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path: root/drivers/usb/gadget
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Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r--drivers/usb/gadget/ci_udc.c135
-rw-r--r--drivers/usb/gadget/ci_udc.h1
2 files changed, 117 insertions, 19 deletions
diff --git a/drivers/usb/gadget/ci_udc.c b/drivers/usb/gadget/ci_udc.c
index 22d288c711..aadff42a9c 100644
--- a/drivers/usb/gadget/ci_udc.c
+++ b/drivers/usb/gadget/ci_udc.c
@@ -50,6 +50,8 @@
/* For each endpoint, we need 2 QTDs, one for each of IN and OUT */
#define ILIST_SZ (NUM_ENDPOINTS * 2 * ILIST_ENT_SZ)
+#define EP_MAX_LENGTH_TRANSFER 0x4000
+
#ifndef DEBUG
#define DBG(x...) do {} while (0)
#else
@@ -102,13 +104,28 @@ static struct usb_ep_ops ci_ep_ops = {
};
/* Init values for USB endpoints. */
-static const struct usb_ep ci_ep_init[2] = {
+static const struct usb_ep ci_ep_init[5] = {
[0] = { /* EP 0 */
.maxpacket = 64,
.name = "ep0",
.ops = &ci_ep_ops,
},
- [1] = { /* EP 1..n */
+ [1] = {
+ .maxpacket = 512,
+ .name = "ep1in-bulk",
+ .ops = &ci_ep_ops,
+ },
+ [2] = {
+ .maxpacket = 512,
+ .name = "ep2out-bulk",
+ .ops = &ci_ep_ops,
+ },
+ [3] = {
+ .maxpacket = 512,
+ .name = "ep3in-int",
+ .ops = &ci_ep_ops,
+ },
+ [4] = {
.maxpacket = 512,
.name = "ep-",
.ops = &ci_ep_ops,
@@ -197,6 +214,19 @@ static void ci_flush_qtd(int ep_num)
}
/**
+ * ci_flush_td - flush cache over queue item
+ * @td: td pointer
+ *
+ * This function flushes cache for particular transfer descriptor.
+ */
+static void ci_flush_td(struct ept_queue_item *td)
+{
+ const uint32_t start = (uint32_t)td;
+ const uint32_t end = (uint32_t) td + ILIST_ENT_SZ;
+ flush_dcache_range(start, end);
+}
+
+/**
* ci_invalidate_qtd - invalidate cache over queue item
* @ep_num: Endpoint number
*
@@ -211,6 +241,19 @@ static void ci_invalidate_qtd(int ep_num)
invalidate_dcache_range(start, end);
}
+/**
+ * ci_invalidate_td - invalidate cache over queue item
+ * @td: td pointer
+ *
+ * This function invalidates cache for particular transfer descriptor.
+ */
+static void ci_invalidate_td(struct ept_queue_item *td)
+{
+ const uint32_t start = (uint32_t)td;
+ const uint32_t end = start + ILIST_ENT_SZ;
+ invalidate_dcache_range(start, end);
+}
+
static struct usb_request *
ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags)
{
@@ -376,6 +419,9 @@ static void ci_ep_submit_next_request(struct ci_ep *ci_ep)
struct ept_queue_head *head;
int bit, num, len, in;
struct ci_req *ci_req;
+ u8 *buf;
+ uint32_t length, actlen;
+ struct ept_queue_item *dtd, *qtd;
ci_ep->req_primed = true;
@@ -387,16 +433,41 @@ static void ci_ep_submit_next_request(struct ci_ep *ci_ep)
ci_req = list_first_entry(&ci_ep->queue, struct ci_req, queue);
len = ci_req->req.length;
- item->info = INFO_BYTES(len) | INFO_ACTIVE;
- item->page0 = (unsigned long)ci_req->hw_buf;
- item->page1 = ((unsigned long)ci_req->hw_buf & 0xfffff000) + 0x1000;
- item->page2 = ((unsigned long)ci_req->hw_buf & 0xfffff000) + 0x2000;
- item->page3 = ((unsigned long)ci_req->hw_buf & 0xfffff000) + 0x3000;
- item->page4 = ((unsigned long)ci_req->hw_buf & 0xfffff000) + 0x4000;
-
head->next = (unsigned long)item;
head->info = 0;
+ ci_req->dtd_count = 0;
+ buf = ci_req->hw_buf;
+ actlen = 0;
+ dtd = item;
+
+ do {
+ length = min(ci_req->req.length - actlen,
+ (unsigned)EP_MAX_LENGTH_TRANSFER);
+
+ dtd->info = INFO_BYTES(length) | INFO_ACTIVE;
