diff options
Diffstat (limited to 'drivers/staging/octeon/cvmx-helper-sgmii.c')
| -rw-r--r-- | drivers/staging/octeon/cvmx-helper-sgmii.c | 550 |
1 files changed, 0 insertions, 550 deletions
diff --git a/drivers/staging/octeon/cvmx-helper-sgmii.c b/drivers/staging/octeon/cvmx-helper-sgmii.c deleted file mode 100644 index 6214e3b6d97..00000000000 --- a/drivers/staging/octeon/cvmx-helper-sgmii.c +++ /dev/null @@ -1,550 +0,0 @@ -/***********************license start*************** - * Author: Cavium Networks - * - * Contact: support@caviumnetworks.com - * This file is part of the OCTEON SDK - * - * Copyright (c) 2003-2008 Cavium Networks - * - * This file is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License, Version 2, as - * published by the Free Software Foundation. - * - * This file is distributed in the hope that it will be useful, but - * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty - * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or - * NONINFRINGEMENT. See the GNU General Public License for more - * details. - * - * You should have received a copy of the GNU General Public License - * along with this file; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - * or visit http://www.gnu.org/licenses/. - * - * This file may also be available under a different license from Cavium. - * Contact Cavium Networks for more information - ***********************license end**************************************/ - -/* - * Functions for SGMII initialization, configuration, - * and monitoring. - */ - -#include <asm/octeon/octeon.h> - -#include "cvmx-config.h" - -#include "cvmx-mdio.h" -#include "cvmx-helper.h" -#include "cvmx-helper-board.h" - -#include "cvmx-gmxx-defs.h" -#include "cvmx-pcsx-defs.h" - -void __cvmx_interrupt_gmxx_enable(int interface); -void __cvmx_interrupt_pcsx_intx_en_reg_enable(int index, int block); -void __cvmx_interrupt_pcsxx_int_en_reg_enable(int index); - -/** - * Perform initialization required only once for an SGMII port. - * - * @interface: Interface to init - * @index: Index of prot on the interface - * - * Returns Zero on success, negative on failure - */ -static int __cvmx_helper_sgmii_hardware_init_one_time(int interface, int index) -{ - const uint64_t clock_mhz = cvmx_sysinfo_get()->cpu_clock_hz / 1000000; - union cvmx_pcsx_miscx_ctl_reg pcs_misc_ctl_reg; - union cvmx_pcsx_linkx_timer_count_reg pcsx_linkx_timer_count_reg; - union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg; - - /* Disable GMX */ - gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); - gmxx_prtx_cfg.s.en = 0; - cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64); - - /* - * Write PCS*_LINK*_TIMER_COUNT_REG[COUNT] with the - * appropriate value. 1000BASE-X specifies a 10ms - * interval. SGMII specifies a 1.6ms interval. - */ - pcs_misc_ctl_reg.u64 = - cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); - pcsx_linkx_timer_count_reg.u64 = - cvmx_read_csr(CVMX_PCSX_LINKX_TIMER_COUNT_REG(index, interface)); - if (pcs_misc_ctl_reg.s.mode) { - /* 1000BASE-X */ - pcsx_linkx_timer_count_reg.s.count = - (10000ull * clock_mhz) >> 10; - } else { - /* SGMII */ - pcsx_linkx_timer_count_reg.s.count = - (1600ull * clock_mhz) >> 10; - } - cvmx_write_csr(CVMX_PCSX_LINKX_TIMER_COUNT_REG(index, interface), - pcsx_linkx_timer_count_reg.u64); - - /* - * Write the advertisement register to be used as the - * tx_Config_Reg<D15:D0> of the autonegotiation. In - * 1000BASE-X mode, tx_Config_Reg<D15:D0> is PCS*_AN*_ADV_REG. - * In SGMII PHY mode, tx_Config_Reg<D15:D0> is - * PCS*_SGM*_AN_ADV_REG. In SGMII MAC mode, - * tx_Config_Reg<D15:D0> is the fixed value 0x4001, so this - * step can be skipped. - */ - if (pcs_misc_ctl_reg.s.mode) { - /* 1000BASE-X */ - union cvmx_pcsx_anx_adv_reg pcsx_anx_adv_reg; - pcsx_anx_adv_reg.u64 = - cvmx_read_csr(CVMX_PCSX_ANX_ADV_REG(index, interface)); - pcsx_anx_adv_reg.s.rem_flt = 0; - pcsx_anx_adv_reg.s.pause = 3; - pcsx_anx_adv_reg.s.hfd = 1; - pcsx_anx_adv_reg.s.fd = 1; - cvmx_write_csr(CVMX_PCSX_ANX_ADV_REG(index, interface), - pcsx_anx_adv_reg.u64); - } else { - union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg; - pcsx_miscx_ctl_reg.u64 = - cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); - if (pcsx_miscx_ctl_reg.s.mac_phy) { - /* PHY Mode */ - union cvmx_pcsx_sgmx_an_adv_reg pcsx_sgmx_an_adv_reg; - pcsx_sgmx_an_adv_reg.u64 = - cvmx_read_csr(CVMX_PCSX_SGMX_AN_ADV_REG - (index, interface)); - pcsx_sgmx_an_adv_reg.s.link = 1; - pcsx_sgmx_an_adv_reg.s.dup = 1; - pcsx_sgmx_an_adv_reg.s.speed = 2; - cvmx_write_csr(CVMX_PCSX_SGMX_AN_ADV_REG - (index, interface), - pcsx_sgmx_an_adv_reg.u64); - } else { - /* MAC Mode - Nothing to do */ - } - } - return 0; -} - -/** - * Initialize the SERTES link for the first time or after a loss - * of link. - * - * @interface: Interface to init - * @index: Index of prot on the interface - * - * Returns Zero on success, negative on failure - */ -static int __cvmx_helper_sgmii_hardware_init_link(int interface, int index) -{ - union cvmx_pcsx_mrx_control_reg control_reg; - - /* - * Take PCS through a reset sequence. - * PCS*_MR*_CONTROL_REG[PWR_DN] should be cleared to zero. - * Write PCS*_MR*_CONTROL_REG[RESET]=1 (while not changing the - * value of the other PCS*_MR*_CONTROL_REG bits). Read - * PCS*_MR*_CONTROL_REG[RESET] until it changes value to - * zero. - */ - control_reg.u64 = - cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface)); - if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) { - control_reg.s.reset = 1; - cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), - control_reg.u64); - if (CVMX_WAIT_FOR_FIELD64 - (CVMX_PCSX_MRX_CONTROL_REG(index, interface), - union cvmx_pcsx_mrx_control_reg, reset, ==, 0, 10000)) { - cvmx_dprintf("SGMII%d: Timeout waiting for port %d " - "to finish reset\n", - interface, index); - return -1; - } - } - - /* - * Write PCS*_MR*_CONTROL_REG[RST_AN]=1 to ensure a fresh - * sgmii negotiation starts. - */ - control_reg.s.rst_an = 1; - control_reg.s.an_en = 1; - control_reg.s.pwr_dn = 0; - cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), - control_reg.u64); - - /* - * Wait for PCS*_MR*_STATUS_REG[AN_CPT] to be set, indicating - * that sgmii autonegotiation is complete. In MAC mode this - * isn't an ethernet link, but a link between Octeon and the - * PHY. - */ - if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) && - CVMX_WAIT_FOR_FIELD64(CVMX_PCSX_MRX_STATUS_REG(index, interface), - union cvmx_pcsx_mrx_status_reg, an_cpt, ==, 1, - 10000)) { - /* cvmx_dprintf("SGMII%d: Port %d link timeout\n", interface, index); */ - return -1; - } - return 0; -} - -/** - * Configure an SGMII link to the specified speed after the SERTES - * link is up. - * - * @interface: Interface to init - * @index: Index of prot on the interface - * @link_info: Link state to configure - * - * Returns Zero on success, negative on failure - */ -static int __cvmx_helper_sgmii_hardware_init_link_speed(int interface, - int index, - cvmx_helper_link_info_t - link_info) -{ - int is_enabled; - union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg; - union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg; - - /* Disable GMX before we make any changes. Remember the enable state */ - gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); - is_enabled = gmxx_prtx_cfg.s.en; - gmxx_prtx_cfg.s.en = 0; - cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64); - - /* Wait for GMX to be idle */ - if (CVMX_WAIT_FOR_FIELD64 - (CVMX_GMXX_PRTX_CFG(index, interface), union cvmx_gmxx_prtx_cfg, - rx_idle, ==, 1, 10000) - || CVMX_WAIT_FOR_FIELD64(CVMX_GMXX_PRTX_CFG(index, interface), - union cvmx_gmxx_prtx_cfg, tx_idle, ==, 1, - 10000)) { - cvmx_dprintf - ("SGMII%d: Timeout waiting for port %d to be idle\n", - interface, index); - return -1; - } - - /* Read GMX CFG again to make sure the disable completed */ - gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); - - /* - * Get the misc control for PCS. We will need to set the - * duplication amount. - */ - pcsx_miscx_ctl_reg.u64 = - cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); - - /* - * Use GMXENO to force the link down if the status we get says - * it should be down. - */ - pcsx_miscx_ctl_reg.s.gmxeno = !link_info.s.link_up; - - /* Only change the duplex setting if the link is up */ - if (link_info.s.link_up) - gmxx_prtx_cfg.s.duplex = link_info.s.full_duplex; - - /* Do speed based setting for GMX */ - switch (link_info.s.speed) { - case 