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sw: usb-epfifo: mostly-working commit

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Still has issues with large reads.

Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-03-10 22:42:14 +08:00
parent c180c1b1b8
commit d64f88d995
1 changed files with 76 additions and 45 deletions
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115
sw/src/usb-epfifo.c
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@ -73,10 +73,18 @@ static int current_to_send;
static int queue_more_data(int epnum) { static int queue_more_data(int epnum) {
(void)epnum; (void)epnum;
// Don't allow requeueing
// Don't allow requeueing -- only queue more data if we're
// currently set up to respond NAK.
if (usb_ep_0_in_respond_read() != EPF_NAK) if (usb_ep_0_in_respond_read() != EPF_NAK)
return -1; return -1;
// Prevent us from double-filling the buffer.
if (!usb_ep_0_in_ibuf_empty_read()) {
usb_ep_0_in_respond_write(EPF_ACK);
return -1;
}
int this_offset; int this_offset;
current_to_send = current_length - current_offset; current_to_send = current_length - current_offset;
if (current_to_send > max_byte_length) if (current_to_send > max_byte_length)
@ -94,21 +102,29 @@ int usb_send(struct usb_device *dev, int epnum, const void *data, int total_coun
// Don't allow requeueing // Don't allow requeueing
// if (usb_ep_0_in_respond_read() != EPF_NAK) // if (usb_ep_0_in_respond_read() != EPF_NAK)
// return -1; // return -1;
if (!usb_ep_0_in_ibuf_empty_read()) { // if (!usb_ep_0_in_ibuf_empty_read()) {
printf("IBUF isn't empty. Error? %d\n", usb_usb_transfer_error_state_read()); // printf("IBUF isn't empty.\n");
return -1; // return -1;
} // }
/*
while (!usb_ep_0_in_ibuf_empty_read()) {
printf("Emptying out ibuf...\n");
usb_ep_0_in_ibuf_head_read();
}
*/
current_data = (uint8_t *)data; current_data = (uint8_t *)data;
current_length = total_count; current_length = total_count;
current_offset = 0; current_offset = 0;
control_state = IN_DATA; control_state = IN_DATA;
queue_more_data(epnum); queue_more_data(epnum);
printf("Sending %d bytes to EP%d: [", total_count, epnum);
int i;
const uint8_t *u8data = data;
for (i = 0; i < total_count; i++) {
if (i)
printf(" ");
printf("%02x", u8data[i] & 0xff);
}
printf("]\n");
return 0; return 0;
} }
@ -127,37 +143,28 @@ void usb_isr(void) {
irq_count++; irq_count++;
uint8_t ep0o_pending = usb_ep_0_out_ev_pending_read(); uint8_t ep0o_pending = usb_ep_0_out_ev_pending_read();
uint8_t ep0i_pending = usb_ep_0_in_ev_pending_read(); uint8_t ep0i_pending = usb_ep_0_in_ev_pending_read();
printf(">> %02x %02x <<\n", ep0o_pending, ep0i_pending); // printf(">> %02x %02x <<\n", ep0o_pending, ep0i_pending);
// We got an OUT or a SETUP packet. Copy it to usb_ep0out_buffer // We got an OUT or a SETUP packet. Copy it to usb_ep0out_buffer
// and clear the "pending" bit. // and clear the "pending" bit.
if (ep0o_pending) { if (ep0o_pending) {
uint8_t last_tok = usb_ep_0_out_last_tok_read();
int byte_count = 0; int byte_count = 0;
usb_ep0out_last_tok[usb_ep0out_wr_ptr] = last_tok;
uint8_t *obuf = usb_ep0out_buffer[usb_ep0out_wr_ptr]; uint8_t *obuf = usb_ep0out_buffer[usb_ep0out_wr_ptr];
while (!usb_ep_0_out_obuf_empty_read()) { while (!usb_ep_0_out_obuf_empty_read()) {
obuf[byte_count++] = usb_ep_0_out_obuf_head_read(); obuf[byte_count++] = usb_ep_0_out_obuf_head_read();
usb_ep_0_out_obuf_head_write(0); usb_ep_0_out_obuf_head_write(0);
} }
usb_ep_0_out_ev_pending_write(ep0o_pending); usb_ep_0_out_ev_pending_write(ep0o_pending);
if (byte_count) {
printf("read %d bytes: [", byte_count);
unsigned int i;
for (i = 0; i < byte_count; i++) {
uart_write(' ');
uart_write(hex[(obuf[i] >> 4) & 0xf]);
uart_write(hex[obuf[i] & (0xf)]);
}
uart_write(' ]');
uart_write('\r');
uart_write('\n');
usb_ep0out_buffer_len[usb_ep0out_wr_ptr] = byte_count; usb_ep0out_buffer_len[usb_ep0out_wr_ptr] = byte_count;
