struct udc_endpoint *udc_endpoint_alloc(unsigned type, unsigned maxpkt)
{
struct udc_endpoint *ept;
unsigned n;
unsigned in;
if (type == UDC_TYPE_BULK_IN) {
in = 1;
} else if (type == UDC_TYPE_BULK_OUT) {
in = 0;
} else {
return 0;
}
for (n = 1; n < 16; n++) {
unsigned bit = in ? EPT_TX(n) : EPT_RX(n);
if (ept_alloc_table & bit)
continue;
ept = _udc_endpoint_alloc(n, in, maxpkt);
if (ept)
ept_alloc_table |= bit;
return ept;
}
return 0;
}
struct udc_endpoint *_udc_endpoint_alloc(unsigned num, unsigned in,
unsigned max_pkt)
{
struct udc_endpoint *ept;
unsigned cfg;
ept = memalign(CACHE_LINE, ROUNDUP(sizeof(*ept), CACHE_LINE));
ept->maxpkt = max_pkt;
ept->num = num;
ept->in = !!in;
ept->req = 0;
cfg = CONFIG_MAX_PKT(max_pkt) | CONFIG_ZLT;
if (ept->in) {
ept->bit = EPT_TX(ept->num);
} else {
ept->bit = EPT_RX(ept->num);
if (num == 0)
cfg |= CONFIG_IOS;
}
ept->head = epts + (num * 2) + (ept->in);
ept->head->config = cfg;
ept->next = ept_list;
ept_list = ept;
DBG("ept%d %s @%p/%p max=%d bit=%x\n",
num, in ? "in" : "out", ept, ept->head, max_pkt, ept->bit);
return ept;
}
int usb_loop_poll_hw(struct usb_ep *_ept, int is_rx)
{
struct msm_endpoint *act_ept, *ept = to_msm_endpoint(_ept);
struct usb_info *ui = ept->ui;
int done = 0;
u32 n;
/* Normally there is a read request in the endpoint, wait for new data */
for (;;) {
n = readl(USB_USBSTS);
writel(n, USB_USBSTS);
if (n & STS_UI) /* finished transaction */
break;
}
/* USB Transaction is complete */
if (n & STS_UI) {
n = readl(USB_ENDPTSETUPSTAT);
if (n & EPT_RX(0))
handle_setup(ui);
n = readl(USB_ENDPTCOMPLETE);
writel(n, USB_ENDPTCOMPLETE);
while (n) {
unsigned bit = __ffs(n);
act_ept = ui->ept + bit;
if (ept == act_ept) {
pr_debug("%s: recv'd right tx %d\n", __func__, bit);
done = 1;
}
else {
pr_debug("%s: recv'd extra tx from ept %d (exp %d)\n",
__func__, bit, ept->bit);
}
/* always call the handler for KGDB and other usb functions.
* this is to avoid hardware timeout, but can leave a bit
* kernel code running when kgdb is invoked to stopped the
* kernel. this works quite well with adb but might not
* support usb mass storage devices very well.
*/
handle_endpoint(ui, bit);
n = n & (~(1 << bit));
}
}
return done ? 0 : -EAGAIN;
}
static irqreturn_t usb_interrupt(int irq, void *data)
{
struct usb_info *ui = data;
unsigned n;
n = readl(USB_USBSTS);
writel(n, USB_USBSTS);
/* somehow we got an IRQ while in the reset sequence: ignore it */
if (ui->running == 0)
return IRQ_HANDLED;
if (n & STS_PCI) {
switch (readl(USB_PORTSC) & PORTSC_PSPD_MASK) {
case PORTSC_PSPD_FS:
INFO("msm72k_udc: portchange USB_SPEED_FULL\n");
ui->gadget.speed = USB_SPEED_FULL;
break;
case PORTSC_PSPD_LS:
INFO("msm72k_udc: portchange USB_SPEED_LOW\n");
ui->gadget.speed = USB_SPEED_LOW;
break;
case PORTSC_PSPD_HS:
INFO("msm72k_udc: portchange USB_SPEED_HIGH\n");
ui->gadget.speed = USB_SPEED_HIGH;
break;
}
}
if (n & STS_URI) {
INFO("msm72k_udc: reset\n");
writel(readl(USB_ENDPTSETUPSTAT), USB_ENDPTSETUPSTAT);
writel(readl(USB_ENDPTCOMPLETE), USB_ENDPTCOMPLETE);
writel(0xffffffff, USB_ENDPTFLUSH);
writel(0, USB_ENDPTCTRL(1));
if (ui->online != 0) {
/* marking us offline will cause ept queue attempts
** to fail
*/
ui->online = 0;
flush_all_endpoints(ui);
/* XXX: we can't seem to detect going offline,
* XXX: so deconfigure on reset for the time being
*/
if (ui->driver) {
printk(KERN_INFO "usb: notify offline\n");
ui->driver->disconnect(&ui->gadget);
}
}
}
if (n & STS_SLI)
INFO("msm72k_udc: suspend\n");
if (n & STS_UI) {
n = readl(USB_ENDPTSETUPSTAT);
if (n & EPT_RX(0))
handle_setup(ui);
n = readl(USB_ENDPTCOMPLETE);
writel(n, USB_ENDPTCOMPLETE);
while (n) {
unsigned bit = __ffs(n);
handle_endpoint(ui, bit);
n = n & (~(1 << bit));
}
}
return IRQ_HANDLED;
}
static void handle_setup(struct usb_info *ui)
{
struct usb_ctrlrequest ctl;
struct usb_request *req = ui->setup_req;
int ret;
/* USB hardware sometimes generate interrupt before
* 8 bytes of SETUP packet are written to system memory.
