void udd_ep_abort(udd_ep_id_t ep)
{
bool b_dir_in = ep & USB_EP_DIR_IN;
irqflags_t flags;
ep &= USB_EP_ADDR_MASK;
if (USB_DEVICE_MAX_EP < ep)
return;
// Disable interrupts
flags = cpu_irq_save();
udd_disable_endpoint_interrupt(ep);
cpu_irq_restore(flags);
// Clear pending statuses
if (b_dir_in) {
// Kill banks
if (Is_udd_transmit_ready(ep)) {
udd_kill_data_in_fifo(ep,
udd_get_endpoint_bank_max_nbr(ep)>1);
}
udd_ack_in_sent(ep);
// Reset number of buffered banks
udd_ep_job[ep - 1].bank = 0;
} else {
// Clear all pending banks statuses
while(Is_udd_any_bank_received(ep)) {
udd_ep_ack_out_received(ep);
}
}
// Reset FIFO and data toggle
udd_reset_endpoint(ep);
// Abort job
udd_ep_abort_job(ep);
}
void udd_ep_abort(udd_ep_id_t ep)
{
irqflags_t flags;
udd_ep_job_t *ptr_job;
ep &= USB_EP_ADDR_MASK;
// Disable interrupt of endpoint
flags = cpu_irq_save();
udd_disable_endpoint_interrupt(ep);
cpu_irq_restore(flags);
// Stop transfer
udd_enable_busy_bank0(ep);
// Job complete then call callback
ptr_job = &udd_ep_job[ep - 1];
if (!ptr_job->busy) {
return;
}
ptr_job->busy = false;
if (NULL != ptr_job->call_trans) {
if (Is_udd_endpoint_in(ep)) {
ep |= USB_EP_DIR_IN;
}
// It can be a Transfer or stall callback
ptr_job->call_trans(UDD_EP_TRANSFER_ABORT, ptr_job->nb_trans, 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++) {
// Get job corresponding at endpoint
ptr_job = &udd_ep_job[ep - 1];
// Check DMA event
if (Is_udd_endpoint_dma_interrupt_enabled(ep)
&& Is_udd_endpoint_dma_interrupt(ep)) {
uint32_t nb_remaining;
if( udd_endpoint_dma_get_status(ep)
& AVR32_USBB_UDDMA1_STATUS_CH_EN_MASK) {
return true; // Ignore EOT_STA interrupt
}
udd_disable_endpoint_dma_interrupt(ep);
// Save number of data no transfered
nb_remaining = (udd_endpoint_dma_get_status(ep) &
AVR32_USBB_UDDMA1_STATUS_CH_BYTE_CNT_MASK)
>> AVR32_USBB_UDDMA1_STATUS_CH_BYTE_CNT_OFFSET;
if (nb_remaining) {
// Transfer no complete (short packet or ZLP) then:
// Update number of data transfered
ptr_job->nb_trans -= nb_remaining;
// Set transfer complete to stop the transfer
ptr_job->buf_size = ptr_job->nb_trans;
}
udd_ep_trans_done(ep);
return true;
}
// Check empty bank interrupt event
if (Is_udd_endpoint_interrupt_enabled(ep)) {
if (Is_udd_in_send_interrupt_enabled(ep) && Is_udd_in_send(ep)) {
udd_disable_in_send_interrupt(ep);
// One bank is free then send a ZLP
udd_ack_in_send(ep);
udd_ack_fifocon(ep);
udd_ep_finish_job(ptr_job, false, ep);
return true;
}
if (Is_udd_bank_interrupt_enabled(ep) && (0 == udd_nb_busy_bank(ep))) {
// End of background transfer on IN endpoint
udd_disable_bank_interrupt(ep);
udd_disable_endpoint_interrupt(ep);
Assert(ptr_job->stall_requested);
// A stall has been requested during background transfer
ptr_job->stall_requested = false;
udd_disable_endpoint_bank_autoswitch(ep);
udd_enable_stall_handshake(ep);
udd_reset_data_toggle(ep);
return true;
}
}
}
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 DMA event
if (Is_udd_endpoint_dma_interrupt_enabled(ep)
&& Is_udd_endpoint_dma_interrupt(ep)) {
