_desc = NULL;
+ bdc->gadget.ep0 = &ep->usb_ep;
+ } else {
+ if (dir)
+ ep->ep_num = epnum * 2 - 1;
+ else
+ ep->ep_num = epnum * 2 - 2;
+
+ bdc->bdc_ep_array[ep->ep_num] = ep;
+ snprintf(ep->name, sizeof(ep->name), "ep%d%s", epnum - 1,
+ dir & 1 ? "in" : "out");
+
+ usb_ep_set_maxpacket_limit(&ep->usb_ep, 1024);
+ ep->usb_ep.caps.type_iso = true;
+ ep->usb_ep.caps.type_bulk = true;
+ ep->usb_ep.caps.type_int = true;
+ ep->usb_ep.max_streams = 0;
+ list_add_tail(&ep->usb_ep.ep_list, &bdc->gadget.ep_list);
+ }
+ ep->usb_ep.ops = &bdc_gadget_ep_ops;
+ ep->usb_ep.name = ep->name;
+ ep->flags = 0;
+ ep->ignore_next_sr = false;
+ dev_dbg(bdc->dev, "ep=%p ep->usb_ep.name=%s epnum=%d ep->epnum=%d\n",
+ ep, ep->usb_ep.name, epnum, ep->ep_num);
+
+ INIT_LIST_HEAD(&ep->queue);
+
+ return 0;
+}
+
+/* Init all ep */
+int bdc_init_ep(struct bdc *bdc)
+{
+ u8 epnum;
+ int ret;
+
+ dev_dbg(bdc->dev, "%s()\n", __func__);
+ INIT_LIST_HEAD(&bdc->gadget.ep_list);
+ /* init ep0 */
+ ret = init_ep(bdc, 1, 0);
+ if (ret) {
+ dev_err(bdc->dev, "init ep ep0 fail %d\n", ret);
+ return ret;
+ }
+
+ for (epnum = 2; epnum <= bdc->num_eps / 2; epnum++) {
+ /* OUT */
+ ret = init_ep(bdc, epnum, 0);
+ if (ret) {
+ dev_err(bdc->dev,
+ "init ep failed for:%d error: %d\n",
+ epnum, ret);
+ return ret;
+ }
+
+ /* IN */
+ ret = init_ep(bdc, epnum, 1);
+ if (ret) {
+ dev_err(bdc->dev,
+ "init ep failed for:%d error: %d\n",
+ epnum, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-31 10:15:06 +0000