diff options
Diffstat (limited to 'drivers/staging/octeon/cvmx-helper-rgmii.c')
| -rw-r--r-- | drivers/staging/octeon/cvmx-helper-rgmii.c | 525 |
1 files changed, 0 insertions, 525 deletions
diff --git a/drivers/staging/octeon/cvmx-helper-rgmii.c b/drivers/staging/octeon/cvmx-helper-rgmii.c deleted file mode 100644 index aa2d5d7fee2b..000000000000 --- a/drivers/staging/octeon/cvmx-helper-rgmii.c +++ /dev/null @@ -1,525 +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 RGMII/GMII/MII initialization, configuration, - * and monitoring. - */ -#include <asm/octeon/octeon.h> - -#include "cvmx-config.h" - - -#include "cvmx-mdio.h" -#include "cvmx-pko.h" -#include "cvmx-helper.h" -#include "cvmx-helper-board.h" - -#include <asm/octeon/cvmx-npi-defs.h> -#include "cvmx-gmxx-defs.h" -#include "cvmx-asxx-defs.h" -#include "cvmx-dbg-defs.h" - -void __cvmx_interrupt_gmxx_enable(int interface); -void __cvmx_interrupt_asxx_enable(int block); - -/** - * Probe RGMII ports and determine the number present - * - * @interface: Interface to probe - * - * Returns Number of RGMII/GMII/MII ports (0-4). - */ -int __cvmx_helper_rgmii_probe(int interface) -{ - int num_ports = 0; - union cvmx_gmxx_inf_mode mode; - mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); - - if (mode.s.type) { - if (OCTEON_IS_MODEL(OCTEON_CN38XX) - || OCTEON_IS_MODEL(OCTEON_CN58XX)) { - cvmx_dprintf("ERROR: RGMII initialize called in " - "SPI interface\n"); - } else if (OCTEON_IS_MODEL(OCTEON_CN31XX) - || OCTEON_IS_MODEL(OCTEON_CN30XX) - || OCTEON_IS_MODEL(OCTEON_CN50XX)) { - /* - * On these chips "type" says we're in - * GMII/MII mode. This limits us to 2 ports - */ - num_ports = 2; - } else { - cvmx_dprintf("ERROR: Unsupported Octeon model in %s\n", - __func__); - } - } else { - if (OCTEON_IS_MODEL(OCTEON_CN38XX) - || OCTEON_IS_MODEL(OCTEON_CN58XX)) { - num_ports = 4; - } else if (OCTEON_IS_MODEL(OCTEON_CN31XX) - || OCTEON_IS_MODEL(OCTEON_CN30XX) - || OCTEON_IS_MODEL(OCTEON_CN50XX)) { - num_ports = 3; - } else { - cvmx_dprintf("ERROR: Unsupported Octeon model in %s\n", - __func__); - } - } - return num_ports; -} - -/** - * 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. - * - * @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; - - union cvmx_gmxx_prtx_cfg 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); -} - -/** - * Workaround ASX setup errata with CN38XX pass1 - * - * @interface: Interface to setup - * @port: Port to setup (0..3) - * @cpu_clock_hz: - * Chip frequency in Hertz - * - * Returns Zero on success, negative on failure - */ -static int __cvmx_helper_errata_asx_pass1(int interface, int port, - int cpu_clock_hz) -{ - /* Set hi water mark as per errata GMX-4 */ - if (cpu_clock_hz >= 325000000 && cpu_clock_hz < 375000000) - cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 12); - else if (cpu_clock_hz >= 375000000 && cpu_clock_hz < 437000000) - cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 11); - else if (cpu_clock_hz >= 437000000 && cpu_clock_hz < 550000000) - cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 10); - else if (cpu_clock_hz >= 550000000 && cpu_clock_hz < 687000000) - cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 9); - else - cvmx_dprintf("Illegal clock frequency (%d). " - "CVMX_ASXX_TX_HI_WATERX not set\n", cpu_clock_hz); - return 0; -} - -/** - * Configure all of the ASX, GMX, and PKO regsiters required - * to get RGMII to function on the supplied interface. - * - * @interface: PKO Interface to configure (0 or 1) - * - * Returns Zero on success - */ -int __cvmx_helper_rgmii_enable(int interface) -{ - int num_ports = cvmx_helper_ports_on_interface(interface); - int port; - struct cvmx_sysinfo *sys_info_ptr = cvmx_sysinfo_get(); - union cvmx_gmxx_inf_mode mode; - union cvmx_asxx_tx_prt_en asx_tx; - union cvmx_asxx_rx_prt_en asx_rx; - - mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); - - if (mode.s.en == 0) - return -1; - if ((OCTEON_IS_MODEL(OCTEON_CN38XX) || - OCTEON_IS_MODEL(OCTEON_CN58XX)) && mode.s.type == 1) - /* Ignore SPI interfaces */ - return -1; - - /* Configure the ASX registers needed to use the RGMII ports */ - asx_tx.u64 = 0; - asx_tx.s.prt_en = cvmx_build_mask(num_ports); - cvmx_write_csr(CVMX_ASXX_TX_PRT_EN(interface), asx_tx.u64); - - asx_rx.u64 = 0; - asx_rx.s.prt_en = cvmx_build_mask(num_ports); - cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), asx_rx.u64); - - /* Configure