uint32_t nb_remaining;
udd_disable_endpoint_dma_interrupt(ep);
// Save number of data no transfered
nb_remaining = (udd_endpoint_dma_get_status(ep) &
AVR32_USBB_UDDMA1_STATUS_CH_BYTE_CNT_MASK)
>>
AVR32_USBB_UDDMA1_STATUS_CH_BYTE_CNT_OFFSET;
// Get job corresponding at endpoint
ptr_job = &udd_ep_job[ep - 1];
// Update number of data transfered
ptr_job->buf_size -= nb_remaining;
if (!Is_udd_endpoint_in(ep)) {
// Disable autoswitch bank on OUT
udd_disable_endpoint_bank_autoswitch(ep);
} else {
// Wait end of background transfer on IN endpoint before disabled autoswitch bank
udd_enable_endpoint_interrupt(ep);
udd_enable_bank_interrupt(ep);
}
// Call callback to signal end of transfer
udd_ep_finish_job(&udd_ep_job[ep - 1], false);
return true;
}
// Check empty bank interrupt event
if (Is_udd_endpoint_interrupt_enabled(ep)
&& (0 == udd_nb_busy_bank(ep))) {
// End of background transfer on IN endpoint
udd_disable_bank_interrupt(ep);
udd_disable_endpoint_interrupt(ep);
// If no new transfer running then disable autoswitch bank
if (!udd_ep_job[ep - 1].busy) {
udd_disable_endpoint_bank_autoswitch(ep);
}
// If a stall has been requested during backgound transfer then execute it
if (udd_ep_job[ep - 1].stall_requested) {
udd_ep_job[ep - 1].stall_requested = false;
udd_enable_stall_handshake(ep);
udd_reset_data_toggle(ep);
}
return true;
}
}
void udd_ep_abort(udd_ep_id_t ep)
{
uint8_t index = ep & USB_EP_ADDR_MASK;
// Stop DMA transfer
udd_disable_endpoint_dma_interrupt(index);
udd_endpoint_dma_set_control(index, 0);
// Kill banks
udd_disable_endpoint_interrupt(index);
while (udd_nb_busy_bank(index)) {
udd_kill_last_in_bank(index);
while(Is_udd_killing_last_in_bank(index));
}
udd_ep_abort_job(ep);
}
bool udd_ep_clear_halt(udd_ep_id_t ep)
{
bool b_stall_cleared = false;
udd_ep_job_t *ptr_job;
ep &= USB_EP_ADDR_MASK;
if (USB_DEVICE_MAX_EP < ep)
return false;
ptr_job = &udd_ep_job[ep - 1];
if (ptr_job->stall_requested) {
// Endpoint stall has been requested but not done
// Remove stall request
ptr_job->stall_requested = false;
udd_disable_bank_interrupt(ep);
udd_disable_endpoint_interrupt(ep);
b_stall_cleared = true;
}
if (Is_udd_endpoint_stall_requested(ep)) {
if (Is_udd_stall(ep)) {
udd_ack_stall(ep);
// A packet has been stalled
// then reset datatoggle
udd_reset_data_toggle(ep);
}
// Disable stall
udd_disable_stall_handshake(ep);
udd_enable_endpoint_bank_autoswitch(ep);
b_stall_cleared = true;
}
if (b_stall_cleared) {
// If a job is register on clear halt action
// then execute callback
if (ptr_job->busy == true) {
ptr_job->busy = false;
ptr_job->call_nohalt();
}
}
return true;
}
static void udd_ep_out_received(udd_ep_id_t ep)
{
udd_ep_job_t *ptr_job = &udd_ep_job[ep - 1];
uint32_t nb_data = 0, i;
uint32_t nb_remain = ptr_job->buf_size - ptr_job->buf_cnt;
uint32_t pkt_size = ptr_job->size;
uint8_t *ptr_dst = &ptr_job->buf[ptr_job->buf_cnt];
bool b_full = false, b_short;
// Read byte count
nb_data = udd_byte_count(ep);
b_short = (nb_data < pkt_size);
// Copy data if there is
if (nb_data > 0) {
