279 lines
6.0 KiB
C
279 lines
6.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2014
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* Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
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*/
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#include <common.h>
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#include <log.h>
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#include <miiphy.h>
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enum {
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MIICMD_SET,
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MIICMD_MODIFY,
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MIICMD_VERIFY_VALUE,
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MIICMD_WAIT_FOR_VALUE,
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};
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struct mii_setupcmd {
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u8 token;
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u8 reg;
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u16 data;
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u16 mask;
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u32 timeout;
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};
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/*
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* verify we are talking to a 88e1518
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*/
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struct mii_setupcmd verify_88e1518[] = {
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{ MIICMD_SET, 22, 0x0000 },
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{ MIICMD_VERIFY_VALUE, 2, 0x0141, 0xffff },
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{ MIICMD_VERIFY_VALUE, 3, 0x0dd0, 0xfff0 },
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};
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/*
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* workaround for erratum mentioned in 88E1518 release notes
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*/
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struct mii_setupcmd fixup_88e1518[] = {
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{ MIICMD_SET, 22, 0x00ff },
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{ MIICMD_SET, 17, 0x214b },
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{ MIICMD_SET, 16, 0x2144 },
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{ MIICMD_SET, 17, 0x0c28 },
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{ MIICMD_SET, 16, 0x2146 },
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{ MIICMD_SET, 17, 0xb233 },
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{ MIICMD_SET, 16, 0x214d },
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{ MIICMD_SET, 17, 0xcc0c },
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{ MIICMD_SET, 16, 0x2159 },
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{ MIICMD_SET, 22, 0x0000 },
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};
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/*
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* default initialization:
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* - set RGMII receive timing to "receive clock transition when data stable"
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* - set RGMII transmit timing to "transmit clock internally delayed"
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* - set RGMII output impedance target to 78,8 Ohm
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* - run output impedance calibration
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* - set autonegotiation advertise to 1000FD only
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*/
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struct mii_setupcmd default_88e1518[] = {
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{ MIICMD_SET, 22, 0x0002 },
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{ MIICMD_MODIFY, 21, 0x0030, 0x0030 },
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{ MIICMD_MODIFY, 25, 0x0000, 0x0003 },
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{ MIICMD_MODIFY, 24, 0x8000, 0x8000 },
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{ MIICMD_WAIT_FOR_VALUE, 24, 0x4000, 0x4000, 2000 },
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{ MIICMD_SET, 22, 0x0000 },
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{ MIICMD_MODIFY, 4, 0x0000, 0x01e0 },
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{ MIICMD_MODIFY, 9, 0x0200, 0x0300 },
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};
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/*
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* turn off CLK125 for PHY daughterboard
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*/
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struct mii_setupcmd ch1fix_88e1518[] = {
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{ MIICMD_SET, 22, 0x0002 },
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{ MIICMD_MODIFY, 16, 0x0006, 0x0006 },
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{ MIICMD_SET, 22, 0x0000 },
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};
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/*
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* perform copper software reset
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*/
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struct mii_setupcmd swreset_88e1518[] = {
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{ MIICMD_SET, 22, 0x0000 },
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{ MIICMD_MODIFY, 0, 0x8000, 0x8000 },
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{ MIICMD_WAIT_FOR_VALUE, 0, 0x0000, 0x8000, 2000 },
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};
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/*
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* special one for 88E1514:
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* Force SGMII to Copper mode
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*/
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struct mii_setupcmd mii_to_copper_88e1514[] = {
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{ MIICMD_SET, 22, 0x0012 },
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{ MIICMD_MODIFY, 20, 0x0001, 0x0007 },
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{ MIICMD_MODIFY, 20, 0x8000, 0x8000 },
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{ MIICMD_SET, 22, 0x0000 },
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};
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/*
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* turn off SGMII auto-negotiation
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*/
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struct mii_setupcmd sgmii_autoneg_off_88e1518[] = {
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{ MIICMD_SET, 22, 0x0001 },
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{ MIICMD_MODIFY, 0, 0x0000, 0x1000 },
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{ MIICMD_MODIFY, 0, 0x8000, 0x8000 },
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{ MIICMD_SET, 22, 0x0000 },
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};
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/*
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* invert LED2 polarity
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*/
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struct mii_setupcmd invert_led2_88e1514[] = {
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{ MIICMD_SET, 22, 0x0003 },
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{ MIICMD_MODIFY, 17, 0x0030, 0x0010 },
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{ MIICMD_SET, 22, 0x0000 },
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};
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static int process_setupcmd(const char *bus, unsigned char addr,
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struct mii_setupcmd *setupcmd)
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{
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int res;
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u8 reg = setupcmd->reg;
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u16 data = setupcmd->data;
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u16 mask = setupcmd->mask;
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u32 timeout = setupcmd->timeout;
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u16 orig_data;
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unsigned long start;
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debug("mii %s:%u reg %2u ", bus, addr, reg);
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switch (setupcmd->token) {
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case MIICMD_MODIFY:
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res = miiphy_read(bus, addr, reg, &orig_data);
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if (res)