the GMX registers needed to use the RGMII ports */ - for (port = 0; port < num_ports; port++) { - /* Setting of CVMX_GMXX_TXX_THRESH has been moved to - __cvmx_helper_setup_gmx() */ - - if (cvmx_octeon_is_pass1()) - __cvmx_helper_errata_asx_pass1(interface, port, - sys_info_ptr-> - cpu_clock_hz); - else { - /* - * Configure more flexible RGMII preamble - * checking. Pass 1 doesn't support this - * feature. - */ - union cvmx_gmxx_rxx_frm_ctl frm_ctl; - frm_ctl.u64 = - cvmx_read_csr(CVMX_GMXX_RXX_FRM_CTL - (port, interface)); - /* New field, so must be compile time */ - frm_ctl.s.pre_free = 1; - cvmx_write_csr(CVMX_GMXX_RXX_FRM_CTL(port, interface), - frm_ctl.u64); - } - - /* - * Each pause frame transmitted will ask for about 10M - * bit times before resume. If buffer space comes - * available before that time has expired, an XON - * pause frame (0 time) will be transmitted to restart - * the flow. - */ - cvmx_write_csr(CVMX_GMXX_TXX_PAUSE_PKT_TIME(port, interface), - 20000); - cvmx_write_csr(CVMX_GMXX_TXX_PAUSE_PKT_INTERVAL - (port, interface), 19000); - - if (OCTEON_IS_MODEL(OCTEON_CN50XX)) { - cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface), - 16); - cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, interface), - 16); - } else { - cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface), - 24); - cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, interface), - 24); - } - } - - __cvmx_helper_setup_gmx(interface, num_ports); - - /* enable the ports now */ - for (port = 0; port < num_ports; port++) { - union cvmx_gmxx_prtx_cfg gmx_cfg; - cvmx_helper_link_autoconf(cvmx_helper_get_ipd_port - (interface, port)); - gmx_cfg.u64 = - cvmx_read_csr(CVMX_GMXX_PRTX_CFG(port, interface)); - gmx_cfg.s.en = 1; - cvmx_write_csr(CVMX_GMXX_PRTX_CFG(port, interface), - gmx_cfg.u64); - } - __cvmx_interrupt_asxx_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_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); -} - -/** - * 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_rgmii_link_set(int ipd_port, - cvmx_helper_link_info_t link_info) -{ - int result = 0; - int interface = cvmx_helper_get_interface_num(ipd_port); - int index = cvmx_helper_get_interface_index_num(ipd_port); - union cvmx_gmxx_prtx_cfg original_gmx_cfg; - union cvmx_gmxx_prtx_cfg new_gmx_cfg; - union cvmx_pko_mem_queue_qos pko_mem_queue_qos; - union cvmx_pko_mem_queue_qos pko_mem_queue_qos_save[16]; - union cvmx_gmxx_tx_ovr_bp gmx_tx_ovr_bp; - union cvmx_gmxx_tx_ovr_bp gmx_tx_ovr_bp_save; - int i; - - /* Ignore speed sets in the simulator */ - if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) - return 0; - - /* Read the current settings so we know the current enable state */ - original_gmx_cfg.u64 = - cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); - new_gmx_cfg = original_gmx_cfg; - - /* Disable the lowest level RX */ - cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), - cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface)) & - ~(1 << index)); - - /* Disable all queues so that TX should become idle */ - for (i = 0; i < cvmx_pko_get_num_queues(ipd_port); i++) { - int queue = cvmx_pko_get_base_queue(ipd_port) + i; - cvmx_write_csr(CVMX_PKO_REG_READ_IDX, queue); - pko_mem_queue_qos.u64 = cvmx_read_csr(CVMX_PKO_MEM_QUEUE_QOS); - pko_mem_queue_qos.s.pid = ipd_port; - pko_mem_queue_qos.s.qid = queue; - pko_mem_queue_qos_save[i] = pko_mem_queue_qos; - pko_mem_queue_qos.s.qos_mask = 0; - cvmx_write_csr(CVMX_PKO_MEM_QUEUE_QOS, pko_mem_queue_qos.u64); - } - - /* Disable backpressure */ - gmx_tx_ovr_bp.u64 = cvmx_read_csr(CVMX_GMXX_TX_OVR_BP(interface)); - gmx_tx_ovr_bp_save = gmx_tx_ovr_bp; - gmx_tx_ovr_bp.s.bp &= ~(1 << index); - gmx_tx_ovr_bp.s.en |= 1 << index; - cvmx_write_csr(CVMX_GMXX_TX_OVR_BP(interface), gmx_tx_ovr_bp.u64); - cvmx_read_csr(CVMX_GMXX_TX_OVR_BP(interface)); - - /* - * Poll the GMX state machine waiting for it to become - * idle. Preferably we should only change speed when it is - * idle. If it doesn't become idle we will still do the speed - * change, but there is a slight chance that GMX will - * lockup. - */ - cvmx_write_csr(CVMX_NPI_DBG_SELECT, - interface * 0x800 + index * 0x100 + 0x880); - CVMX_WAIT_FOR_FIELD64(CVMX_DBG_DATA, union cvmx_dbg_data, data & 7, - ==, 0, 10000); - CVMX_WAIT_FOR_FIELD64(CVMX_DBG_DATA, union cvmx_dbg_data, data & 0xf, - ==, 0, 10000); - - /* Disable the port