console.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/usb.h>
#include "ehci_debug.h"
 
static void usbdebug_tx_byte(struct dbgp_pipe *pipe, unsigned char data)
{
        if (!dbgp_try_get(pipe))
                return;
        pipe->buf[pipe->bufidx++] = data;
        if (pipe->bufidx >= 8) {
                dbgp_bulk_write_x(pipe, pipe->buf, pipe->bufidx);
                pipe->bufidx = 0;
        }
        dbgp_put(pipe);
}
 
static void usbdebug_tx_flush(struct dbgp_pipe *pipe)
{
        if (!dbgp_try_get(pipe))
                return;
        if (pipe->bufidx > 0) {
                dbgp_bulk_write_x(pipe, pipe->buf, pipe->bufidx);
                pipe->bufidx = 0;
        }
        dbgp_put(pipe);
}
 
static unsigned char usbdebug_rx_byte(struct dbgp_pipe *pipe)
{
        unsigned char data = 0xff;
        if (!dbgp_try_get(pipe))
                return 0xff;
        while (pipe->bufidx >= pipe->buflen) {
                pipe->buflen = 0;
                pipe->bufidx = 0;
                int count = dbgp_bulk_read_x(pipe, pipe->buf, 8);
                if (count>0)
                        pipe->buflen = count;
        }
        data = pipe->buf[pipe->bufidx++];
        dbgp_put(pipe);
        return data;
}
 
void usb_tx_byte(int idx, unsigned char data)
{
        usbdebug_tx_byte(dbgp_console_output(), data);
}
 
void usb_tx_flush(int idx)
{
        usbdebug_tx_flush(dbgp_console_output());
}
 
unsigned char usb_rx_byte(int idx)
{
        return usbdebug_rx_byte(dbgp_console_input());
}
 
int usb_can_rx_byte(int idx)
{
        return dbgp_ep_is_active(dbgp_console_input());
}