if (nb_data >= nb_remain) {
nb_data = nb_remain;
b_full = true;
}
// Modify job information
ptr_job->buf_cnt += nb_data;
// Copy FIFO (DPRAM) to buffer
for (i = 0; i < nb_data; i++) {
*ptr_dst++ = udd_endpoint_fifo_read(ep);
}
}
// Clear FIFO Status
udd_ep_ack_out_received(ep);
// Finish job on error or short packet
if ((b_full || b_short) &&
!Is_udd_endpoint_stall_requested(ep)) {
udd_disable_endpoint_interrupt(ep);
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);
}
}
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;
}
static void udd_ep_trans_done(udd_ep_id_t ep)
{
udd_ep_job_t *ptr_job;
uint16_t ep_size, nb_trans;
uint16_t next_trans;
udd_ep_id_t ep_num;
irqflags_t flags;
ep_num = ep & USB_EP_ADDR_MASK;
ep_size = udd_get_endpoint_size(ep_num);
// Get job corresponding at endpoint
ptr_job = &udd_ep_job[ep_num - 1];
// Disable interrupt of endpoint
flags = cpu_irq_save();
udd_disable_endpoint_interrupt(ep_num);
cpu_irq_restore(flags);
if (!ptr_job->busy) {
return; // No job is running, then ignore it (system error)
}
if (USB_EP_DIR_IN == (ep & USB_EP_DIR_IN)) {
// Transfer complete on IN
nb_trans = udd_udesc_get_buf0_size(ep_num);
// Lock emission of new IN packet
udd_enable_busy_bank0(ep_num);
// Ack interrupt
udd_ack_in_send(ep_num);
if (0 == nb_trans) {
if (0 == udd_nb_busy_bank(ep_num)) {
// All byte are transfered than take nb byte requested
nb_trans = udd_udesc_get_buf0_ctn(ep_num);
}
}
// Update number of data transfered
ptr_job->nb_trans += nb_trans;
// Need to send other data
if ((ptr_job->nb_trans != ptr_job->buf_size)
|| ptr_job->b_shortpacket) {
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 -
(UDD_ENDPOINT_MAX_TRANS % ep_size);
udd_udesc_set_buf0_autozlp(ep_num, false);
} else {
// Need ZLP, if requested and last packet is not a short packet
udd_udesc_set_buf0_autozlp(ep_num, ptr_job->b_shortpacket);
ptr_job->b_shortpacket = false; // No need to request another ZLP
}
udd_udesc_set_buf0_ctn(ep_num, next_trans);
udd_udesc_rst_buf0_size(ep_num);
// Link the user buffer directly on USB hardware DMA
udd_udesc_set_buf0_addr(ep_num,
&ptr_job->buf[ptr_job->nb_trans]);
// Start transfer
udd_ack_fifocon(ep_num);
udd_disable_busy_bank0(ep_num);
// Enable interrupt
flags = cpu_irq_save();
udd_enable_in_send_interrupt(ep_num);
udd_enable_endpoint_interrupt(ep_num);
cpu_irq_restore(flags);
return;
}
} else {
// Transfer complete on OUT
nb_trans = udd_udesc_get_buf0_ctn(ep_num);
// Lock reception of new OUT packet
udd_enable_busy_bank0(ep_num);
// Ack interrupt
udd_ack_out_received(ep_num);
udd_ack_fifocon(ep_num);
// Can be necessary to copy data receive from cache buffer to user buffer
if (ptr_job->b_use_out_cache_buffer) {
memcpy(&ptr_job->buf[ptr_job->nb_trans],
udd_ep_out_cache_buffer[ep_num - 1],
ptr_job->buf_size % ep_size);
}
// Update number of data transfered
ptr_job->nb_trans += nb_trans;
if (ptr_job->nb_trans > ptr_job->buf_size) {
ptr_job->nb_trans = ptr_job->buf_size;
}
// If all previous data requested are received and user buffer not full
// then need to receive other data