before we make any changes */ - new_gmx_cfg.s.en = 0; - cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64); - cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); - - /* Set full/half duplex */ - if (cvmx_octeon_is_pass1()) - /* Half duplex is broken for 38XX Pass 1 */ - new_gmx_cfg.s.duplex = 1; - else if (!link_info.s.link_up) - /* Force full duplex on down links */ - new_gmx_cfg.s.duplex = 1; - else - new_gmx_cfg.s.duplex = link_info.s.full_duplex; - - /* Set the link speed. Anything unknown is set to 1Gbps */ - if (link_info.s.speed == 10) { - new_gmx_cfg.s.slottime = 0; - new_gmx_cfg.s.speed = 0; - } else if (link_info.s.speed == 100) { - new_gmx_cfg.s.slottime = 0; - new_gmx_cfg.s.speed = 0; - } else { - new_gmx_cfg.s.slottime = 1; - new_gmx_cfg.s.speed = 1; - } - - /* Adjust the clocks */ - if (link_info.s.speed == 10) { - cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 50); - cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x40); - cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0); - } else if (link_info.s.speed == 100) { - cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 5); - cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x40); - cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0); - } else { - 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); - } - - if (OCTEON_IS_MODEL(OCTEON_CN30XX) || OCTEON_IS_MODEL(OCTEON_CN50XX)) { - if ((link_info.s.speed == 10) || (link_info.s.speed == 100)) { - union cvmx_gmxx_inf_mode mode; - mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); - - /* - * Port .en .type .p0mii Configuration - * ---- --- ----- ------ ----------------------------------------- - * X 0 X X All links are disabled. - * 0 1 X 0 Port 0 is RGMII - * 0 1 X 1 Port 0 is MII - * 1 1 0 X Ports 1 and 2 are configured as RGMII ports. - * 1 1 1 X Port 1: GMII/MII; Port 2: disabled. GMII or - * MII port is selected by GMX_PRT1_CFG[SPEED]. - */ - - /* In MII mode, CLK_CNT = 1. */ - if (((index == 0) && (mode.s.p0mii == 1)) - || ((index != 0) && (mode.s.type == 1))) { - cvmx_write_csr(CVMX_GMXX_TXX_CLK - (index, interface), 1); - } - } - } - - /* Do a read to make sure all setup stuff is complete */ - cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); - - /* Save the new GMX setting without enabling the port */ - cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64); - - /* Enable the lowest level RX */ - cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), - cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface)) | (1 << - index)); - - /* Re-enable the TX path */ - for (i = 0; i < cvmx_pko_get_num_queues(ipd_port); i++) { - int queue = cvmx_pko_get_base_queue(ipd_port) + i; - cvmx_write_csr(CVMX_PKO_REG_READ_IDX, queue); - cvmx_write_csr(CVMX_PKO_MEM_QUEUE_QOS, - pko_mem_queue_qos_save[i].u64); - } - - /* Restore backpressure */ - cvmx_write_csr(CVMX_GMXX_TX_OVR_BP(interface), gmx_tx_ovr_bp_save.u64); - - /* Restore the GMX enable state. Port config is complete */ - new_gmx_cfg.s.en = original_gmx_cfg.s.en; - cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64); - - return result; -} - -/** - * 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_rgmii_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); - int original_enable; - union cvmx_gmxx_prtx_cfg gmx_cfg; - union cvmx_asxx_prt_loop asxx_prt_loop; - - /* Read the current enable state and save it */ - gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); - original_enable = gmx_cfg.s.en; - /* Force port to be disabled */ - gmx_cfg.s.en = 0; - if (enable_internal) { - /* Force speed if we're doing internal loopback */ - 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); - - /* Set the loopback bits */ - asxx_prt_loop.u64 = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface)); - if (enable_internal) - asxx_prt_loop.s.int_loop |= 1 << index; - else - asxx_prt_loop.s.int_loop &= ~(1 << index); - if (enable_external) - asxx_prt_loop.s.ext_loop |= 1 << index; - else - asxx_prt_loop.s.ext_loop &= ~(1 << index); - cvmx_write_csr(CVMX_ASXX_PRT_LOOP(interface), asxx_prt_loop.u64); - - /* Force enables in internal loopback */ - if (enable_internal) { - uint64_t 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); - original_enable = 1; - } - - /* Restore the enable state */ - gmx_cfg.s.en = original_enable; - cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64); - return 0; -} |
