void usb_handle_irq(void) {
unsigned n;
USB_IRQ_COUNT++;
// P("usb %x\n", USB_IRQ_COUNT);
n = readl(USB_INT_STATUS);
//writel(n & (USB_INT_EP0 | USB_INT_EP1), USB_INT_CLEAR);
writel(n, USB_INT_CLEAR);
if (n & USB_INT_FRAME)
msec_counter++;
if (n & USB_INT_EP0)
usb_ep0_rx();
if (n & USB_INT_EP1)
usb_ep0_tx();
/* ignore masked interrupts */
n &= readl(USB_INT_ENABLE);
if (n & ~(USB_INT_FRAME)) {
// P("usb n 0x%x\n", n);
}
if ((n & USB_INT_EP2) && usb_ep1_rx_full_cb)
usb_ep1_rx_full_cb();
if ((n & USB_INT_EP3) && usb_ep1_tx_empty_cb)
usb_ep1_tx_empty_cb();
#if CONFIG_USB_2ND_IFC
if ((n & USB_INT_EP4) && usb_ep2_rx_full_cb)
usb_ep2_rx_full_cb();
if ((n & USB_INT_EP5) && usb_ep2_tx_empty_cb)
usb_ep2_tx_empty_cb();
#endif
}
/* Windows 7 fails to configure device unless this is implemented */
static int
cdc_handle_control(struct usb_ctrl_req_t *req, void *data)
{
struct cdc_ctx *ctx = data;
switch ((enum cdc_ctrl_req_code)req->bRequest) {
case USB_CTRL_REQ_CDC_SET_LINE_CODING: {
if (req->wLength != sizeof(struct cdc_line_coding)) {
usb_handle_control_status(1);
} else {
usb_ep0_rx(&ctx->line_coding, req->wLength, cdc_handle_control_set_line_coding, ctx);
return 1;
}
break;
}
case USB_CTRL_REQ_CDC_GET_LINE_CODING: {
usb_ep0_tx_cp(&ctx->line_coding, sizeof(struct cdc_line_coding), req->wLength, NULL, NULL);
usb_handle_control_status(0);
break;
}
case USB_CTRL_REQ_CDC_SET_CTRL_LINE_STATE: {
/*
* We should remain inactive unless there is a terminal on the other end of the link,
* indicated by the first two bits of wValue
*/
ctx->control_lines = req->wValue;
usb_handle_control_status(0);
break;
}
default:
return 0;
}
return 0;
}
int
dfu_handle_control(struct usb_ctrl_req_t *req, void *data)
{
struct dfu_ctx *ctx = data;
int fail = 1;
/* XXX check for std vs class request */
switch ((uint8_t)req->bRequest) {
case USB_CTRL_REQ_SET_INTERFACE:
if (req->wValue >= ctx->dfuf->segment_count)
goto out;
ctx->segment = req->wValue;
ctx->state = DFU_STATE_dfuIDLE;
break;
case USB_CTRL_REQ_GET_INTERFACE:
usb_ep0_tx_cp(&ctx->segment, 1, req->wLength, NULL, NULL);
break;
case USB_CTRL_REQ_DFU_DNLOAD: {
void *buf;
switch (ctx->state) {
case DFU_STATE_dfuIDLE:
ctx->off = 0;
break;
case DFU_STATE_dfuDNLOAD_IDLE:
break;
default:
goto err;
}
/**
* XXX we are not allowed to STALL here, and we need to eat all transferred data.
* better not allow setup_write to break the protocol.
