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path: root/drivers/usb/cdns3/cdns3-gadget.c
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Diffstat (limited to 'drivers/usb/cdns3/cdns3-gadget.c')
-rw-r--r--drivers/usb/cdns3/cdns3-gadget.c73
1 files changed, 44 insertions, 29 deletions
diff --git a/drivers/usb/cdns3/cdns3-gadget.c b/drivers/usb/cdns3/cdns3-gadget.c
index 582bfeceedb4..9b1bd417cec0 100644
--- a/drivers/usb/cdns3/cdns3-gadget.c
+++ b/drivers/usb/cdns3/cdns3-gadget.c
@@ -59,6 +59,7 @@
#include <linux/dma-mapping.h>
#include <linux/usb/gadget.h>
#include <linux/module.h>
+#include <linux/dmapool.h>
#include <linux/iopoll.h>
#include "core.h"
@@ -190,29 +191,13 @@ dma_addr_t cdns3_trb_virt_to_dma(struct cdns3_endpoint *priv_ep,
return priv_ep->trb_pool_dma + offset;
}
-static int cdns3_ring_size(struct cdns3_endpoint *priv_ep)
-{
- switch (priv_ep->type) {
- case USB_ENDPOINT_XFER_ISOC:
- return TRB_ISO_RING_SIZE;
- case USB_ENDPOINT_XFER_CONTROL:
- return TRB_CTRL_RING_SIZE;
- default:
- if (priv_ep->use_streams)
- return TRB_STREAM_RING_SIZE;
- else
- return TRB_RING_SIZE;
- }
-}
-
static void cdns3_free_trb_pool(struct cdns3_endpoint *priv_ep)
{
struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
if (priv_ep->trb_pool) {
- dma_free_coherent(priv_dev->sysdev,
- cdns3_ring_size(priv_ep),
- priv_ep->trb_pool, priv_ep->trb_pool_dma);
+ dma_pool_free(priv_dev->eps_dma_pool,
+ priv_ep->trb_pool, priv_ep->trb_pool_dma);
priv_ep->trb_pool = NULL;
}
}
@@ -226,7 +211,7 @@ static void cdns3_free_trb_pool(struct cdns3_endpoint *priv_ep)
int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep)
{
struct cdns3_device *priv_dev = priv_ep->cdns3_dev;
- int ring_size = cdns3_ring_size(priv_ep);
+ int ring_size = TRB_RING_SIZE;
int num_trbs = ring_size / TRB_SIZE;
struct cdns3_trb *link_trb;
@@ -234,10 +219,10 @@ int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep)
cdns3_free_trb_pool(priv_ep);
if (!priv_ep->trb_pool) {
- priv_ep->trb_pool = dma_alloc_coherent(priv_dev->sysdev,
- ring_size,
- &priv_ep->trb_pool_dma,
- GFP_DMA32 | GFP_ATOMIC);
+ priv_ep->trb_pool = dma_pool_alloc(priv_dev->eps_dma_pool,
+ GFP_DMA32 | GFP_ATOMIC,
+ &priv_ep->trb_pool_dma);
+
if (!priv_ep->trb_pool)
return -ENOMEM;
@@ -834,9 +819,15 @@ void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep,
priv_ep->dir);
if ((priv_req->flags & REQUEST_UNALIGNED) &&
- priv_ep->dir == USB_DIR_OUT && !request->status)
+ priv_ep->dir == USB_DIR_OUT && !request->status) {
+ /* Make DMA buffer CPU accessible */
+ dma_sync_single_for_cpu(priv_dev->sysdev,
+ priv_req->aligned_buf->dma,
+ priv_req->aligned_buf->size,
+ priv_req->aligned_buf->dir);
memcpy(request->buf, priv_req->aligned_buf->buf,
request->length);
+ }
priv_req->flags &= ~(REQUEST_PENDING | REQUEST_UNALIGNED);
/* All TRBs have finished, clear the counter */
@@ -898,8 +889,8 @@ static void cdns3_free_aligned_request_buf(struct work_struct *work)
* interrupts.