if ((nb_trans == udd_udesc_get_buf0_size(ep_num))
&& (ptr_job->nb_trans != ptr_job->buf_size)) {
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
- (UDD_ENDPOINT_MAX_TRANS % ep_size);
} else {
next_trans -= next_trans % ep_size;
}
udd_udesc_rst_buf0_ctn(ep_num);
if (next_trans < ep_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_num,
udd_ep_out_cache_buffer[ep_num-1]);
udd_udesc_set_buf0_size(ep_num, ep_size);
} else {
// Link the user buffer directly on USB hardware DMA
udd_udesc_set_buf0_addr(ep_num, &ptr_job->buf[ptr_job->nb_trans]);
udd_udesc_set_buf0_size(ep_num, next_trans);
}
// Start transfer
udd_disable_busy_bank0(ep_num);
// Enable interrupt
flags = cpu_irq_save();
udd_enable_out_received_interrupt(ep_num);
udd_enable_endpoint_interrupt(ep_num);
cpu_irq_restore(flags);
return;
}
}
// Job complete then call callback
ptr_job->busy = false;
if (NULL != ptr_job->call_trans) {
ptr_job->call_trans(UDD_EP_TRANSFER_OK, ptr_job->nb_trans, ep);
}
return;
}
static void udd_ep_finish_job(udd_ep_id_t ep, bool b_abort)
{
udd_ep_job_t *ptr_job;
uint16_t ep_size;
irqflags_t flags;
// Get job corresponding at endpoint
ptr_job = &udd_ep_job[ep - 1];
// Test if a pending transfer is running. If not, disabled interrupt.
if (!ptr_job->busy) {
flags = cpu_irq_save();
udd_disable_endpoint_interrupt(ep);
cpu_irq_restore(flags);
return;
}
if (Is_udd_endpoint_in(ep)) {
// Update number of data transfered
ptr_job->nb_trans = udd_udesc_get_buf0_size(ep);
if (0 == ptr_job->nb_trans) {
if (0 == udd_nb_busy_bank(ep)) {
// All byte are transfered than take nb byte requested
ptr_job->nb_trans = udd_udesc_get_buf0_ctn(ep);
}
}
} else {
// Transfer complete on OUT
ep_size = udd_format_endpoint_size(ep);
if (ptr_job->b_use_out_cache_buffer) {
// Copy data receiv from cache buffer to user buffer
memcpy(&ptr_job->buf[ptr_job->nb_trans],
udd_ep_out_cache_buffer[ep - 1],
ptr_job->buf_size % ep_size);
ptr_job->nb_trans += udd_udesc_get_buf0_ctn(ep);
} else {
ptr_job->nb_trans = udd_udesc_get_buf0_ctn(ep);
// If all previous data requested are received
// and user buffer not full
if ((ptr_job->nb_trans == udd_udesc_get_buf0_size(ep))
&& (ptr_job->nb_trans !=
ptr_job->buf_size)) {
// Use the cache buffer to receiv last data
// which can be more larger than user buffer remaining
ptr_job->b_use_out_cache_buffer = true;
udd_udesc_rst_buf0_ctn(ep);
udd_udesc_set_buf0_addr(ep,
udd_ep_out_cache_buffer[ep -
1]);
udd_udesc_set_buf0_size(ep, ep_size);
// Free buffer to accept another data to reception
udd_ack_out_received(ep);
udd_ack_fifocon(ep);
return;
}
}
// Free buffer but not accept another data to reception
udd_ack_out_received(ep);
udd_enable_busy_bank0(ep);
udd_ack_fifocon(ep);
}
// Call callback to signal end of transfer
flags = cpu_irq_save();
udd_disable_endpoint_interrupt(ep);
cpu_irq_restore(flags);
ptr_job->busy = false;
if (NULL == ptr_job->call_trans)
return; // No callback linked to job
ptr_job->call_trans((b_abort) ? UDD_EP_TRANSFER_ABORT :
UDD_EP_TRANSFER_OK, ptr_job->nb_trans);
}
