mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-02 01:19:49 +00:00
0008e9a69d
Adds support for Network Interface controllers found on OcteonTX SoC platforms. Signed-off-by: Suneel Garapati <sgarapati@marvell.com> Signed-off-by: Stefan Roese <sr@denx.de> Cc: Joe Hershberger <joe.hershberger@ni.com>
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2018 Marvell International Ltd.
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <fdt_support.h>
|
|
#include <pci.h>
|
|
#include <malloc.h>
|
|
#include <miiphy.h>
|
|
#include <misc.h>
|
|
#include <net.h>
|
|
#include <netdev.h>
|
|
#include <asm/io.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/libfdt.h>
|
|
|
|
#include <asm/arch/csrs/csrs-xcv.h>
|
|
|
|
#define XCVX_BASE 0x87E0DB000000ULL
|
|
|
|
/* Initialize XCV block */
|
|
void xcv_init_hw(void)
|
|
{
|
|
union xcvx_reset reset;
|
|
union xcvx_dll_ctl xcv_dll_ctl;
|
|
|
|
/* Take the DLL out of reset */
|
|
reset.u = readq(XCVX_BASE + XCVX_RESET(0));
|
|
reset.s.dllrst = 0;
|
|
writeq(reset.u, XCVX_BASE + XCVX_RESET(0));
|
|
|
|
/* Take the clock tree out of reset */
|
|
reset.u = readq(XCVX_BASE + XCVX_RESET(0));
|
|
reset.s.clkrst = 0;
|
|
writeq(reset.u, XCVX_BASE + XCVX_RESET(0));
|
|
|
|
/* Once the 125MHz ref clock is stable, wait 10us for DLL to lock */
|
|
udelay(10);
|
|
|
|
/* Optionally, bypass the DLL setting */
|
|
xcv_dll_ctl.u = readq(XCVX_BASE + XCVX_DLL_CTL(0));
|
|
xcv_dll_ctl.s.clkrx_set = 0;
|
|
xcv_dll_ctl.s.clkrx_byp = 1;
|
|
xcv_dll_ctl.s.clktx_byp = 0;
|
|
writeq(xcv_dll_ctl.u, XCVX_BASE + XCVX_DLL_CTL(0));
|
|
|
|
/* Enable the compensation controller */
|
|
reset.u = readq(XCVX_BASE + XCVX_RESET(0));
|
|
reset.s.comp = 1;
|
|
writeq(reset.u, XCVX_BASE + XCVX_RESET(0));
|
|
reset.u = readq(XCVX_BASE + XCVX_RESET(0));
|
|
|
|
/* Wait for 1040 reference clock cycles for the compensation state
|
|
* machine lock.
|
|
*/
|
|
udelay(100);
|
|
|
|
/* Enable the XCV block */
|
|
reset.u = readq(XCVX_BASE + XCVX_RESET(0));
|
|
reset.s.enable = 1;
|
|
writeq(reset.u, XCVX_BASE + XCVX_RESET(0));
|
|
|
|
/* set XCV(0)_RESET[CLKRST] to 1 */
|
|
reset.u = readq(XCVX_BASE + XCVX_RESET(0));
|
|
reset.s.clkrst = 1;
|
|
writeq(reset.u, XCVX_BASE + XCVX_RESET(0));
|
|
}
|
|
|
|
/*
|
|
* Configure XCV link based on the speed
|
|
* link_up : Set to 1 when link is up otherwise 0
|
|
* link_speed: The speed of the link.
|
|
*/
|
|
void xcv_setup_link(bool link_up, int link_speed)
|
|
{
|
|
union xcvx_ctl xcv_ctl;
|
|
union xcvx_reset reset;
|
|
union xcvx_batch_crd_ret xcv_crd_ret;
|
|
int speed = 2;
|
|
|
|
/* Check RGMII link */
|
|
if (link_speed == 100)
|
|
speed = 1;
|
|
else if (link_speed == 10)
|
|
speed = 0;
|
|
|
|
if (link_up) {
|
|
/* Set operating speed */
|
|
xcv_ctl.u = readq(XCVX_BASE + XCVX_CTL(0));
|
|
xcv_ctl.s.speed = speed;
|
|
writeq(xcv_ctl.u, XCVX_BASE + XCVX_CTL(0));
|
|
|
|
/* Datapaths come out of reset
|
|
* - The datapath resets will disengage BGX from the
|
|
* RGMII interface
|
|
* - XCV will continue to return TX credits for each tick
|
|
* that is sent on the TX data path
|
|
*/
|
|
reset.u = readq(XCVX_BASE + XCVX_RESET(0));
|
|
reset.s.tx_dat_rst_n = 1;
|
|
reset.s.rx_dat_rst_n = 1;
|
|
writeq(reset.u, XCVX_BASE + XCVX_RESET(0));
|
|
|
|
/* Enable packet flow */
|
|
reset.u = readq(XCVX_BASE + XCVX_RESET(0));
|
|
reset.s.tx_pkt_rst_n = 1;
|
|
reset.s.rx_pkt_rst_n = 1;
|
|
writeq(reset.u, XCVX_BASE + XCVX_RESET(0));
|
|
|
|
xcv_crd_ret.u = readq(XCVX_BASE + XCVX_BATCH_CRD_RET(0));
|
|
xcv_crd_ret.s.crd_ret = 1;
|
|
writeq(xcv_crd_ret.u, XCVX_BASE + XCVX_BATCH_CRD_RET(0));
|
|
} else {
|
|
/* Enable packet flow */
|
|
reset.u = readq(XCVX_BASE + XCVX_RESET(0));
|
|
reset.s.tx_pkt_rst_n = 0;
|
|
reset.s.rx_pkt_rst_n = 0;
|
|
writeq(reset.u, XCVX_BASE + XCVX_RESET(0));
|
|
reset.u = readq(XCVX_BASE + XCVX_RESET(0));
|
|
}
|
|
}
|