10: - gmxx_prtx_cfg.s.speed = 0; - gmxx_prtx_cfg.s.speed_msb = 1; - gmxx_prtx_cfg.s.slottime = 0; - /* Setting from GMX-603 */ - pcsx_miscx_ctl_reg.s.samp_pt = 25; - cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 64); - cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0); - break; - case 100: - gmxx_prtx_cfg.s.speed = 0; - gmxx_prtx_cfg.s.speed_msb = 0; - gmxx_prtx_cfg.s.slottime = 0; - pcsx_miscx_ctl_reg.s.samp_pt = 0x5; - cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 64); - cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0); - break; - case 1000: - gmxx_prtx_cfg.s.speed = 1; - gmxx_prtx_cfg.s.speed_msb = 0; - gmxx_prtx_cfg.s.slottime = 1; - pcsx_miscx_ctl_reg.s.samp_pt = 1; - cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 512); - cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 8192); - break; - default: - break; - } - - /* Write the new misc control for PCS */ - cvmx_write_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface), - pcsx_miscx_ctl_reg.u64); - - /* Write the new GMX settings with the port still disabled */ - cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64); - - /* Read GMX CFG again to make sure the config completed */ - gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); - - /* Restore the enabled / disabled state */ - gmxx_prtx_cfg.s.en = is_enabled; - cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64); - - return 0; -} - -/** - * Bring up the SGMII interface to be ready for packet I/O but - * leave I/O disabled using the GMX override. This function - * follows the bringup documented in 10.6.3 of the manual. - * - * @interface: Interface to bringup - * @num_ports: Number of ports on the interface - * - * Returns Zero on success, negative on failure - */ -static int __cvmx_helper_sgmii_hardware_init(int interface, int num_ports) -{ - int index; - - __cvmx_helper_setup_gmx(interface, num_ports); - - for (index = 0; index < num_ports; index++) { - int ipd_port = cvmx_helper_get_ipd_port(interface, index); - __cvmx_helper_sgmii_hardware_init_one_time(interface, index); - __cvmx_helper_sgmii_link_set(ipd_port, - __cvmx_helper_sgmii_link_get - (ipd_port)); - - } - - return 0; -} - -/** - * Probe a SGMII interface and determine the number of ports - * connected to it. The SGMII interface should still be down after - * this call. - * - * @interface: Interface to probe - * - * Returns Number of ports on the interface. Zero to disable. - */ -int __cvmx_helper_sgmii_probe(int interface) -{ - union cvmx_gmxx_inf_mode mode; - - /* - * Due to errata GMX-700 on CN56XXp1.x and CN52XXp1.x, the - * interface needs to be enabled before IPD otherwise per port - * backpressure may not work properly - */ - mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); - mode.s.en = 1; - cvmx_write_csr(CVMX_GMXX_INF_MODE(interface), mode.u64); - return 4; -} - -/** - * Bringup and enable a SGMII interface. After this call packet - * I/O should be fully functional. This is called with IPD - * enabled but PKO disabled. - * - * @interface: Interface to bring up - * - * Returns Zero on success, negative on failure - */ -int __cvmx_helper_sgmii_enable(int interface) -{ - int num_ports = cvmx_helper_ports_on_interface(interface); - int index; - - __cvmx_helper_sgmii_hardware_init(interface, num_ports); - - for (index = 0; index < num_ports; index++) { - union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg; - gmxx_prtx_cfg.u64 = - cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); - gmxx_prtx_cfg.s.en = 1; - cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), - gmxx_prtx_cfg.u64); - __cvmx_interrupt_pcsx_intx_en_reg_enable(index, interface); - } - __cvmx_interrupt_pcsxx_int_en_reg_enable(interface); - __cvmx_interrupt_gmxx_enable(interface); - return 0; -} - -/** - * 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_sgmii_link_get(int ipd_port) -{ - cvmx_helper_link_info_t result; - union cvmx_pcsx_miscx_ctl_reg pcs_misc_ctl_reg; - int interface = cvmx_helper_get_interface_num(ipd_port); - int index = cvmx_helper_get_interface_index_num(ipd_port); - union cvmx_pcsx_mrx_control_reg pcsx_mrx_control_reg; - - result.u64 = 0; - - if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) { - /* The