/**
* Put an RGMII interface in loopback mode. Internal packets sent
* out will be received back again on the same port. Externally
* received packets will echo back out.
*
* @param port IPD port number to loop.
*/
void cvmx_helper_rgmii_internal_loopback(int port)
{
int interface = (port >> 4) & 1;
int index = port & 0xf;
uint64_t tmp;
cvmx_gmxx_prtx_cfg_t gmx_cfg;
gmx_cfg.u64 = 0;
gmx_cfg.s.duplex = 1;
gmx_cfg.s.slottime = 1;
gmx_cfg.s.speed = 1;
cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 1);
cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x200);
cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0x2000);
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
tmp = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface));
cvmx_write_csr(CVMX_ASXX_PRT_LOOP(interface), (1 << index) | tmp);
tmp = cvmx_read_csr(CVMX_ASXX_TX_PRT_EN(interface));
cvmx_write_csr(CVMX_ASXX_TX_PRT_EN(interface), (1 << index) | tmp);
tmp = cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface));
cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), (1 << index) | tmp);
gmx_cfg.s.en = 1;
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
}
/**
* Return the link state of an IPD/PKO port as returned by
* auto negotiation. The result of this function may not match
* Octeon's link config if auto negotiation has changed since
* the last call to cvmx_helper_link_set().
*
* @ipd_port: IPD/PKO port to query
*
* Returns Link state
*/
cvmx_helper_link_info_t __cvmx_helper_rgmii_link_get(int ipd_port)
{
int interface = cvmx_helper_get_interface_num(ipd_port);
int index = cvmx_helper_get_interface_index_num(ipd_port);
union cvmx_asxx_prt_loop asxx_prt_loop;
asxx_prt_loop.u64 = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface));
if (asxx_prt_loop.s.int_loop & (1 << index)) {
/* Force 1Gbps full duplex on internal loopback */
cvmx_helper_link_info_t result;
result.u64 = 0;
result.s.full_duplex = 1;
result.s.link_up = 1;
result.s.speed = 1000;
return result;
} else
return __cvmx_helper_board_link_get(ipd_port);
}
