uint8_t *aligned_buffer;
uint8_t *status_buffer;
#endif
- int bulk_data_toggle[MAX_DEVICE][MAX_ENDPOINT];
+ u8 in_data_toggle[MAX_DEVICE][MAX_ENDPOINT];
+ u8 out_data_toggle[MAX_DEVICE][MAX_ENDPOINT];
struct dwc2_core_regs *regs;
int root_hub_devnum;
};
if (dev->speed == USB_SPEED_LOW)
hcchar |= DWC2_HCCHAR_LSPDDEV;
- /* Clear old interrupt conditions for this host channel. */
- writel(0x3fff, &hc_regs->hcint);
-
/*
* Program the HCCHARn register with the endpoint characteristics
* for the current transfer.
*/
writel(hcchar, &hc_regs->hcchar);
- /* Program the HCSPLIT register for SPLITs */
+ /* Program the HCSPLIT register, default to no SPLIT */
writel(0, &hc_regs->hcsplt);
}
+static void dwc_otg_hc_init_split(struct dwc2_hc_regs *hc_regs,
+ uint8_t hub_devnum, uint8_t hub_port)
+{
+ uint32_t hcsplt = 0;
+
+ hcsplt = DWC2_HCSPLT_SPLTENA;
+ hcsplt |= hub_devnum << DWC2_HCSPLT_HUBADDR_OFFSET;
+ hcsplt |= hub_port << DWC2_HCSPLT_PRTADDR_OFFSET;
+
+ /* Program the HCSPLIT register for SPLITs */
+ writel(hcsplt, &hc_regs->hcsplt);
+}
+
/*
* DWC2 to USB API interface
*/
return stat;
}
-int wait_for_chhltd(struct dwc2_core_regs *regs, uint32_t *sub, int *toggle,
- bool ignore_ack)
+int wait_for_chhltd(struct dwc2_hc_regs *hc_regs, uint32_t *sub, u8 *toggle)
{
- uint32_t hcint_comp_hlt_ack = DWC2_HCINT_XFERCOMP | DWC2_HCINT_CHHLTD;
- struct dwc2_hc_regs *hc_regs = ®s->hc_regs[DWC2_HC_CHANNEL];
int ret;
uint32_t hcint, hctsiz;
return ret;
hcint = readl(&hc_regs->hcint);
- if (hcint & (DWC2_HCINT_NAK | DWC2_HCINT_FRMOVRUN))
- return -EAGAIN;
- if (ignore_ack)
- hcint &= ~DWC2_HCINT_ACK;
- else
- hcint_comp_hlt_ack |= DWC2_HCINT_ACK;
- if (hcint != hcint_comp_hlt_ack) {
- debug("%s: Error (HCINT=%08x)\n", __func__, hcint);
- return -EINVAL;
- }
-
hctsiz = readl(&hc_regs->hctsiz);
*sub = (hctsiz & DWC2_HCTSIZ_XFERSIZE_MASK) >>
DWC2_HCTSIZ_XFERSIZE_OFFSET;
*toggle = (hctsiz & DWC2_HCTSIZ_PID_MASK) >> DWC2_HCTSIZ_PID_OFFSET;
- debug("%s: sub=%u toggle=%d\n", __func__, *sub, *toggle);
+ debug("%s: HCINT=%08x sub=%u toggle=%d\n", __func__, hcint, *sub,
+ *toggle);
- return 0;
+ if (hcint & DWC2_HCINT_XFERCOMP)
+ return 0;
+
+ if (hcint & (DWC2_HCINT_NAK | DWC2_HCINT_FRMOVRUN))
+ return -EAGAIN;
+
+ debug("%s: Error (HCINT=%08x)\n", __func__, hcint);
+ return -EINVAL;
}
static int dwc2_eptype[] = {
DWC2_HCCHAR_EPTYPE_BULK,
};
+static int transfer_chunk(struct dwc2_hc_regs *hc_regs, void *aligned_buffer,
+ u8 *pid, int in, void *buffer, int num_packets,
+ int xfer_len, int *actual_len, int odd_frame)
+{
+ int ret = 0;
+ uint32_t sub;
+
+ debug("%s: chunk: pid %d xfer_len %u pkts %u\n", __func__,
+ *pid, xfer_len, num_packets);
+
+ writel((xfer_len << DWC2_HCTSIZ_XFERSIZE_OFFSET) |
+ (num_packets << DWC2_HCTSIZ_PKTCNT_OFFSET) |
+ (*pid << DWC2_HCTSIZ_PID_OFFSET),
+ &hc_regs->hctsiz);
+
+ if (!in && xfer_len) {
+ memcpy(aligned_buffer, buffer, xfer_len);
+
+ flush_dcache_range((unsigned long)aligned_buffer,
