struct isp116x isp116x_dev;
struct isp116x_platform_data isp116x_board;
-int got_rhsc = 0; /* root hub status change */
+static int got_rhsc; /* root hub status change */
struct usb_device *devgone; /* device which was disconnected */
-int rh_devnum = 0; /* address of Root Hub endpoint */
+static int rh_devnum; /* address of Root Hub endpoint */
/* ------------------------------------------------------------------------- */
done += PTD_GET_LEN(&ptd[i]);
cc = PTD_GET_CC(&ptd[i]);
- if (cc == TD_DATAUNDERRUN) { /* underrun is no error... */
- DBG("allowed data underrun");
- cc = TD_CC_NOERROR;
- }
- if (cc != TD_CC_NOERROR && ret == TD_CC_NOERROR)
+
+ /* Data underrun means basically that we had more buffer space than
+ * the function had data. It is perfectly normal but upper levels have
+ * to know how much we actually transferred.
+ */
+ if (cc == TD_NOTACCESSED ||
+ (cc != TD_CC_NOERROR && (ret == TD_CC_NOERROR || ret == TD_DATAUNDERRUN)))
ret = cc;
}
return ret;
}
-#define PTD_NUM 64 /* it should be enougth... */
-struct ptd ptd[PTD_NUM];
+/* With one PTD we can transfer almost 1K in one go;
+ * HC does the splitting into endpoint digestible transactions
+ */
+struct ptd ptd[1];
+
static inline int max_transfer_len(struct usb_device *dev, unsigned long pipe)
{
- return min(PTD_NUM * usb_maxpacket(dev, pipe), PTD_NUM * 16);
+ unsigned mpck = usb_maxpacket(dev, pipe);
+
+ /* One PTD can transfer 1023 bytes but try to always
+ * transfer multiples of endpoint buffer size
+ */
+ return 1023 / mpck * mpck;
}
/* Do an USB transfer
int max = usb_maxpacket(dev, pipe);
int dir_out = usb_pipeout(pipe);
int speed_low = usb_pipeslow(pipe);
- int i, done, stat, timeout, cc;
- int retries = 10;
+ int i, done = 0, stat, timeout, cc;
+
+ /* 500 frames or 0.5s timeout when function is busy and NAKs transactions for a while */
+ int retries = 500;
DBG("------------------------------------------------");
dump_msg(dev, pipe, buffer, len, "SUBMIT");
DBG("------------------------------------------------");
+ if (len >= 1024) {
+ ERR("Too big job");
+ dev->status = USB_ST_CRC_ERR;
+ return -1;
+ }
+
if (isp116x->disabled) {
ERR("EPIPE");
dev->status = USB_ST_CRC_ERR;
isp116x_write_reg32(isp116x, HCINTSTAT, 0xff);
/* Prepare the PTD data */
- done = 0;
- i = 0;
- do {
- ptd[i].count = PTD_CC_MSK | PTD_ACTIVE_MSK |
- PTD_TOGGLE(usb_gettoggle(dev, epnum, dir_out));
- ptd[i].mps = PTD_MPS(max) | PTD_SPD(speed_low) | PTD_EP(epnum);
- ptd[i].len = PTD_LEN(max > len - done ? len - done : max) |
- PTD_DIR(dir);
- ptd[i].faddr = PTD_FA(usb_pipedevice(pipe));
-
- usb_dotoggle(dev, epnum, dir_out);
- done += PTD_GET_LEN(&ptd[i]);
- i++;
- if (i >= PTD_NUM) {
- ERR("****** Cannot pack buffer! ******");
- dev->status = USB_ST_BUF_ERR;
- return -1;
- }
- } while (done < len);
- ptd[i - 1].mps |= PTD_LAST_MSK;
+ ptd->count = PTD_CC_MSK | PTD_ACTIVE_MSK |
+ PTD_TOGGLE(usb_gettoggle(dev, epnum, dir_out));
+ ptd->mps = PTD_MPS(max) | PTD_SPD(speed_low) | PTD_EP(epnum) | PTD_LAST_MSK;
+ ptd->len = PTD_LEN(len) | PTD_DIR(dir);
+ ptd->faddr = PTD_FA(usb_pipedevice(pipe));
+retry_same:
/* Pack data into FIFO ram */
- pack_fifo(isp116x, dev, pipe, ptd, i, buffer, len);
+ pack_fifo(isp116x, dev, pipe, ptd, 1, buffer, len);
#ifdef EXTRA_DELAY
wait_ms(EXTRA_DELAY);
#endif
}
/* Unpack data from FIFO ram */
- cc = unpack_fifo(isp116x, dev, pipe, ptd, i, buffer, len);
+ cc = unpack_fifo(isp116x, dev, pipe, ptd, 1, buffer, len);
+
+ i = PTD_GET_COUNT(ptd);
+ done += i;
+ buffer += i;
+ len -= i;
- /* Mmm... sometime we get 0x0f as cc which is a non sense!
- * Just retry the transfer...
+ /* There was some kind of real problem; Prepare the PTD again
+ * and retry from the failed transaction on
*/
- if (cc == 0x0f && retries-- > 0) {
- usb_dotoggle(dev, epnum, dir_out);
- goto retry;
+ if (cc && cc != TD_NOTACCESSED && cc != TD_DATAUNDERRUN) {
+ if (retries >= 100) {
+ retries -= 100;
+ /* The chip will have toggled the toggle bit for the failed
+ * transaction too. We have to toggle it back.
+ */
+ usb_settoggle(dev, epnum, dir_out, !PTD_GET_TOGGLE(ptd));
+ goto retry;
+ }
+ }
+ /* "Normal" errors; TD_NOTACCESSED would mean in effect that the function have NAKed
+ * the transactions from the first on for the whole frame. It may be busy and we retry
+ * with the same PTD. PTD_ACTIVE (and not TD_NOTACCESSED) would mean that some of the
+ * PTD didn't make it because the function was busy or the frame ended before the PTD
+ * finished. We prepare the rest of the data and try again.
+ */
+ else if (cc == TD_NOTACCESSED || PTD_GET_ACTIVE(ptd) || (cc != TD_DATAUNDERRUN && PTD_GET_COUNT(ptd) < PTD_GET_LEN(ptd))) {
+ if (retries) {
+ --retries;
+ if (cc == TD_NOTACCESSED && PTD_GET_ACTIVE(ptd) && !PTD_GET_COUNT(ptd)) goto retry_same;
+ usb_settoggle(dev, epnum, dir_out, PTD_GET_TOGGLE(ptd));
+ goto retry;
+ }
}
- if (cc != TD_CC_NOERROR) {
+ if (cc != TD_CC_NOERROR && cc != TD_DATAUNDERRUN) {
DBG("****** completition code error %x ******", cc);
switch (cc) {
case TD_CC_BITSTUFFING:
}
return -cc;
}
+ else usb_settoggle(dev, epnum, dir_out, PTD_GET_TOGGLE(ptd));
dump_msg(dev, pipe, buffer, len, "SUBMIT(ret)");
DBG("");
+ got_rhsc = rh_devnum = 0;
+
/* Init device registers addr */
isp116x->addr_reg = (u16 *) ISP116X_HCD_ADDR;
isp116x->data_reg = (u16 *) ISP116X_HCD_DATA;
projects / oweals / u-boot.git / blobdiff