*/
spin_unlock_irqrestore(&priv_dev->lock, flags);
- dma_free_coherent(priv_dev->sysdev, buf->size,
- buf->buf, buf->dma);
+ dma_free_noncoherent(priv_dev->sysdev, buf->size,
+ buf->buf, buf->dma, buf->dir);
kfree(buf);
spin_lock_irqsave(&priv_dev->lock, flags);
}
@@ -926,10 +917,13 @@ static int cdns3_prepare_aligned_request_buf(struct cdns3_request *priv_req)
return -ENOMEM;
buf->size = priv_req->request.length;
+ buf->dir = usb_endpoint_dir_in(priv_ep->endpoint.desc) ?
+ DMA_TO_DEVICE : DMA_FROM_DEVICE;
- buf->buf = dma_alloc_coherent(priv_dev->sysdev,
+ buf->buf = dma_alloc_noncoherent(priv_dev->sysdev,
buf->size,
&buf->dma,
+ buf->dir,
GFP_ATOMIC);
if (!buf->buf) {
kfree(buf);
@@ -951,10 +945,17 @@ static int cdns3_prepare_aligned_request_buf(struct cdns3_request *priv_req)
}
if (priv_ep->dir == USB_DIR_IN) {
+ /* Make DMA buffer CPU accessible */
+ dma_sync_single_for_cpu(priv_dev->sysdev,
+ buf->dma, buf->size, buf->dir);
memcpy(buf->buf, priv_req->request.buf,
priv_req->request.length);
}
+ /* Transfer DMA buffer ownership back to device */
+ dma_sync_single_for_device(priv_dev->sysdev,
+ buf->dma, buf->size, buf->dir);
+
priv_req->flags |= REQUEST_UNALIGNED;
trace_cdns3_prepare_aligned_request(priv_req);
@@ -3103,9 +3104,10 @@ static void cdns3_gadget_exit(struct cdns *cdns)
struct cdns3_aligned_buf *buf;
buf = cdns3_next_align_buf(&priv_dev->aligned_buf_list);
- dma_free_coherent(priv_dev->sysdev, buf->size,
+ dma_free_noncoherent(priv_dev->sysdev, buf->size,
buf->buf,
- buf->dma);
+ buf->dma,
+ buf->dir);
list_del(&buf->list);
kfree(buf);
@@ -3113,6 +3115,7 @@ static void cdns3_gadget_exit(struct cdns *cdns)
dma_free_coherent(priv_dev->sysdev, 8, priv_dev->setup_buf,
priv_dev->setup_dma);
+ dma_pool_destroy(priv_dev->eps_dma_pool);
kfree(priv_dev->zlp_buf);
usb_put_gadget(&priv_dev->gadget);
@@ -3185,6 +3188,14 @@ static int cdns3_gadget_start(struct cdns *cdns)
/* initialize endpoint container */
INIT_LIST_HEAD(&priv_dev->gadget.ep_list);
INIT_LIST_HEAD(&priv_dev->aligned_buf_list);
+ priv_dev->eps_dma_pool = dma_pool_create("cdns3_eps_dma_pool",
+ priv_dev->sysdev,
+ TRB_RING_SIZE, 8, 0);
+ if (!priv_dev->eps_dma_pool) {
+ dev_err(priv_dev->dev, "Failed to create TRB dma pool\n");
+ ret = -ENOMEM;
+ goto err1;
+ }
ret = cdns3_init_eps(priv_dev);
if (ret) {
@@ -3235,6 +3246,8 @@ err3:
err2:
cdns3_free_all_eps(priv_dev);
err1:
+ dma_pool_destroy(priv_dev->eps_dma_pool);
+
usb_put_gadget(&priv_dev->gadget);
cdns->gadget_dev = NULL;
return ret;
@@ -3304,6 +3317,8 @@ static int cdns3_gadget_resume(struct cdns *cdns, bool hibernated)
return 0;
cdns3_gadget_config(priv_dev);
+ if (hibernated)
+ writel(USB_CONF_DEVEN, &priv_dev->regs->usb_conf);
return 0;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-10-09 00:40:35 +0300