* This results in fetching wrong setup_data sometimes.
* TODO: Remove below workaround of adding 1us delay once
* it gets fixed in hardware.
*/
udelay(10);
memcpy(&ctl, ui->ep0out.head->setup_data, sizeof(ctl));
writel(EPT_RX(0), USB_ENDPTSETUPSTAT);
if (ctl.bRequestType & USB_DIR_IN)
ui->ep0_dir = USB_DIR_IN;
else
ui->ep0_dir = USB_DIR_OUT;
/* any pending ep0 transactions must be canceled */
flush_endpoint(&ui->ep0out);
flush_endpoint(&ui->ep0in);
#if 0
INFO("setup: type=%02x req=%02x val=%04x idx=%04x len=%04x\n",
ctl.bRequestType, ctl.bRequest, ctl.wValue,
ctl.wIndex, ctl.wLength);
#endif
if ((ctl.bRequestType & (USB_DIR_IN | USB_TYPE_MASK)) ==
(USB_DIR_IN | USB_TYPE_STANDARD)) {
if (ctl.bRequest == USB_REQ_GET_STATUS) {
if (ctl.wLength != 2)
goto stall;
switch (ctl.bRequestType & USB_RECIP_MASK) {
case USB_RECIP_ENDPOINT:
{
struct msm_endpoint *ept;
unsigned num =
ctl.wIndex & USB_ENDPOINT_NUMBER_MASK;
u16 temp = 0;
if (num == 0) {
memset(req->buf, 0, 2);
break;
}
if (ctl.wIndex & USB_ENDPOINT_DIR_MASK)
num += 16;
ept = &ui->ep0out + num;
temp = usb_ep_get_stall(ept);
temp = temp << USB_ENDPOINT_HALT;
memcpy(req->buf, &temp, 2);
break;
}
case USB_RECIP_DEVICE:
{
u16 temp = 0;
temp = 1 << USB_DEVICE_SELF_POWERED;
temp |= (ui->remote_wakeup <<
USB_DEVICE_REMOTE_WAKEUP);
memcpy(req->buf, &temp, 2);
break;
}
case USB_RECIP_INTERFACE:
memset(req->buf, 0, 2);
break;
default:
goto stall;
}
ep0_setup_send(ui, 2);
return;
}
}
if (ctl.bRequestType ==
(USB_DIR_OUT | USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)) {
if ((ctl.bRequest == USB_REQ_CLEAR_FEATURE) ||
(ctl.bRequest == USB_REQ_SET_FEATURE)) {
if ((ctl.wValue == 0) && (ctl.wLength == 0)) {
unsigned num = ctl.wIndex & 0x0f;
if (num != 0) {
struct msm_endpoint *ept;
if (ctl.wIndex & 0x80)
num += 16;
ept = &ui->ep0out + num;
if (ctl.bRequest == USB_REQ_SET_FEATURE)
msm72k_set_halt(&ept->ep, 1);
else
msm72k_set_halt(&ept->ep, 0);
}
goto ack;
}
}
}
if (ctl.bRequestType == (USB_DIR_OUT | USB_TYPE_STANDARD)) {
if (ctl.bRequest == USB_REQ_SET_CONFIGURATION) {
ui->online = !!ctl.wValue;
if (ui->online && ui->usb_connected)
ui->usb_connected(1);
} else if (ctl.bRequest == USB_REQ_SET_ADDRESS) {
/* write address delayed (will take effect
** after the next IN txn)
*/
writel((ctl.wValue << 25) | (1 << 24), USB_DEVICEADDR);
goto ack;
} else if (ctl.bRequest == USB_REQ_SET_FEATURE) {
switch (ctl.wValue) {
case USB_DEVICE_TEST_MODE:
switch (ctl.wIndex) {
case J_TEST:
case K_TEST:
case SE0_NAK_TEST:
case TST_PKT_TEST:
ui->test_mode = ctl.wIndex;
goto ack;
}
goto stall;
case USB_DEVICE_REMOTE_WAKEUP:
ui->remote_wakeup = 1;
goto ack;
}
} else if ((ctl.bRequest == USB_REQ_CLEAR_FEATURE) &&
(ctl.wValue == USB_DEVICE_REMOTE_WAKEUP)) {
ui->remote_wakeup = 0;
goto ack;
}
}
/* delegate if we get here */
if (ui->driver) {
ret = ui->driver->setup(&ui->gadget, &ctl);
if (ret >= 0)
return;
}
stall:
/* stall ep0 on error */
ep0_setup_stall(ui);
return;
ack:
ep0_setup_ack(ui);
}
cfg |= CONFIG_IOS;
}
ept->head = epts + (num * 2) + (ept->in);
ept->head->config = cfg;
ept->next = ept_list;
ept_list = ept;
DBG("ept%d %s @%p/%p max=%d bit=%x\n",
num, in ? "in" : "out", ept, ept->head, max_pkt, ept->bit);
return ept;
}
static unsigned ept_alloc_table = EPT_TX(0) | EPT_RX(0);
struct udc_endpoint *udc_endpoint_alloc(unsigned type, unsigned maxpkt)
{
struct udc_endpoint *ept;
unsigned n;
unsigned in;
if (type == UDC_TYPE_BULK_IN) {
in = 1;
} else if (type == UDC_TYPE_BULK_OUT) {
in = 0;
} else {
return 0;
}