simulator gives you a simulated 1Gbps full duplex link */ - result.s.link_up = 1; - result.s.full_duplex = 1; - result.s.speed = 1000; - return result; - } - - pcsx_mrx_control_reg.u64 = - cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface)); - if (pcsx_mrx_control_reg.s.loopbck1) { - /* Force 1Gbps full duplex link for internal loopback */ - result.s.link_up = 1; - result.s.full_duplex = 1; - result.s.speed = 1000; - return result; - } - - pcs_misc_ctl_reg.u64 = - cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); - if (pcs_misc_ctl_reg.s.mode) { - /* 1000BASE-X */ - /* FIXME */ - } else { - union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg; - pcsx_miscx_ctl_reg.u64 = - cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); - if (pcsx_miscx_ctl_reg.s.mac_phy) { - /* PHY Mode */ - union cvmx_pcsx_mrx_status_reg pcsx_mrx_status_reg; - union cvmx_pcsx_anx_results_reg pcsx_anx_results_reg; - - /* - * Don't bother continuing if the SERTES low - * level link is down - */ - pcsx_mrx_status_reg.u64 = - cvmx_read_csr(CVMX_PCSX_MRX_STATUS_REG - (index, interface)); - if (pcsx_mrx_status_reg.s.lnk_st == 0) { - if (__cvmx_helper_sgmii_hardware_init_link - (interface, index) != 0) - return result; - } - - /* Read the autoneg results */ - pcsx_anx_results_reg.u64 = - cvmx_read_csr(CVMX_PCSX_ANX_RESULTS_REG - (index, interface)); - if (pcsx_anx_results_reg.s.an_cpt) { - /* - * Auto negotiation is complete. Set - * status accordingly. - */ - result.s.full_duplex = - pcsx_anx_results_reg.s.dup; - result.s.link_up = - pcsx_anx_results_reg.s.link_ok; - switch (pcsx_anx_results_reg.s.spd) { - case 0: - result.s.speed = 10; - break; - case 1: - result.s.speed = 100; - break; - case 2: - result.s.speed = 1000; - break; - default: - result.s.speed = 0; - result.s.link_up = 0; - break; - } - } else { - /* - * Auto negotiation isn't - * complete. Return link down. - */ - result.s.speed = 0; - result.s.link_up = 0; - } - } else { /* MAC Mode */ - - result = __cvmx_helper_board_link_get(ipd_port); - } - } - return result; -} - -/** - * Configure an IPD/PKO port for the specified link state. This - * function does not influence auto negotiation at the PHY level. - * The passed link state must always match the link state returned - * by cvmx_helper_link_get(). It is normally best to use - * cvmx_helper_link_autoconf() instead. - * - * @ipd_port: IPD/PKO port to configure - * @link_info: The new link state - * - * Returns Zero on success, negative on failure - */ -int __cvmx_helper_sgmii_link_set(int ipd_port, - cvmx_helper_link_info_t link_info) -{ - int interface = cvmx_helper_get_interface_num(ipd_port); - int index = cvmx_helper_get_interface_index_num(ipd_port); - __cvmx_helper_sgmii_hardware_init_link(interface, index); - return __cvmx_helper_sgmii_hardware_init_link_speed(interface, index, - link_info); -} - -/** - * Configure a port for internal and/or external loopback. Internal - * loopback causes packets sent by the port to be received by - * Octeon. External loopback causes packets received from the wire to - * sent out again. - * - * @ipd_port: IPD/PKO port to loopback. - * @enable_internal: - * Non zero if you want internal loopback - * @enable_external: - * Non zero if you want external loopback - * - * Returns Zero on success, negative on failure. - */ -int __cvmx_helper_sgmii_configure_loopback(int ipd_port, int enable_internal, - int enable_external) -{ - int interface = cvmx_helper_get_interface_num(ipd_port); - int index = cvmx_helper_get_interface_index_num(ipd_port); - union cvmx_pcsx_mrx_control_reg pcsx_mrx_control_reg; - union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg; - - pcsx_mrx_control_reg.u64 = - cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface)); - pcsx_mrx_control_reg.s.loopbck1 = enable_internal; - cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), - pcsx_mrx_control_reg.u64); - - pcsx_miscx_ctl_reg.u64 = - cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface)); - pcsx_miscx_ctl_reg.s.loopbck2 = enable_external; - cvmx_write_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface), - pcsx_miscx_ctl_reg.u64); - - __cvmx_helper_sgmii_hardware_init_link(interface, index); - return 0; -} |