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https://github.com/AsahiLinux/u-boot
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5c58002255
Several Octeon drivers operate by setting the sequence number of their device. This should not be needed with the new sequence number setup. Also it is not permitted. Drop it. Signed-off-by: Simon Glass <sjg@chromium.org>
379 lines
7.8 KiB
C
379 lines
7.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2018 Marvell International Ltd.
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*/
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#include <dm.h>
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#include <malloc.h>
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#include <miiphy.h>
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#include <misc.h>
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#include <pci.h>
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#include <pci_ids.h>
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#include <phy.h>
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#include <asm/io.h>
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#include <linux/ctype.h>
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#include <linux/delay.h>
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#define PCI_DEVICE_ID_OCTEONTX_SMI 0xA02B
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DECLARE_GLOBAL_DATA_PTR;
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enum octeontx_smi_mode {
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CLAUSE22 = 0,
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CLAUSE45 = 1,
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};
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enum {
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SMI_OP_C22_WRITE = 0,
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SMI_OP_C22_READ = 1,
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SMI_OP_C45_ADDR = 0,
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SMI_OP_C45_WRITE = 1,
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SMI_OP_C45_PRIA = 2,
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SMI_OP_C45_READ = 3,
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};
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union smi_x_clk {
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u64 u;
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struct smi_x_clk_s {
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int phase:8;
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int sample:4;
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int preamble:1;
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int clk_idle:1;
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int reserved_14_14:1;
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int sample_mode:1;
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int sample_hi:5;
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int reserved_21_23:3;
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int mode:1;
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} s;
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};
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union smi_x_cmd {
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u64 u;
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struct smi_x_cmd_s {
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int reg_adr:5;
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int reserved_5_7:3;
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int phy_adr:5;
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int reserved_13_15:3;
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int phy_op:2;
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} s;
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};
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union smi_x_wr_dat {
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u64 u;
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struct smi_x_wr_dat_s {
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unsigned int dat:16;
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int val:1;
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int pending:1;
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} s;
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};
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union smi_x_rd_dat {
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u64 u;
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struct smi_x_rd_dat_s {
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unsigned int dat:16;
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int val:1;
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int pending:1;
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} s;
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};
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union smi_x_en {
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u64 u;
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struct smi_x_en_s {
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int en:1;
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} s;
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};
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#define SMI_X_RD_DAT 0x10ull
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#define SMI_X_WR_DAT 0x08ull
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#define SMI_X_CMD 0x00ull
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#define SMI_X_CLK 0x18ull
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#define SMI_X_EN 0x20ull
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struct octeontx_smi_priv {
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void __iomem *baseaddr;
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enum octeontx_smi_mode mode;
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};
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#define MDIO_TIMEOUT 10000
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void octeontx_smi_setmode(struct mii_dev *bus, enum octeontx_smi_mode mode)
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{
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struct octeontx_smi_priv *priv = bus->priv;
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union smi_x_clk smix_clk;
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smix_clk.u = readq(priv->baseaddr + SMI_X_CLK);
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smix_clk.s.mode = mode;
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smix_clk.s.preamble = mode == CLAUSE45;
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writeq(smix_clk.u, priv->baseaddr + SMI_X_CLK);
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priv->mode = mode;
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}
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int octeontx_c45_addr(struct mii_dev *bus, int addr, int devad, int regnum)
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{
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struct octeontx_smi_priv *priv = bus->priv;
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union smi_x_cmd smix_cmd;
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union smi_x_wr_dat smix_wr_dat;
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unsigned long timeout = MDIO_TIMEOUT;
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smix_wr_dat.u = 0;
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smix_wr_dat.s.dat = regnum;
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writeq(smix_wr_dat.u, priv->baseaddr + SMI_X_WR_DAT);
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smix_cmd.u = 0;
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smix_cmd.s.phy_op = SMI_OP_C45_ADDR;
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smix_cmd.s.phy_adr = addr;