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break;
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debug("is %04x. (value %04x mask %04x) ", orig_data, data,
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mask);
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data = (orig_data & ~mask) | (data & mask);
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/* fallthrough */
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case MIICMD_SET:
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debug("=> %04x\n", data);
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res = miiphy_write(bus, addr, reg, data);
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break;
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case MIICMD_VERIFY_VALUE:
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res = miiphy_read(bus, addr, reg, &orig_data);
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if (res)
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break;
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if ((orig_data & mask) != (data & mask))
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res = -1;
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debug("(value %04x mask %04x) == %04x? %s\n", data, mask,
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orig_data, res ? "FAIL" : "PASS");
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break;
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case MIICMD_WAIT_FOR_VALUE:
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res = -1;
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start = get_timer(0);
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while ((res != 0) && (get_timer(start) < timeout)) {
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res = miiphy_read(bus, addr, reg, &orig_data);
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if (res)
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continue;
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if ((orig_data & mask) != (data & mask))
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res = -1;
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}
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debug("(value %04x mask %04x) == %04x? %s after %lu ms\n", data,
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mask, orig_data, res ? "FAIL" : "PASS",
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get_timer(start));
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break;
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default:
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res = -1;
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break;
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}
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return res;
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}
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static int process_setup(const char *bus, unsigned char addr,
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struct mii_setupcmd *setupcmd, unsigned int count)
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{
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int res = 0;
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unsigned int k;
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for (k = 0; k < count; ++k) {
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res = process_setupcmd(bus, addr, &setupcmd[k]);
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if (res) {
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printf("mii cmd %u on bus %s addr %u failed, aborting setup\n",
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setupcmd[k].token, bus, addr);
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break;
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}
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}
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return res;
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}
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int setup_88e1518(const char *bus, unsigned char addr)
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{
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int res;
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res = process_setup(bus, addr,
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verify_88e1518, ARRAY_SIZE(verify_88e1518));
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if (res)
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return res;
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res = process_setup(bus, addr,
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fixup_88e1518, ARRAY_SIZE(fixup_88e1518));
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if (res)
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return res;
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res = process_setup(bus, addr,
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default_88e1518, ARRAY_SIZE(default_88e1518));
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if (res)
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return res;
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if (addr) {
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res = process_setup(bus, addr,
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ch1fix_88e1518, ARRAY_SIZE(ch1fix_88e1518));
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if (res)
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return res;
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}
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res = process_setup(bus, addr,
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swreset_88e1518, ARRAY_SIZE(swreset_88e1518));
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if (res)
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return res;
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return 0;
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}
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int setup_88e1514(const char *bus, unsigned char addr)
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{
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int res;
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res = process_setup(bus, addr,
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verify_88e1518, ARRAY_SIZE(verify_88e1518));
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if (res)
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return res;
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res = process_setup(bus, addr,
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fixup_88e1518, ARRAY_SIZE(fixup_88e1518));
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if (res)
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return res;
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res = process_setup(bus, addr,
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mii_to_copper_88e1514,
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ARRAY_SIZE(mii_to_copper_88e1514));
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if (res)
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return res;
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res = process_setup(bus, addr,
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sgmii_autoneg_off_88e1518,
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ARRAY_SIZE(sgmii_autoneg_off_88e1518));
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if (res)
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return res;
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res = process_setup(bus, addr,
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invert_led2_88e1514,
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ARRAY_SIZE(invert_led2_88e1514));
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if (res)
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return res;
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res = process_setup(bus, addr,
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default_88e1518, ARRAY_SIZE(default_88e1518));
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if (res)
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return res;
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if (addr) {
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res = process_setup(bus, addr,
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ch1fix_88e1518, ARRAY_SIZE(ch1fix_88e1518));
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if (res)
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return res;
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}
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res = process_setup(bus, addr,
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swreset_88e1518, ARRAY_SIZE(swreset_88e1518));
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if (res)
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return res;
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return 0;
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}
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