+ (unsigned long)aligned_buffer +
+ roundup(xfer_len, ARCH_DMA_MINALIGN));
+ }
+
+ writel(phys_to_bus((unsigned long)aligned_buffer), &hc_regs->hcdma);
+
+ /* Clear old interrupt conditions for this host channel. */
+ writel(0x3fff, &hc_regs->hcint);
+
+ /* Set host channel enable after all other setup is complete. */
+ clrsetbits_le32(&hc_regs->hcchar, DWC2_HCCHAR_MULTICNT_MASK |
+ DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS |
+ DWC2_HCCHAR_ODDFRM,
+ (1 << DWC2_HCCHAR_MULTICNT_OFFSET) |
+ (odd_frame << DWC2_HCCHAR_ODDFRM_OFFSET) |
+ DWC2_HCCHAR_CHEN);
+
+ ret = wait_for_chhltd(hc_regs, &sub, pid);
+ if (ret < 0)
+ return ret;
+
+ if (in) {
+ xfer_len -= sub;
+
+ invalidate_dcache_range((unsigned long)aligned_buffer,
+ (unsigned long)aligned_buffer +
+ roundup(xfer_len, ARCH_DMA_MINALIGN));
+
+ memcpy(buffer, aligned_buffer, xfer_len);
+ }
+ *actual_len = xfer_len;
+
+ return ret;
+}
+
int chunk_msg(struct dwc2_priv *priv, struct usb_device *dev,
- unsigned long pipe, int *pid, int in, void *buffer, int len,
- bool ignore_ack)
+ unsigned long pipe, u8 *pid, int in, void *buffer, int len)
{
struct dwc2_core_regs *regs = priv->regs;
struct dwc2_hc_regs *hc_regs = ®s->hc_regs[DWC2_HC_CHANNEL];
+ struct dwc2_host_regs *host_regs = ®s->host_regs;
int devnum = usb_pipedevice(pipe);
int ep = usb_pipeendpoint(pipe);
int max = usb_maxpacket(dev, pipe);
int eptype = dwc2_eptype[usb_pipetype(pipe)];
int done = 0;
int ret = 0;
- uint32_t sub;
+ int do_split = 0;
+ int complete_split = 0;
uint32_t xfer_len;
uint32_t num_packets;
int stop_transfer = 0;
+ uint32_t max_xfer_len;
+ int ssplit_frame_num = 0;
debug("%s: msg: pipe %lx pid %d in %d len %d\n", __func__, pipe, *pid,
in, len);
- do {
- /* Initialize channel */
- dwc_otg_hc_init(regs, DWC2_HC_CHANNEL, dev, devnum, ep, in,
- eptype, max);
+ max_xfer_len = CONFIG_DWC2_MAX_PACKET_COUNT * max;
+ if (max_xfer_len > CONFIG_DWC2_MAX_TRANSFER_SIZE)
+ max_xfer_len = CONFIG_DWC2_MAX_TRANSFER_SIZE;
+ if (max_xfer_len > DWC2_DATA_BUF_SIZE)
+ max_xfer_len = DWC2_DATA_BUF_SIZE;
+
+ /* Make sure that max_xfer_len is a multiple of max packet size. */
+ num_packets = max_xfer_len / max;
+ max_xfer_len = num_packets * max;
+
+ /* Initialize channel */
+ dwc_otg_hc_init(regs, DWC2_HC_CHANNEL, dev, devnum, ep, in,
+ eptype, max);
+
+ /* Check if the target is a FS/LS device behind a HS hub */
+ if (dev->speed != USB_SPEED_HIGH) {
+ uint8_t hub_addr;
+ uint8_t hub_port;
+ uint32_t hprt0 = readl(®s->hprt0);
+ if ((hprt0 & DWC2_HPRT0_PRTSPD_MASK) ==
+ DWC2_HPRT0_PRTSPD_HIGH) {
+ usb_find_usb2_hub_address_port(dev, &hub_addr,
+ &hub_port);
+ dwc_otg_hc_init_split(hc_regs, hub_addr, hub_port);
+
+ do_split = 1;
+ num_packets = 1;
+ max_xfer_len = max;
+ }
+ }
+ do {
+ int actual_len = 0;
+ uint32_t hcint;
+ int odd_frame = 0;
xfer_len = len - done;
- if (xfer_len > CONFIG_DWC2_MAX_TRANSFER_SIZE)
