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linux/arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c
Randy Dunlap 16df55ce10 mips: clean up (remove) kernel-doc in cavium-octeon/executive/ 
Remove all kernel-doc notation in arch/mips/cavium-octeon/executive/.
This removes dozens of kernel-doc warnings.

Most of these functions are static and don't need to be documented
with kernel-doc.
The function comments are still present for anyone who wants to read them.
These files are part of the OCTEON SDK so presumably they are documented
there as well.

   arch/mips/cavium-octeon/executive/cvmx-bootmem.c:61: warning: Function parameter or member 'addr' not described in 'CVMX_BOOTMEM_NAMED_GET_FIELD'
   arch/mips/cavium-octeon/executive/cvmx-bootmem.c:61: warning: Function parameter or member 'field' not described in 'CVMX_BOOTMEM_NAMED_GET_FIELD'
   arch/mips/cavium-octeon/executive/cvmx-bootmem.c:61: warning: expecting prototype for This macro returns a member of the(). Prototype was for CVMX_BOOTMEM_NAMED_GET_FIELD() instead
   arch/mips/cavium-octeon/executive/cvmx-bootmem.c:77: warning: Function parameter or member 'base' not described in '__cvmx_bootmem_desc_get'
   arch/mips/cavium-octeon/executive/cvmx-bootmem.c:77: warning: Function parameter or member 'offset' not described in '__cvmx_bootmem_desc_get'
   arch/mips/cavium-octeon/executive/cvmx-bootmem.c:77: warning: Function parameter or member 'size' not described in '__cvmx_bootmem_desc_get'
   arch/mips/cavium-octeon/executive/cvmx-bootmem.c:77: warning: expecting prototype for This function is the implementation of the get macros defined(). Prototype was for __cvmx_bootmem_desc_get() instead
   arch/mips/cavium-octeon/executive/cvmx-bootmem.c:133: warning: expecting prototype for Allocate a block of memory from the free list that was(). Prototype was for cvmx_bootmem_alloc_range() instead
   arch/mips/cavium-octeon/executive/cvmx-bootmem.c:554: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Finds a named memory block by name.
   arch/mips/cavium-octeon/executive/cvmx-bootmem.c:661: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Frees a named block.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/mips/cavium-octeon/executive/cvmx-helper-board.c:64: warning: expecting prototype for Return the MII PHY address associated with the given IPD(). Prototype was for cvmx_helper_board_get_mii_address() instead
   arch/mips/cavium-octeon/executive/cvmx-helper-board.c:211: warning: expecting prototype for This function is the board specific method of determining an(). Prototype was for __cvmx_helper_board_link_get() instead
   arch/mips/cavium-octeon/executive/cvmx-helper-board.c:278: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * This function is called by cvmx_helper_interface_probe() after it
   arch/mips/cavium-octeon/executive/cvmx-helper-board.c:324: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Get the clock type used for the USB block based on board type.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/mips/cavium-octeon/executive/cvmx-spi.c:77: warning: expecting prototype for Get current SPI4 initialization callbacks(). Prototype was for cvmx_spi_get_callbacks() instead
   arch/mips/cavium-octeon/executive/cvmx-spi.c:87: warning: expecting prototype for Set new SPI4 initialization callbacks(). Prototype was for cvmx_spi_set_callbacks() instead
   arch/mips/cavium-octeon/executive/cvmx-spi.c:92: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Initialize and start the SPI interface.
   arch/mips/cavium-octeon/executive/cvmx-spi.c:151: warning: expecting prototype for This routine restarts the SPI interface after it has lost synchronization(). Prototype was for cvmx_spi_restart_interface() instead
   arch/mips/cavium-octeon/executive/cvmx-spi.c:196: warning: expecting prototype for Callback to perform SPI4 reset(). Prototype was for cvmx_spi_reset_cb() instead
   arch/mips/cavium-octeon/executive/cvmx-spi.c:313: warning: expecting prototype for Callback to setup calendar and miscellaneous settings before clock detection(). Prototype was for cvmx_spi_calendar_setup_cb() instead
   arch/mips/cavium-octeon/executive/cvmx-spi.c:431: warning: expecting prototype for Callback to perform clock detection(). Prototype was for cvmx_spi_clock_detect_cb() instead
   arch/mips/cavium-octeon/executive/cvmx-spi.c:509: warning: expecting prototype for Callback to perform link training(). Prototype was for cvmx_spi_training_cb() instead
   arch/mips/cavium-octeon/executive/cvmx-spi.c:578: warning: expecting prototype for Callback to perform calendar data synchronization(). Prototype was for cvmx_spi_calendar_sync_cb() instead
   arch/mips/cavium-octeon/executive/cvmx-spi.c:634: warning: expecting prototype for Callback to handle interface up(). Prototype was for cvmx_spi_interface_up_cb() instead
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/mips/cavium-octeon/executive/cvmx-helper-xaui.c:67: warning: expecting prototype for Probe a XAUI interface and determine the number of ports(). Prototype was for __cvmx_helper_xaui_probe() instead
   arch/mips/cavium-octeon/executive/cvmx-helper-xaui.c:106: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Bringup and enable a XAUI interface. After this call packet
   arch/mips/cavium-octeon/executive/cvmx-helper-xaui.c:253: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Return the link state of an IPD/PKO port as returned by
   arch/mips/cavium-octeon/executive/cvmx-helper-xaui.c:292: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Configure an IPD/PKO port for the specified link state. This
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/mips/cavium-octeon/executive/cvmx-pko.c:43: warning: Function parameter or member 'interface' not described in '__cvmx_pko_int'
