static int udbg_getc_pollLP(void)
{
/* The interface is tricky because it may return up to 16 chars.
* We save them statically for future calls to udbg_getc().
*/
char ch, *buf = (char *)inbuf;
int i;
long rc;
if (inbuflen == 0) {
/* get some more chars. */
inbuflen = 0;
rc = plpar_get_term_char(vtermno, &inbuflen, buf);
if (rc != H_Success)
inbuflen = 0; /* otherwise inbuflen is garbage */
}
if (inbuflen <= 0 || inbuflen > 16) {
/* Catch error case as well as other oddities (corruption) */
inbuflen = 0;
return -1;
}
ch = buf[0];
for (i = 1; i < inbuflen; i++) /* shuffle them down. */
buf[i-1] = buf[i];
inbuflen--;
return ch;
}
/**
* hvc_get_chars - retrieve characters from firmware for denoted vterm adatper
* @vtermno: The vtermno or unit_address of the adapter from which to fetch the
* data.
* @buf: The character buffer into which to put the character data fetched from
* firmware.
* @count: not used?
*/
int hvc_get_chars(uint32_t vtermno, char *buf, int count)
{
unsigned long got;
if (plpar_get_term_char(vtermno, &got, buf) == H_SUCCESS)
return got;
return 0;
}