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smix_cmd.s.reg_adr = devad;
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writeq(smix_cmd.u, priv->baseaddr + SMI_X_CMD);
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do {
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smix_wr_dat.u = readq(priv->baseaddr + SMI_X_WR_DAT);
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udelay(100);
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timeout--;
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} while (smix_wr_dat.s.pending && timeout);
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return timeout == 0;
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}
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int octeontx_phy_read(struct mii_dev *bus, int addr, int devad, int regnum)
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{
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struct octeontx_smi_priv *priv = bus->priv;
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union smi_x_cmd smix_cmd;
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union smi_x_rd_dat smix_rd_dat;
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unsigned long timeout = MDIO_TIMEOUT;
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int ret;
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enum octeontx_smi_mode mode = (devad < 0) ? CLAUSE22 : CLAUSE45;
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debug("RD: Mode: %u, baseaddr: %p, addr: %d, devad: %d, reg: %d\n",
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mode, priv->baseaddr, addr, devad, regnum);
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octeontx_smi_setmode(bus, mode);
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if (mode == CLAUSE45) {
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ret = octeontx_c45_addr(bus, addr, devad, regnum);
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debug("RD: ret: %u\n", ret);
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if (ret)
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return 0;
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}
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smix_cmd.u = 0;
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smix_cmd.s.phy_adr = addr;
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if (mode == CLAUSE45) {
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smix_cmd.s.reg_adr = devad;
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smix_cmd.s.phy_op = SMI_OP_C45_READ;
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} else {
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smix_cmd.s.reg_adr = regnum;
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smix_cmd.s.phy_op = SMI_OP_C22_READ;
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}
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writeq(smix_cmd.u, priv->baseaddr + SMI_X_CMD);
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do {
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smix_rd_dat.u = readq(priv->baseaddr + SMI_X_RD_DAT);
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udelay(10);
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timeout--;
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} while (smix_rd_dat.s.pending && timeout);
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debug("SMIX_RD_DAT: %lx\n", (unsigned long)smix_rd_dat.u);
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return smix_rd_dat.s.dat;
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}
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int octeontx_phy_write(struct mii_dev *bus, int addr, int devad, int regnum,
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u16 value)
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{
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struct octeontx_smi_priv *priv = bus->priv;
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union smi_x_cmd smix_cmd;
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union smi_x_wr_dat smix_wr_dat;
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unsigned long timeout = MDIO_TIMEOUT;
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int ret;
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enum octeontx_smi_mode mode = (devad < 0) ? CLAUSE22 : CLAUSE45;
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debug("WR: Mode: %u, baseaddr: %p, addr: %d, devad: %d, reg: %d\n",
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mode, priv->baseaddr, addr, devad, regnum);
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if (mode == CLAUSE45) {
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ret = octeontx_c45_addr(bus, addr, devad, regnum);
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debug("WR: ret: %u\n", ret);
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if (ret)
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return ret;
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}
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smix_wr_dat.u = 0;
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smix_wr_dat.s.dat = value;
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writeq(smix_wr_dat.u, priv->baseaddr + SMI_X_WR_DAT);
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smix_cmd.u = 0;
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smix_cmd.s.phy_adr = addr;
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if (mode == CLAUSE45) {
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smix_cmd.s.reg_adr = devad;
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smix_cmd.s.phy_op = SMI_OP_C45_WRITE;
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} else {
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smix_cmd.s.reg_adr = regnum;
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smix_cmd.s.phy_op = SMI_OP_C22_WRITE;
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}
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writeq(smix_cmd.u, priv->baseaddr + SMI_X_CMD);
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do {
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smix_wr_dat.u = readq(priv->baseaddr + SMI_X_WR_DAT);
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udelay(10);
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timeout--;
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} while (smix_wr_dat.s.pending && timeout);
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debug("SMIX_WR_DAT: %lx\n", (unsigned long)smix_wr_dat.u);
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return timeout == 0;
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}
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int octeontx_smi_reset(struct mii_dev *bus)
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{
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struct octeontx_smi_priv *priv = bus->priv;
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union smi_x_en smi_en;
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smi_en.s.en = 0;
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writeq(smi_en.u, priv->baseaddr + SMI_X_EN);
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smi_en.s.en = 1;
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writeq(smi_en.u, priv->baseaddr + SMI_X_EN);
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octeontx_smi_setmode(bus, CLAUSE22);
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return 0;
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}
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/* PHY XS initialization, primarily for RXAUI
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*
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*/
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int rxaui_phy_xs_init(struct mii_dev *bus, int phy_addr)
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{
