#include "gadget.h"
#include "io.h"
-#define DMA_ADDR_INVALID (~(dma_addr_t)0)
-
+ /**
+ * dwc3_gadget_set_test_mode - Enables USB2 Test Modes
+ * @dwc: pointer to our context structure
+ * @mode: the mode to set (J, K SE0 NAK, Force Enable)
+ *
+ * Caller should take care of locking. This function will
+ * return 0 on success or -EINVAL if wrong Test Selector
+ * is passed
+ */
+ int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode)
+ {
+ u32 reg;
+
+ reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+ reg &= ~DWC3_DCTL_TSTCTRL_MASK;
+
+ switch (mode) {
+ case TEST_J:
+ case TEST_K:
+ case TEST_SE0_NAK:
+ case TEST_PACKET:
+ case TEST_FORCE_EN:
+ reg |= mode << 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+
+ return 0;
+ }
+
+ /**
+ * dwc3_gadget_set_link_state - Sets USB Link to a particular State
+ * @dwc: pointer to our context structure
+ * @state: the state to put link into
+ *
+ * Caller should take care of locking. This function will
+ * return 0 on success or -ETIMEDOUT.
+ */
+ int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state)
+ {
+ int retries = 10000;
+ u32 reg;
+
+ reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+ reg &= ~DWC3_DCTL_ULSTCHNGREQ_MASK;
+
+ /* set requested state */
+ reg |= DWC3_DCTL_ULSTCHNGREQ(state);
+ dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+
+ /* wait for a change in DSTS */
+ while (--retries) {
+ reg = dwc3_readl(dwc->regs, DWC3_DSTS);
+
+ if (DWC3_DSTS_USBLNKST(reg) == state)
+ return 0;
+
+ udelay(5);
+ }
+
+ dev_vdbg(dwc->dev, "link state change request timed out\n");
+
+ return -ETIMEDOUT;
+ }
+
+ /**
+ * dwc3_gadget_resize_tx_fifos - reallocate fifo spaces for current use-case
+ * @dwc: pointer to our context structure
+ *
+ * This function will a best effort FIFO allocation in order
+ * to improve FIFO usage and throughput, while still allowing
+ * us to enable as many endpoints as possible.
+ *
+ * Keep in mind that this operation will be highly dependent
+ * on the configured size for RAM1 - which contains TxFifo -,
+ * the amount of endpoints enabled on coreConsultant tool, and
+ * the width of the Master Bus.
+ *
+ * In the ideal world, we would always be able to satisfy the
+ * following equation:
+ *
+ * ((512 + 2 * MDWIDTH-Bytes) + (Number of IN Endpoints - 1) * \
+ * (3 * (1024 + MDWIDTH-Bytes) + MDWIDTH-Bytes)) / MDWIDTH-Bytes
+ *
+ * Unfortunately, due to many variables that's not always the case.
+ */
+ int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc)
+ {
+ int last_fifo_depth = 0;
+ int ram1_depth;
+ int fifo_size;
+ int mdwidth;
+ int num;
+
+ if (!dwc->needs_fifo_resize)
+ return 0;
+
+ ram1_depth = DWC3_RAM1_DEPTH(dwc->hwparams.hwparams7);
+ mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0);
+
+ /* MDWIDTH is represented in bits, we need it in bytes */
+ mdwidth >>= 3;
+
+ /*
+ * FIXME For now we will only allocate 1 wMaxPacketSize space
+ * for each enabled endpoint, later patches will come to
+ * improve this algorithm so that we better use the internal
+ * FIFO space
+ */
+ for (num = 0; num < DWC3_ENDPOINTS_NUM; num++) {
+ struct dwc3_ep *dep = dwc->eps[num];
+ int fifo_number = dep->number >> 1;
+ int mult = 1;
+ int tmp;
+
+ if (!(dep->number & 1))
+ continue;
+
+ if (!(dep->flags & DWC3_EP_ENABLED))
+ continue;
+
+ if (usb_endpoint_xfer_bulk(dep->desc)
+ || usb_endpoint_xfer_isoc(dep->desc))
+ mult = 3;
+
+ /*
+ * REVISIT: the following assumes we will always have enough
+ * space available on the FIFO RAM for all possible use cases.