+ dtd->page0 = (unsigned long)buf;
+ dtd->page1 = ((unsigned long)buf & 0xfffff000) + 0x1000;
+ dtd->page2 = ((unsigned long)buf & 0xfffff000) + 0x2000;
+ dtd->page3 = ((unsigned long)buf & 0xfffff000) + 0x3000;
+ dtd->page4 = ((unsigned long)buf & 0xfffff000) + 0x4000;
+
+ len -= length;
+ actlen += length;
+ buf += length;
+
+ if (len) {
+ qtd = (struct ept_queue_item *)
+ memalign(ILIST_ALIGN, ILIST_ENT_SZ);
+ dtd->next = (uint32_t)qtd;
+ dtd = qtd;
+ memset(dtd, 0, ILIST_ENT_SZ);
+ }
+
+ ci_req->dtd_count++;
+ } while (len);
+
+ item = dtd;
/*
* When sending the data for an IN transaction, the attached host
* knows that all data for the IN is sent when one of the following
@@ -432,6 +503,12 @@ static void ci_ep_submit_next_request(struct ci_ep *ci_ep)
ci_flush_qtd(num);
+ item = (struct ept_queue_item *)head->next;
+ while (item->next != TERMINATE) {
+ ci_flush_td((struct ept_queue_item *)item->next);
+ item = (struct ept_queue_item *)item->next;
+ }
+
DBG("ept%d %s queue len %x, req %p, buffer %p\n",
num, in ? "in" : "out", len, ci_req, ci_req->hw_buf);
ci_flush_qh(num);
@@ -497,21 +574,31 @@ static void flip_ep0_direction(void)
static void handle_ep_complete(struct ci_ep *ci_ep)
{
- struct ept_queue_item *item;
- int num, in, len;
+ struct ept_queue_item *item, *next_td;
+ int num, in, len, j;
struct ci_req *ci_req;
num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
in = (ci_ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
item = ci_get_qtd(num, in);
ci_invalidate_qtd(num);
+ ci_req = list_first_entry(&ci_ep->queue, struct ci_req, queue);
- len = (item->info >> 16) & 0x7fff;
- if (item->info & 0xff)
- printf("EP%d/%s FAIL info=%x pg0=%x\n",
- num, in ? "in" : "out", item->info, item->page0);
+ next_td = item;
+ len = 0;
+ for (j = 0; j < ci_req->dtd_count; j++) {
+ ci_invalidate_td(next_td);
+ item = next_td;
+ len += (item->info >> 16) & 0x7fff;
+ if (item->info & 0xff)
+ printf("EP%d/%s FAIL info=%x pg0=%x\n",
+ num, in ? "in" : "out", item->info, item->page0);
+ if (j != ci_req->dtd_count - 1)
+ next_td = (struct ept_queue_item *)item->next;
+ if (j != 0)
+ free(item);
+ }
- ci_req = list_first_entry(&ci_ep->queue, struct ci_req, queue);
list_del_init(&ci_req->queue);
ci_ep->req_primed = false;
@@ -852,9 +939,19 @@ static int ci_udc_probe(void)
controller.gadget.ep0 = &controller.ep[0].ep;
INIT_LIST_HEAD(&controller.gadget.ep0->ep_list);
- /* Init EP 1..n */
- for (i = 1; i < NUM_ENDPOINTS; i++) {
- memcpy(&controller.ep[i].ep, &ci_ep_init[1],
+ /* Init EP 1..3 */
+ for (i = 1; i < 4; i++) {
+ memcpy(&controller.ep[i].ep, &ci_ep_init[i],
+ sizeof(*ci_ep_init));
+ INIT_LIST_HEAD(&controller.ep[i].queue);
+ controller.ep[i].req_primed = false;
+ list_add_tail(&controller.ep[i].ep.ep_list,
+ &controller.gadget.ep_list);
+ }
+
+ /* Init EP 4..n */
+ for (i = 4; i < NUM_ENDPOINTS; i++) {
+ memcpy(&controller.ep[i].ep, &ci_ep_init[4],
sizeof(*ci_ep_init));
INIT_LIST_HEAD(&controller.ep[i].queue);
controller.ep[i].req_primed = false;
diff --git a/drivers/usb/gadget/ci_udc.h b/drivers/usb/gadget/ci_udc.h
index 346164a641..95cc07992b 100644
--- a/drivers/usb/gadget/ci_udc.h
+++ b/drivers/usb/gadget/ci_udc.h
@@ -86,6 +86,7 @@ struct ci_req {
/* Buffer for the current transfer. Either req.buf/len or b_buf/len */
uint8_t *hw_buf;
uint32_t hw_len;
+ uint32_t dtd_count;
};
struct ci_ep {
generated by cgit (git 2.34.1) at 2024-12-26 15:05:27 +0000