bool udd_ep_run(udd_ep_id_t ep, bool b_shortpacket,
uint8_t * buf, iram_size_t buf_size,
udd_callback_trans_t callback)
{
udd_ep_id_t ep_num;
udd_ep_job_t *ptr_job;
irqflags_t flags;
ep_num = ep & USB_EP_ADDR_MASK;
if (USB_DEVICE_MAX_EP < ep_num) {
return false;
}
if ((!Is_udd_endpoint_enabled(ep_num))
|| Is_udd_endpoint_stall_requested(ep_num)) {
return false; // Endpoint is halted
}
// Get job about endpoint
ptr_job = &udd_ep_job[ep_num - 1];
flags = cpu_irq_save();
if (ptr_job->busy == true) {
cpu_irq_restore(flags);
return false; // Job already on going
}
ptr_job->busy = true;
cpu_irq_restore(flags);
// No job running. Let's setup a new one.
//
ptr_job->buf = buf;
ptr_job->buf_size = buf_size;
ptr_job->nb_trans = 0;
ptr_job->call_trans = callback;
ptr_job->b_shortpacket = b_shortpacket;
ptr_job->b_use_out_cache_buffer = false;
if ( (USB_EP_DIR_IN != (ep & USB_EP_DIR_IN))
&& (AVR32_USBC_PTYPE_ISOCHRONOUS == udd_get_endpoint_type(ep_num))
&& (0 != (buf_size % udd_get_endpoint_size(ep_num)))) {
// The user must use a buffer size modulo endpoint size
// for an isochronous IN endpoint
ptr_job->busy = false;
return false;
}
// Initialize value to simulate a empty transfer
udd_udesc_rst_buf0_ctn(ep_num);
udd_udesc_rst_buf0_size(ep_num);
// Request next transfer
udd_ep_trans_done(ep);
return true;
}
static void udd_ep_trans_done(udd_ep_id_t ep)
{
uint32_t udd_dma_ctrl = 0;
udd_ep_job_t *ptr_job;
iram_size_t next_trans;
irqflags_t flags;
// Get job corresponding at endpoint
ptr_job = &udd_ep_job[ep - 1];
if (!ptr_job->busy) {
return; // No job is running, then ignore it (system error)
}
if (ptr_job->nb_trans != ptr_job->buf_size) {
// Need to send or receive other data
next_trans = ptr_job->buf_size - ptr_job->nb_trans;
if (UDD_ENDPOINT_MAX_TRANS < next_trans) {
// The USB hardware support a maximum
// transfer size of UDD_ENDPOINT_MAX_TRANS Bytes
next_trans = UDD_ENDPOINT_MAX_TRANS;
// Set 0 to transfer the maximum
udd_dma_ctrl = (0 <<
AVR32_USBB_UDDMA1_CONTROL_CH_BYTE_LENGTH_OFFSET)
& AVR32_USBB_UDDMA1_CONTROL_CH_BYTE_LENGTH_MASK;
} else {
udd_dma_ctrl = (next_trans <<
AVR32_USBB_UDDMA1_CONTROL_CH_BYTE_LENGTH_OFFSET)
& AVR32_USBB_UDDMA1_CONTROL_CH_BYTE_LENGTH_MASK;
}
if (Is_udd_endpoint_in(ep)) {
if (0 != next_trans % udd_get_endpoint_size(ep)) {
// Enable short packet option
// else the DMA transfer is accepted
// and interrupt DMA valid but nothing is sent.