- xfer_len = CONFIG_DWC2_MAX_TRANSFER_SIZE - max + 1;
- if (xfer_len > DWC2_DATA_BUF_SIZE)
- xfer_len = DWC2_DATA_BUF_SIZE - max + 1;
- /* Make sure that xfer_len is a multiple of max packet size. */
- if (xfer_len > 0) {
+ if (xfer_len > max_xfer_len)
+ xfer_len = max_xfer_len;
+ else if (xfer_len > max)
num_packets = (xfer_len + max - 1) / max;
- if (num_packets > CONFIG_DWC2_MAX_PACKET_COUNT) {
- num_packets = CONFIG_DWC2_MAX_PACKET_COUNT;
- xfer_len = num_packets * max;
- }
- } else {
+ else
num_packets = 1;
- }
-
- if (in)
- xfer_len = num_packets * max;
-
- debug("%s: chunk: pid %d xfer_len %u pkts %u\n", __func__,
- *pid, xfer_len, num_packets);
-
- writel((xfer_len << DWC2_HCTSIZ_XFERSIZE_OFFSET) |
- (num_packets << DWC2_HCTSIZ_PKTCNT_OFFSET) |
- (*pid << DWC2_HCTSIZ_PID_OFFSET),
- &hc_regs->hctsiz);
- if (!in && xfer_len) {
- memcpy(priv->aligned_buffer, (char *)buffer + done,
- xfer_len);
+ if (complete_split)
+ setbits_le32(&hc_regs->hcsplt, DWC2_HCSPLT_COMPSPLT);
+ else if (do_split)
+ clrbits_le32(&hc_regs->hcsplt, DWC2_HCSPLT_COMPSPLT);
- flush_dcache_range((unsigned long)priv->aligned_buffer,
- (unsigned long)((void *)priv->aligned_buffer +
- roundup(xfer_len, ARCH_DMA_MINALIGN)));
+ if (eptype == DWC2_HCCHAR_EPTYPE_INTR) {
+ int uframe_num = readl(&host_regs->hfnum);
+ if (!(uframe_num & 0x1))
+ odd_frame = 1;
}
- writel(phys_to_bus((unsigned long)priv->aligned_buffer),
- &hc_regs->hcdma);
-
- /* Set host channel enable after all other setup is complete. */
- clrsetbits_le32(&hc_regs->hcchar, DWC2_HCCHAR_MULTICNT_MASK |
- DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS,
- (1 << DWC2_HCCHAR_MULTICNT_OFFSET) |
- DWC2_HCCHAR_CHEN);
+ ret = transfer_chunk(hc_regs, priv->aligned_buffer, pid,
+ in, (char *)buffer + done, num_packets,
+ xfer_len, &actual_len, odd_frame);
+
+ hcint = readl(&hc_regs->hcint);
+ if (complete_split) {
+ stop_transfer = 0;
+ if (hcint & DWC2_HCINT_NYET) {
+ ret = 0;
+ int frame_num = DWC2_HFNUM_MAX_FRNUM &
+ readl(&host_regs->hfnum);
+ if (((frame_num - ssplit_frame_num) &
+ DWC2_HFNUM_MAX_FRNUM) > 4)
+ ret = -EAGAIN;
+ } else
+ complete_split = 0;
+ } else if (do_split) {
+ if (hcint & DWC2_HCINT_ACK) {
+ ssplit_frame_num = DWC2_HFNUM_MAX_FRNUM &
+ readl(&host_regs->hfnum);
+ ret = 0;
+ complete_split = 1;
+ }
+ }
- ret = wait_for_chhltd(regs, &sub, pid, ignore_ack);
if (ret)
break;
- if (in) {
- xfer_len -= sub;
-
- invalidate_dcache_range((unsigned long)priv->aligned_buffer,
- (unsigned long)((void *)priv->aligned_buffer +
- roundup(xfer_len, ARCH_DMA_MINALIGN)));
-
- memcpy(buffer + done, priv->aligned_buffer, xfer_len);
- if (sub)
- stop_transfer = 1;
- }
+ if (actual_len < xfer_len)
+ stop_transfer = 1;
- done += xfer_len;
+ done += actual_len;
- } while ((done < len) && !stop_transfer);
+ /* Transactions are done when when either all data is transferred or
+ * there is a short transfer. In case of a SPLIT make sure the CSPLIT
+ * is executed.