*/
ctx->status = ctx->dfuf->segment[ctx->segment].setup_write(ctx, ctx->off, req->wLength, &buf);
if (ctx->status != DFU_STATUS_OK) {
ctx->state = DFU_STATE_dfuERROR;
goto err_have_status;
}
if (req->wLength > 0) {
ctx->state = DFU_STATE_dfuDNLOAD_SYNC;
usb_ep0_rx(buf, req->wLength, dfu_dnload_complete, ctx);
} else {
ctx->state = DFU_STATE_dfuMANIFEST_SYNC;
dfu_dnload_complete(NULL, 0, ctx);
}
goto out_no_status;
}
case USB_CTRL_REQ_DFU_GETSTATUS: {
struct dfu_status_t st;
st.bState = ctx->state;
st.bStatus = ctx->status;
st.bwPollTimeout = 1; /* XXX allow setting in desc? */
/**
* If we're in DFU_STATE_dfuMANIFEST, we just finished
* the download, and we're just about to send our last
* status report. Once the report has been sent, go
* and reset the system to put the new firmware into
* effect.
*/
usb_ep0_tx_cp(&st, sizeof(st), req->wLength, NULL, NULL);
break;
}
case USB_CTRL_REQ_DFU_CLRSTATUS:
if (ctx->state != DFU_STATE_dfuERROR)
goto err;
ctx->state = DFU_STATE_dfuIDLE;
ctx->status = DFU_STATUS_OK;
break;
case USB_CTRL_REQ_DFU_GETSTATE: {
uint8_t st = ctx->state;
usb_ep0_tx_cp(&st, sizeof(st), req->wLength, NULL, NULL);
break;
}
case USB_CTRL_REQ_DFU_ABORT:
switch (ctx->state) {
case DFU_STATE_dfuIDLE:
case DFU_STATE_dfuDNLOAD_IDLE:
/* case DFU_STATE_dfuUPLOAD_IDLE: */
ctx->state = DFU_STATE_dfuIDLE;
break;
default:
goto err;
}
break;
/* case USB_CTRL_REQ_DFU_UPLOAD: */
default:
return (0);
}
fail = 0;
goto out;
err:
ctx->status = DFU_STATUS_errSTALLEDPKT;
err_have_status:
ctx->state = DFU_STATE_dfuERROR;
out:
usb_handle_control_status(fail);
out_no_status:
return (1);
}
/*
* Handle class (HID) specific calls.
*
* see hid_handle_control()
*/
static int
hid_handle_control_class(struct usb_ctrl_req_t *req, struct hid_ctx *ctx)
{
size_t len = 0;
/* XXX maintain state for all report descriptors */
switch ((enum hid_ctrl_req_code)req->bRequest) {
case USB_CTRL_REQ_HID_GET_REPORT: {
enum hid_report_type report_type = req->wValue >> 8;
uint8_t report_id = req->wValue & 0xff;
int ret = -1;
ctx->get_report_outstanding_length = req->wLength;
if (ctx->hidf->get_report)
ret = ctx->hidf->get_report(ctx, report_type, report_id);
if (ret <= 0) {
ctx->get_report_outstanding_length = 0;
usb_handle_control_status(1);
}
return (1);
}
case USB_CTRL_REQ_HID_SET_REPORT: {
int ret = -1;
void *buf = NULL;
ctx->set_report_length = req->wLength;
ctx->set_report_type = req->wValue >> 8;
ctx->set_report_id = req->wValue & 0xff;
if (ctx->hidf->set_report)
ret = ctx->hidf->set_report(ctx->set_report_type, ctx->set_report_id, &buf, ctx->set_report_length);
if (ret > 0)
usb_ep0_rx(buf, ctx->set_report_length, hid_set_report_done, ctx);
else
usb_handle_control_status(1);
return (1);
}
case USB_CTRL_REQ_HID_GET_IDLE:
/* XXX implement */
usb_ep0_tx_cp(&len, 1, req->wLength, NULL, NULL);
usb_handle_control_status(0);
return (1);
case USB_CTRL_REQ_HID_SET_IDLE:
/* XXX implement */
usb_handle_control_status(0);
return (1);
case USB_CTRL_REQ_HID_GET_PROTOCOL:
/* XXX implement */
/* usb_ep0_tx_cp(&len, 1, req->wLength, NULL, NULL); */
/* usb_handle_control_status(0); */
return (0);
case USB_CTRL_REQ_HID_SET_PROTOCOL:
/* XXX implement */
usb_handle_control_status(0);
return (1);
default:
return (0);
}
}