udd_dma_ctrl |= AVR32_USBB_UDDMA1_CONTROL_DMAEND_EN_MASK;
// No need to request another ZLP
ptr_job->b_shortpacket = false;
}
} else {
if ((USB_EP_TYPE_ISOCHRONOUS != udd_get_endpoint_type(ep))
|| (next_trans <= udd_get_endpoint_size(ep))) {
// Enable short packet reception
udd_dma_ctrl |= AVR32_USBB_UDDMA1_CONTROL_EOT_IRQ_EN_MASK
| AVR32_USBB_UDDMA1_CONTROL_BUFF_CLOSE_IN_EN_MASK;
}
}
// Start USB DMA to fill or read fifo of the selected endpoint
udd_endpoint_dma_set_addr(ep, (U32) &ptr_job->buf[ptr_job->nb_trans]);
udd_dma_ctrl |= AVR32_USBB_UDDMA1_CONTROL_EOBUFF_IRQ_EN_MASK |
AVR32_USBB_UDDMA1_CONTROL_CH_EN_MASK;
// Disable IRQs to have a short sequence
// between read of EOT_STA and DMA enable
flags = cpu_irq_save();
if ( !(udd_endpoint_dma_get_status(ep)
& AVR32_USBB_UDDMA1_STATUS_EOT_STA_MASK)) {
udd_endpoint_dma_set_control(ep, udd_dma_ctrl);
ptr_job->nb_trans += next_trans;
udd_enable_endpoint_dma_interrupt(ep);
cpu_irq_restore(flags);
return;
}
cpu_irq_restore(flags);
// Here a ZLP has been received
// and the DMA transfer must be not started.
// It is the end of transfer
ptr_job->buf_size = ptr_job->nb_trans;
}
if (Is_udd_endpoint_in(ep)) {
if (ptr_job->b_shortpacket) {
// Need to send a ZLP (No possible with USB DMA)
// enable interrupt to wait a free bank to sent ZLP
udd_ack_in_send(ep);
if (Is_udd_write_enabled(ep)) {
// Force interrupt in case of ep already free
udd_raise_in_send(ep);
}
udd_enable_in_send_interrupt(ep);
udd_enable_endpoint_interrupt(ep);
return;
}
}
// Call callback to signal end of transfer
udd_ep_finish_job(ptr_job, false, ep);
}
static bool udd_ep_interrupt(void)
{
udd_ep_id_t ep;
udd_ep_job_t *ptr_job;
// For each endpoint different of control endpoint (0)
for (ep = 1; ep <= USB_DEVICE_MAX_EP; ep++) {
// Check RXRDY and TXEMPTY event for none DMA endpoints
if (!Is_udd_endpoint_interrupt_enabled(ep)) {
continue;
}
// Get job corresponding at endpoint
ptr_job = &udd_ep_job[ep - 1];
// RXOUT: Full packet received
if (Is_udd_any_bank_received(ep)) {
udd_ep_out_received(ep);
return true;
}
// TXIN: packet sent
if (Is_udd_in_sent(ep)) {
ptr_job->bank--;
// Stall when all banks free
if (ptr_job->b_stall_requested) {
if (ptr_job->bank) {
// Send remaining
udd_set_transmit_ready(ep);
udd_ack_in_sent(ep);
} else {
// Ack last packet
udd_ack_in_sent(ep);
// Enable stall
udd_enable_stall_handshake(ep);
// Halt executed
ptr_job->b_stall_requested = false;
}
return true;
}
// Finish Job when buffer end
if (ptr_job->b_buf_end) {
ptr_job->b_buf_end = false;
ptr_job->buf_size = ptr_job->buf_cnt; // buf_size is passed to callback as XFR count
udd_ep_finish_job(ptr_job, UDD_EP_TRANSFER_OK, ep);
}
if (ptr_job->buf_cnt >= ptr_job->buf_size &&
!ptr_job->b_shortpacket &&
ptr_job->bank == 0) {
// All transfer done, including ZLP
irqflags_t flags = cpu_irq_save();
udd_disable_endpoint_interrupt(ep);
cpu_irq_restore(flags);
// Ack last packet
udd_ack_in_sent(ep);
return true;
} else if (udd_get_endpoint_bank_max_nbr(ep) > 1
&& ptr_job->bank > 0) {
// Already banks buffered, transmit while loading
udd_set_transmit_ready(ep);
udd_ack_in_sent(ep);
