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usb: dwc2: unify waiting for transfer completion

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Lift common code out of submit_bulk_msg() and submit_control_msg().

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
This commit is contained in:
Stephen Warren 2015-03-07 22:48:51 -07:00 committed by Marek Vasut
parent 319418c01c
commit 4a1d21fc52
1 changed files with 60 additions and 107 deletions
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167
drivers/usb/host/dwc2.c
View file

@ -704,6 +704,36 @@ static int dwc_otg_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
return stat;
}
int wait_for_chhltd(uint32_t *sub, int *toggle)
{
const uint32_t hcint_comp_hlt_ack = DWC2_HCINT_XFERCOMP |
DWC2_HCINT_CHHLTD | DWC2_HCINT_ACK;
struct dwc2_hc_regs *hc_regs = &regs->hc_regs[DWC2_HC_CHANNEL];
int ret;
uint32_t hcint, hctsiz;
ret = wait_for_bit(&hc_regs->hcint, DWC2_HCINT_CHHLTD, true);
if (ret)
return ret;
hcint = readl(&hc_regs->hcint);
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;
if (toggle)
*toggle = (hctsiz & DWC2_HCTSIZ_PID_MASK) >>
DWC2_HCTSIZ_PID_OFFSET;
debug("%s: sub=%u toggle=%d\n", __func__, *sub, toggle ? *toggle : -1);
return 0;
}
/* U-Boot USB transmission interface */
int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len)
@ -712,13 +742,12 @@ int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int ep = usb_pipeendpoint(pipe);
int max = usb_maxpacket(dev, pipe);
int done = 0;
uint32_t hctsiz, sub, tmp;
int ret;
uint32_t sub;
struct dwc2_hc_regs *hc_regs = &regs->hc_regs[DWC2_HC_CHANNEL];
uint32_t hcint;
uint32_t xfer_len;
uint32_t num_packets;
int stop_transfer = 0;
unsigned int timeout = 1000000;
if (devnum == root_hub_devnum) {
dev->status = 0;
@ -771,50 +800,17 @@ int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
(1 << DWC2_HCCHAR_MULTICNT_OFFSET) |
DWC2_HCCHAR_CHEN);
while (1) {
hcint = readl(&hc_regs->hcint);
if (!(hcint & DWC2_HCINT_CHHLTD))
continue;
if (hcint & DWC2_HCINT_XFERCOMP) {
hctsiz = readl(&hc_regs->hctsiz);
done += xfer_len;
sub = hctsiz & DWC2_HCTSIZ_XFERSIZE_MASK;
sub >>= DWC2_HCTSIZ_XFERSIZE_OFFSET;
if (usb_pipein(pipe)) {
done -= sub;
if (hctsiz & DWC2_HCTSIZ_XFERSIZE_MASK)
stop_transfer = 1;
}
tmp = hctsiz & DWC2_HCTSIZ_PID_MASK;
tmp >>= DWC2_HCTSIZ_PID_OFFSET;
if (tmp == DWC2_HC_PID_DATA1) {
bulk_data_toggle[devnum][ep] =
DWC2_HC_PID_DATA1;
} else {
bulk_data_toggle[devnum][ep] =
DWC2_HC_PID_DATA0;
}
break;
}
if (hcint & DWC2_HCINT_STALL) {
puts("DWC OTG: Channel halted\n");
bulk_data_toggle[devnum][ep] =
DWC2_HC_PID_DATA0;
ret = wait_for_chhltd(&sub, &bulk_data_toggle[devnum][ep]);
if (ret) {
stop_transfer = 1;
break;
}
done += xfer_len;
if (usb_pipein(pipe)) {
done -= sub;
if (sub)
stop_transfer = 1;
break;
}
if (!--timeout) {
printf("%s: Timeout!\n", __func__);
break;
}
}
}
@ -838,11 +834,8 @@ int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int devnum = usb_pipedevice(pipe);
int ep = usb_pipeendpoint(pipe);
int max = usb_maxpacket(dev, pipe);
uint32_t hctsiz = 0, sub, tmp, ret;
uint32_t hcint;
const uint32_t hcint_comp_hlt_ack = DWC2_HCINT_XFERCOMP |
DWC2_HCINT_CHHLTD | DWC2_HCINT_ACK;
unsigned int timeout = 1000000;
int ret;
uint32_t sub;
/* For CONTROL endpoint pid should start with DATA1 */
int status_direction;
@ -878,14 +871,8 @@ int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS,
(1 << DWC2_HCCHAR_MULTICNT_OFFSET) | DWC2_HCCHAR_CHEN);
ret = wait_for_bit(&hc_regs->hcint, DWC2_HCINT_CHHLTD, 1);
if (ret)
printf("%s: Timeout!\n", __func__);
hcint = readl(&hc_regs->hcint);
if (!(hcint & DWC2_HCINT_CHHLTD) || !(hcint & DWC2_HCINT_XFERCOMP)) {
printf("%s: Error (HCINT=%08x)\n", __func__, hcint);
ret = wait_for_chhltd(&sub, NULL);
if (ret) {
dev->status = 0;
dev->act_len = 0;
return -EINVAL;
@ -917,47 +904,16 @@ int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
(1 << DWC2_HCCHAR_MULTICNT_OFFSET) |
DWC2_HCCHAR_CHEN);
while (1) {
hcint = readl(&hc_regs->hcint);
if (!(hcint & DWC2_HCINT_CHHLTD))
continue;
if (hcint & DWC2_HCINT_XFERCOMP) {
hctsiz = readl(&hc_regs->hctsiz);
done = len;
sub = hctsiz & DWC2_HCTSIZ_XFERSIZE_MASK;
sub >>= DWC2_HCTSIZ_XFERSIZE_OFFSET;
if (usb_pipein(pipe))
done -= sub;
}
if (hcint & DWC2_HCINT_ACK) {
tmp = hctsiz & DWC2_HCTSIZ_PID_MASK;
tmp >>= DWC2_HCTSIZ_PID_OFFSET;
if (tmp == DWC2_HC_PID_DATA0) {
control_data_toggle[devnum][ep] =
DWC2_HC_PID_DATA0;
} else {
control_data_toggle[devnum][ep] =
DWC2_HC_PID_DATA1;
}
}
if (hcint != hcint_comp_hlt_ack) {
printf("%s: Error (HCINT=%08x)\n",
__func__, hcint);
goto out;
}
if (!--timeout) {
printf("%s: Timeout!\n", __func__);
goto out;
}
break;
ret = wait_for_chhltd(&sub, &control_data_toggle[devnum][ep]);
if (ret) {
dev->status = 0;
dev->act_len = 0;
return -EINVAL;
}
done = len;
if (usb_pipein(pipe))
done -= sub;
} /* End of DATA stage */
/* STATUS stage */
@ -980,20 +936,17 @@ int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
DWC2_HCCHAR_CHEN | DWC2_HCCHAR_CHDIS,
(1 << DWC2_HCCHAR_MULTICNT_OFFSET) | DWC2_HCCHAR_CHEN);
while (1) {
hcint = readl(&hc_regs->hcint);
if (hcint & DWC2_HCINT_CHHLTD)
break;
ret = wait_for_chhltd(&sub, NULL);
if (ret) {
dev->status = 0;
dev->act_len = 0;
return -EINVAL;
}
if (hcint != hcint_comp_hlt_ack)
printf("%s: Error (HCINT=%08x)\n", __func__, hcint);
out:
dev->act_len = done;
dev->status = 0;
return done;
return 0;
}
int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,