usb_ep0out_wr_ptr = (usb_ep0out_wr_ptr + 1) & (EP0OUT_BUFFERS-1); usb_ep0out_wr_ptr = (usb_ep0out_wr_ptr + 1) & (EP0OUT_BUFFERS-1);
}
else { if (last_tok == 3 /*USB_PID_SETUP*/) {
printf("read no bytes\n"); current_offset = 0;
usb_ep_0_out_respond_write(EPF_ACK); current_length = 0;
current_data = NULL;
} }
} }
@ -176,6 +183,7 @@ void usb_isr(void) {
if (control_state == IN_DATA) { if (control_state == IN_DATA) {
usb_ep_0_out_respond_write(EPF_ACK); usb_ep_0_out_respond_write(EPF_ACK);
} }
usb_ep_0_out_respond_write(EPF_ACK);
} }
else else
usb_ep_0_in_respond_write(EPF_NAK); usb_ep_0_in_respond_write(EPF_NAK);
@ -210,32 +218,55 @@ int usb_recv(struct usb_device *dev, void *buffer, unsigned int buffer_len) {
void usb_poll(void) { void usb_poll(void) {
static int last_error_count; // static int last_error_count;
int this_error_count = usb_usb_transfer_error_state_read(); // int this_error_count = usb_usb_transfer_error_state_read();
if (last_error_count != this_error_count) { // if (last_error_count != this_error_count) {
printf("USB TRANSFER ERROR STATE # %d!! WaitHand? %d WaitData? %d PID: %02x (was: %02x, full: %02x)\n", this_error_count, usb_dbg_lwh_read(), usb_dbg_lwd_read(), usb_usb_transfer_o_pid_read(), usb_usb_transfer_error_pid_read(), usb_dbg_lfp_read()); // printf("USB TRANSFER ERROR STATE # %d!! WaitHand? %d WaitData? %d PID: %02x (was: %02x, full: %02x)\n", this_error_count, usb_dbg_lwh_read(), usb_dbg_lwd_read(), usb_usb_transfer_o_pid_read(), usb_usb_transfer_error_pid_read(), usb_dbg_lfp_read());
last_error_count = this_error_count; // last_error_count = this_error_count;
} // }
// If some data was received, then process it. // If some data was received, then process it.
if (usb_ep0out_rd_ptr != usb_ep0out_wr_ptr) { if (usb_ep0out_rd_ptr != usb_ep0out_wr_ptr) {
const struct usb_setup_request *request = (const struct usb_setup_request *)(usb_ep0out_buffer[usb_ep0out_rd_ptr]); const struct usb_setup_request *request = (const struct usb_setup_request *)(usb_ep0out_buffer[usb_ep0out_rd_ptr]);
const uint8_t *obuf = (const struct usb_setup_request *)(usb_ep0out_buffer[usb_ep0out_rd_ptr]);
if (usb_ep0out_last_tok[usb_ep0out_rd_ptr] == 3) {
usb_setup(NULL, request); usb_setup(NULL, request);
}
int byte_count = usb_ep0out_buffer_len[usb_ep0out_rd_ptr];
if (byte_count) {
printf("read %d %02x bytes: [", byte_count, usb_ep0out_last_tok[usb_ep0out_rd_ptr]);
unsigned int i;
for (i = 0; i < byte_count; i++) {
if (i)
uart_write(' ');
uart_write(hex[(obuf[i] >> 4) & 0xf]);
uart_write(hex[obuf[i] & (0xf)]);
}
uart_write(']');
uart_write('\r');
uart_write('\n');
}
else {
printf("read no bytes\n");
}
usb_ep0out_buffer_len[usb_ep0out_rd_ptr] = 0; usb_ep0out_buffer_len[usb_ep0out_rd_ptr] = 0;
usb_ep0out_rd_ptr = (usb_ep0out_rd_ptr + 1) & (EP0OUT_BUFFERS-1); usb_ep0out_rd_ptr = (usb_ep0out_rd_ptr + 1) & (EP0OUT_BUFFERS-1);
} }
if ((usb_ep_0_in_respond_read() == EPF_NAK) && (current_data)) if ((usb_ep_0_in_respond_read() == EPF_NAK) && (current_data)) {
current_offset += current_to_send;
queue_more_data(0); queue_more_data(0);
}
// Cancel any pending transfers // Cancel any pending transfers
if ((control_state == IN_DATA) && usb_ep_0_in_ibuf_empty_read()) { // if ((control_state == IN_DATA) && usb_ep_0_in_ibuf_empty_read()) {
printf("state is IN_DATA but ibuf is empty?\n"); // printf("state is IN_DATA but ibuf is empty?\n");
usb_ack(NULL, 0); // usb_ack(NULL, 0);
printf("and obuf_empty_read(): %d\n", usb_ep_0_out_obuf_empty_read()); // printf("and obuf_empty_read(): %d\n", usb_ep_0_out_obuf_empty_read());
usb_ep_0_out_obuf_head_write(0); // usb_ep_0_out_obuf_head_write(0);
control_state = WAIT_SETUP; // control_state = WAIT_SETUP;
} // }
// if (!usb_ep_0_out_obuf_empty_read()) { // if (!usb_ep_0_out_obuf_empty_read()) {
// printf("FATAL: obuf not empty, and pending is %d\n", usb_ep_0_out_ev_pending_read()); // printf("FATAL: obuf not empty, and pending is %d\n", usb_ep_0_out_ev_pending_read());
// printf("HALT"); // printf("HALT");