udd_ep_in_sent(ep, false);
} else if (udd_get_endpoint_bank_max_nbr(ep) > 1) {
// Still bank free, load and transmit
if (!udd_ep_in_sent(ep, true)) {
ptr_job->b_buf_end = false;
ptr_job->buf_size = ptr_job->buf_cnt; // buf_size is passed to callback as XFR count
udd_ep_finish_job(ptr_job, UDD_EP_TRANSFER_OK, ep);
}
udd_ack_in_sent(ep);
udd_ep_in_sent(ep, false);
} else {
// Single bank transfer, ack when ready
udd_ep_in_sent(ep, true);
udd_ack_in_sent(ep);
}
return true;
}
// Stall sent/CRC error
if (Is_udd_stall(ep)) {
udd_ack_stall(ep);
if (udd_get_endpoint_type(ep) == UDP_CSR_EPTYPE_ISO_OUT ||
udd_get_endpoint_type(ep) == UDP_CSR_EPTYPE_ISO_IN) {
}
return true;
}
}
return false;
}
bool udd_ep_run(udd_ep_id_t ep, bool b_shortpacket,
uint8_t * buf, iram_size_t buf_size,
udd_callback_trans_t callback)
{
uint16_t ep_size, trans_size, short_packet;
bool b_dir_in;
udd_ep_job_t *ptr_job;
irqflags_t flags;
b_dir_in = (USB_EP_DIR_IN == (ep & USB_EP_DIR_IN));
ep &= USB_EP_ADDR_MASK;
if (USB_DEVICE_MAX_EP < ep)
return false;
// Get job about endpoint
ptr_job = &udd_ep_job[ep - 1];
if ((!Is_udd_endpoint_enabled(ep))
|| Is_udd_endpoint_stall_requested(ep))
return false; // Endpoint is halted
flags = cpu_irq_save();
if (ptr_job->busy == true) {
cpu_irq_restore(flags);
return false; // Job already on going
}
ptr_job->busy = true;
cpu_irq_restore(flags);
// No job running. Let's setup a new one.
//
// The USB hardware support a maximum transfer size of 0x7FFF Bytes
ep_size = udd_get_endpoint_size(ep);
if (0x7FFF < buf_size) {
trans_size = 0x7FFF - (0x7FFF % ep_size);
short_packet = 0;
} else {
trans_size = buf_size;
short_packet = trans_size % ep_size;
}
if (b_dir_in) {
// Need ZLP, if requested and last packet is not a short packet
udd_udesc_set_buf0_autozlp(ep, b_shortpacket);
udd_udesc_set_buf0_ctn(ep, trans_size);
udd_udesc_rst_buf0_size(ep);
// Link the user buffer directly on USB hardware DMA
udd_udesc_set_buf0_addr(ep, buf);
} else {
udd_udesc_rst_buf0_ctn(ep);
ptr_job->nb_trans = 0;
if (trans_size < ep_size) {
// The user buffer is smaller than endpoint size
if (AVR32_USBC_PTYPE_ISOCHRONOUS ==
udd_get_endpoint_type(ep)) {
ptr_job->busy = false;
return false; // The user must use a buffer corresponding at isochrnous endpoint size
}
// Use the cache buffer for Bulk or Interrupt size endpoint
ptr_job->b_use_out_cache_buffer = true;
udd_udesc_set_buf0_addr(ep,
udd_ep_out_cache_buffer[ep - 1]);
udd_udesc_set_buf0_size(ep, ep_size);
} else {
// Link the user buffer directly on USB hardware DMA
ptr_job->b_use_out_cache_buffer = false;
udd_udesc_set_buf0_addr(ep, buf);
udd_udesc_set_buf0_size(ep, trans_size - short_packet);
}
}
// Update Job information
ptr_job->buf = buf;
ptr_job->buf_size = trans_size;
ptr_job->call_trans = callback;
ptr_job->busy = true;
// Start transfer
udd_disable_busy_bank0(ep);
// Enable interrupt
flags = cpu_irq_save();
if (b_dir_in) {
udd_ack_fifocon(ep);
udd_ack_in_send(ep);
udd_enable_in_send_interrupt(ep);
} else {
udd_enable_out_received_interrupt(ep);
}
udd_enable_endpoint_interrupt(ep);
cpu_irq_restore(flags);
return true;
}