   arch/mips/cavium-octeon/executive/cvmx-pko.c:43: warning: Function parameter or member 'index' not described in '__cvmx_pko_int'
   arch/mips/cavium-octeon/executive/cvmx-pko.c:43: warning: expecting prototype for Internal state of packet output(). Prototype was for __cvmx_pko_int() instead
   arch/mips/cavium-octeon/executive/cvmx-pko.c:186: warning: expecting prototype for Call before any other calls to initialize the packet(). Prototype was for cvmx_pko_initialize_global() instead
   arch/mips/cavium-octeon/executive/cvmx-pko.c:241: warning: expecting prototype for This function does per(). Prototype was for cvmx_pko_initialize_local() instead
   arch/mips/cavium-octeon/executive/cvmx-pko.c:247: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Enables the packet output hardware. It must already be
   arch/mips/cavium-octeon/executive/cvmx-pko.c:270: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Disables the packet output. Does not affect any configuration.
   arch/mips/cavium-octeon/executive/cvmx-pko.c:282: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Reset the packet output.
   arch/mips/cavium-octeon/executive/cvmx-pko.c:293: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Shutdown and free resources required by packet output.
   arch/mips/cavium-octeon/executive/cvmx-pko.c:324: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Configure a output port and the associated queues for use.
   arch/mips/cavium-octeon/executive/cvmx-pko.c:555: warning: expecting prototype for Show map of ports(). Prototype was for cvmx_pko_show_queue_map() instead
   arch/mips/cavium-octeon/executive/cvmx-pko.c:577: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Rate limit a PKO port to a max packets/sec. This function is only
   arch/mips/cavium-octeon/executive/cvmx-pko.c:610: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Rate limit a PKO port to a max bits/sec. This function is only
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c:49: warning: cannot understand function prototype: '__cvmx_cmd_queue_all_state_t *__cvmx_cmd_queue_state_ptr; '
   arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c:53: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Initialize the Global queue state pointer.
   arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c:101: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Initialize a command queue for use. The initial FPA buffer is
   arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c:199: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Shutdown a queue a free it's command buffers to the FPA. The
   arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c:235: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Return the number of command words pending in the queue. This
   arch/mips/cavium-octeon/executive/cvmx-cmd-queue.c:291: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Return the command buffer to be written to. The purpose of this
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c:53: warning: expecting prototype for Probe RGMII ports and determine the number present(). Prototype was for __cvmx_helper_rgmii_probe() instead
   arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c:92: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Put an RGMII interface in loopback mode. Internal packets sent
   arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c:135: warning: expecting prototype for Workaround ASX setup errata with CN38XX pass1(). Prototype was for __cvmx_helper_errata_asx_pass1() instead
   arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c:152: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Configure all of the ASX, GMX, and PKO registers required
   arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c:255: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Return the link state of an IPD/PKO port as returned by
   arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c:284: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Configure an IPD/PKO port for the specified link state. This
--
arch/mips/cavium-octeon/executive/cvmx-l2c.c:768: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Return log base 2 of the number of sets in the L2 cache
   arch/mips/cavium-octeon/executive/cvmx-l2c.c:861: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * Flush a line from the L2 cache

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Aditya Srivastava <yashsri421@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@vger.kernel.org
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2021-07-28 11:22:21 +02:00

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/***********************license start***************
* Author: Cavium Networks
*
* Contact: support@caviumnetworks.com
* This file is part of the OCTEON SDK
*
* Copyright (C) 2003-2018 Cavium, Inc.
*
* 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 <asm/octeon/cvmx-config.h>
#include <asm/octeon/cvmx-pko.h>
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-helper-board.h>
#include <asm/octeon/cvmx-npi-defs.h>
#include <asm/octeon/cvmx-gmxx-defs.h>
#include <asm/octeon/cvmx-asxx-defs.h>
#include <asm/octeon/cvmx-dbg-defs.h>
/*
* 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 registers 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;
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
*/
union cvmx_helper_link_info __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 */
union cvmx_helper_link_info 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().
*
* @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,
union cvmx_helper_link_info 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));
memset(pko_mem_queue_qos_save, 0, sizeof(pko_mem_queue_qos_save));
/* 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;
}
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