+ */
+ } while (((done < len) && !stop_transfer) || complete_split);
writel(0, &hc_regs->hcintmsk);
writel(0xFFFFFFFF, &hc_regs->hcint);
{
int devnum = usb_pipedevice(pipe);
int ep = usb_pipeendpoint(pipe);
+ u8* pid;
- if (devnum == priv->root_hub_devnum) {
+ if ((devnum >= MAX_DEVICE) || (devnum == priv->root_hub_devnum)) {
dev->status = 0;
return -EINVAL;
}
- return chunk_msg(priv, dev, pipe, &priv->bulk_data_toggle[devnum][ep],
- usb_pipein(pipe), buffer, len, true);
+ if (usb_pipein(pipe))
+ pid = &priv->in_data_toggle[devnum][ep];
+ else
+ pid = &priv->out_data_toggle[devnum][ep];
+
+ return chunk_msg(priv, dev, pipe, pid, usb_pipein(pipe), buffer, len);
}
static int _submit_control_msg(struct dwc2_priv *priv, struct usb_device *dev,
struct devrequest *setup)
{
int devnum = usb_pipedevice(pipe);
- int pid, ret, act_len;
+ int ret, act_len;
+ u8 pid;
/* For CONTROL endpoint pid should start with DATA1 */
int status_direction;
setup);
}
+ /* SETUP stage */
pid = DWC2_HC_PID_SETUP;
- ret = chunk_msg(priv, dev, pipe, &pid, 0, setup, 8, true);
+ do {
+ ret = chunk_msg(priv, dev, pipe, &pid, 0, setup, 8);
+ } while (ret == -EAGAIN);
if (ret)
return ret;
+ /* DATA stage */
+ act_len = 0;
if (buffer) {
pid = DWC2_HC_PID_DATA1;
- ret = chunk_msg(priv, dev, pipe, &pid, usb_pipein(pipe), buffer,
- len, false);
+ do {
+ ret = chunk_msg(priv, dev, pipe, &pid, usb_pipein(pipe),
+ buffer, len);
+ act_len += dev->act_len;
+ buffer += dev->act_len;
+ len -= dev->act_len;
+ } while (ret == -EAGAIN);
if (ret)
return ret;
- act_len = dev->act_len;
- } /* End of DATA stage */
- else
- act_len = 0;
-
- /* STATUS stage */
- if ((len == 0) || usb_pipeout(pipe))
+ status_direction = usb_pipeout(pipe);
+ } else {
+ /* No-data CONTROL always ends with an IN transaction */
status_direction = 1;
- else
- status_direction = 0;
+ }
+ /* STATUS stage */
pid = DWC2_HC_PID_DATA1;
- ret = chunk_msg(priv, dev, pipe, &pid, status_direction,
- priv->status_buffer, 0, false);
+ do {
+ ret = chunk_msg(priv, dev, pipe, &pid, status_direction,
+ priv->status_buffer, 0);
+ } while (ret == -EAGAIN);
if (ret)
return ret;
DWC2_HPRT0_PRTRST);
for (i = 0; i < MAX_DEVICE; i++) {
- for (j = 0; j < MAX_ENDPOINT; j++)
- priv->bulk_data_toggle[i][j] = DWC2_HC_PID_DATA0;
+ for (j = 0; j < MAX_ENDPOINT; j++) {
+ priv->in_data_toggle[i][j] = DWC2_HC_PID_DATA0;
+ priv->out_data_toggle[i][j] = DWC2_HC_PID_DATA0;
+ }
}
return 0;
projects / platform / kernel / u-boot.git / blobdiff