+ * Make sure that's true somehow and change FIFO allocation
+ * accordingly.
+ *
+ * If we have Bulk or Isochronous endpoints, we want
+ * them to be able to be very, very fast. So we're giving
+ * those endpoints a fifo_size which is enough for 3 full
+ * packets
+ */
+ tmp = mult * (dep->endpoint.maxpacket + mdwidth);
+ tmp += mdwidth;
+
+ fifo_size = DIV_ROUND_UP(tmp, mdwidth);
+
+ fifo_size |= (last_fifo_depth << 16);
+
+ dev_vdbg(dwc->dev, "%s: Fifo Addr %04x Size %d\n",
+ dep->name, last_fifo_depth, fifo_size & 0xffff);
+
+ dwc3_writel(dwc->regs, DWC3_GTXFIFOSIZ(fifo_number),
+ fifo_size);
+
+ last_fifo_depth += (fifo_size & 0xffff);
+ }
+
+ return 0;
+ }
+
-void dwc3_map_buffer_to_dma(struct dwc3_request *req)
-{
- struct dwc3 *dwc = req->dep->dwc;
-
- if (req->request.length == 0) {
- /* req->request.dma = dwc->setup_buf_addr; */
- return;
- }
-
- if (req->request.num_sgs) {
- int mapped;
-
- mapped = dma_map_sg(dwc->dev, req->request.sg,
- req->request.num_sgs,
- req->direction ? DMA_TO_DEVICE
- : DMA_FROM_DEVICE);
- if (mapped < 0) {
- dev_err(dwc->dev, "failed to map SGs\n");
- return;
- }
-
- req->request.num_mapped_sgs = mapped;
- return;
- }
-
- if (req->request.dma == DMA_ADDR_INVALID) {
- req->request.dma = dma_map_single(dwc->dev, req->request.buf,
- req->request.length, req->direction
- ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- req->mapped = true;
- }
-}
-
-void dwc3_unmap_buffer_from_dma(struct dwc3_request *req)
-{
- struct dwc3 *dwc = req->dep->dwc;
-
- if (req->request.length == 0) {
- req->request.dma = DMA_ADDR_INVALID;
- return;
- }
-
- if (req->request.num_mapped_sgs) {
- req->request.dma = DMA_ADDR_INVALID;
- dma_unmap_sg(dwc->dev, req->request.sg,
- req->request.num_mapped_sgs,
- req->direction ? DMA_TO_DEVICE
- : DMA_FROM_DEVICE);
-
- req->request.num_mapped_sgs = 0;
- return;
- }
-
- if (req->mapped) {
- dma_unmap_single(dwc->dev, req->request.dma,
- req->request.length, req->direction
- ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- req->mapped = 0;
- req->request.dma = DMA_ADDR_INVALID;
- }
-}
-
void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
int status)
{
/*
* FIXME we need to iterate over the list of requests
* here and stop, unmap, free and del each of the linked
- * requests instead of we do now.
+ * requests instead of what we do now.
*/
- dwc3_unmap_buffer_from_dma(req);
+ usb_gadget_unmap_request(&dwc->gadget, &req->request,
+ req->direction);
list_del(&req->list);
return ret;
}
* particular token from the Host side.
*
* This will also avoid Host cancelling URBs due to too
- * many NACKs.
+ * many NAKs.
*/
- dwc3_map_buffer_to_dma(req);
+ ret = usb_gadget_map_request(&dwc->gadget, &req->request,
+ dep->direction);
+ if (ret)
+ return ret;
+
list_add_tail(&req->list, &dep->request_list);
/*
projects / platform / kernel / linux-rpi.git / commitdiff