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int reg;
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ulong start_time;
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int phy_id1, phy_id2;
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int oui, model_number;
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phy_id1 = octeontx_phy_read(bus, phy_addr, 1, 0x2);
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phy_id2 = octeontx_phy_read(bus, phy_addr, 1, 0x3);
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model_number = (phy_id2 >> 4) & 0x3F;
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debug("%s model %x\n", __func__, model_number);
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oui = phy_id1;
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oui <<= 6;
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oui |= (phy_id2 >> 10) & 0x3F;
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debug("%s oui %x\n", __func__, oui);
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switch (oui) {
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case 0x5016:
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if (model_number == 9) {
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debug("%s +\n", __func__);
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/* Perform hardware reset in XGXS control */
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reg = octeontx_phy_read(bus, phy_addr, 4, 0x0);
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if ((reg & 0xffff) < 0)
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goto read_error;
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reg |= 0x8000;
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octeontx_phy_write(bus, phy_addr, 4, 0x0, reg);
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start_time = get_timer(0);
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do {
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reg = octeontx_phy_read(bus, phy_addr, 4, 0x0);
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if ((reg & 0xffff) < 0)
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goto read_error;
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} while ((reg & 0x8000) && get_timer(start_time) < 500);
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if (reg & 0x8000) {
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printf("HW reset for M88X3120 PHY failed");
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printf("MII_BMCR: 0x%x\n", reg);
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return -1;
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}
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/* program 4.49155 with 0x5 */
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octeontx_phy_write(bus, phy_addr, 4, 0xc003, 0x5);
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}
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break;
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default:
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break;
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}
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return 0;
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read_error:
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debug("M88X3120 PHY config read failed\n");
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return -1;
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}
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int octeontx_smi_probe(struct udevice *dev)
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{
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int ret, subnode, cnt = 0, node = dev->node.of_offset;
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struct mii_dev *bus;
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struct octeontx_smi_priv *priv;
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pci_dev_t bdf = dm_pci_get_bdf(dev);
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debug("SMI PCI device: %x\n", bdf);
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if (!dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, PCI_REGION_MEM)) {
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printf("Failed to map PCI region for bdf %x\n", bdf);
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return -1;
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}
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fdt_for_each_subnode(subnode, gd->fdt_blob, node) {
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ret = fdt_node_check_compatible(gd->fdt_blob, subnode,
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"cavium,thunder-8890-mdio");
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if (ret)
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continue;
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bus = mdio_alloc();
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priv = malloc(sizeof(*priv));
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if (!bus || !priv) {
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printf("Failed to allocate OcteonTX MDIO bus # %u\n",
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dev_seq(dev));
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return -1;
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}
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bus->read = octeontx_phy_read;
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bus->write = octeontx_phy_write;
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bus->reset = octeontx_smi_reset;
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bus->priv = priv;
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priv->mode = CLAUSE22;
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priv->baseaddr = (void __iomem *)fdtdec_get_addr(gd->fdt_blob,
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subnode,
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"reg");
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debug("mdio base addr %p\n", priv->baseaddr);
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/* use given name or generate its own unique name */
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snprintf(bus->name, MDIO_NAME_LEN, "smi%d", cnt++);
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ret = mdio_register(bus);
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if (ret)
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return ret;
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}
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return 0;
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}
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static const struct udevice_id octeontx_smi_ids[] = {
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{ .compatible = "cavium,thunder-8890-mdio-nexus" },
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{}
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};
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U_BOOT_DRIVER(octeontx_smi) = {
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.name = "octeontx_smi",
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.id = UCLASS_MISC,
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.probe = octeontx_smi_probe,
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.of_match = octeontx_smi_ids,
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};
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static struct pci_device_id octeontx_smi_supported[] = {
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{ PCI_VDEVICE(CAVIUM, PCI_DEVICE_ID_CAVIUM_SMI) },
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{}
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};
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U_BOOT_PCI_DEVICE(octeontx_smi, octeontx_smi_supported);
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