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// SPDX-License-Identifier: GPL-2.0-only
/*****************************************************************************
* *
* File: mv88x201x.c *
* $Revision: 1.12 $ *
* $Date: 2005/04/15 19:27:14 $ *
* Description: *
* Marvell PHY (mv88x201x) functionality. *
* part of the Chelsio 10Gb Ethernet Driver. *
* *
* *
* http://www.chelsio.com *
* *
* Copyright (c) 2003 - 2005 Chelsio Communications, Inc. *
* All rights reserved. *
* *
* Maintainers: maintainers@chelsio.com *
* *
* Authors: Dimitrios Michailidis <dm@chelsio.com> *
* Tina Yang <tainay@chelsio.com> *
* Felix Marti <felix@chelsio.com> *
* Scott Bardone <sbardone@chelsio.com> *
* Kurt Ottaway <kottaway@chelsio.com> *
* Frank DiMambro <frank@chelsio.com> *
* *
* History: *
* *
****************************************************************************/
#include "cphy.h"
#include "elmer0.h"
/*
* The 88x2010 Rev C. requires some link status registers * to be read
* twice in order to get the right values. Future * revisions will fix
* this problem and then this macro * can disappear.
*/
#define MV88x2010_LINK_STATUS_BUGS 1
static int led_init(struct cphy *cphy)
{
/* Setup the LED registers so we can turn on/off.
* Writing these bits maps control to another
* register. mmd(0x1) addr(0x7)
*/
cphy_mdio_write(cphy, MDIO_MMD_PCS, 0x8304, 0xdddd);
return 0;
}
static int led_link(struct cphy *cphy, u32 do_enable)
{
u32 led = 0;
#define LINK_ENABLE_BIT 0x1
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_CTRL2, &led);
if (do_enable & LINK_ENABLE_BIT) {
led |= LINK_ENABLE_BIT;
cphy_mdio_write(cphy, MDIO_MMD_PMAPMD, MDIO_CTRL2, led);
} else {
led &= ~LINK_ENABLE_BIT;
cphy_mdio_write(cphy, MDIO_MMD_PMAPMD, MDIO_CTRL2, led);
}
return 0;
}
/* Port Reset */
static int mv88x201x_reset(struct cphy *cphy, int wait)
{
/* This can be done through registers. It is not required since
* a full chip reset is used.
*/
return 0;
}
static int mv88x201x_interrupt_enable(struct cphy *cphy)
{
/* Enable PHY LASI interrupts. */
cphy_mdio_write(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_CTRL,
MDIO_PMA_LASI_LSALARM);
/* Enable Marvell interrupts through Elmer0. */
if (t1_is_asic(cphy->adapter)) {
u32 elmer;
t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer);
elmer |= ELMER0_GP_BIT6;
t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer);
}
return 0;
}
static int mv88x201x_interrupt_disable(struct cphy *cphy)
{
/* Disable PHY LASI interrupts. */
cphy_mdio_write(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_CTRL, 0x0);
/* Disable Marvell interrupts through Elmer0. */
if (t1_is_asic(cphy->adapter)) {
u32 elmer;
t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer);
elmer &= ~ELMER0_GP_BIT6;
t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer);
}
return 0;
}
static int mv88x201x_interrupt_clear(struct cphy *cphy)
{
u32 elmer;
u32 val;
#ifdef MV88x2010_LINK_STATUS_BUGS
/* Required to read twice before clear takes affect. */
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_RXSTAT, &val);
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_TXSTAT, &val);
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_STAT, &val);
/* Read this register after the others above it else
* the register doesn't clear correctly.
*/
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_STAT1, &val);
#endif
/* Clear link status. */
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_STAT1, &val);
/* Clear PHY LASI interrupts. */
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_STAT, &val);
#ifdef MV88x2010_LINK_STATUS_BUGS
/* Do it again. */
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_RXSTAT, &val);
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_PMA_LASI_TXSTAT, &val);
#endif
/* Clear Marvell interrupts through Elmer0. */
if (t1_is_asic(cphy->adapter)) {
t1_tpi_read(cphy->adapter, A_ELMER0_INT_CAUSE, &elmer);
elmer |= ELMER0_GP_BIT6;
t1_tpi_write(cphy->adapter, A_ELMER0_INT_CAUSE, elmer);
}
return 0;
}
static int mv88x201x_interrupt_handler(struct cphy *cphy)
{
/* Clear interrupts */
mv88x201x_interrupt_clear(cphy);
/* We have only enabled link change interrupts and so
* cphy_cause must be a link change interrupt.
*/
return cphy_cause_link_change;
}
static int mv88x201x_set_loopback(struct cphy *cphy, int on)
{
return 0;
}
static int mv88x201x_get_link_status(struct cphy *cphy, int *link_ok,
int *speed, int *duplex, int *fc)
{
u32 val = 0;
if (link_ok) {
/* Read link status. */
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_STAT1, &val);
val &= MDIO_STAT1_LSTATUS;
*link_ok = (val == MDIO_STAT1_LSTATUS);
/* Turn on/off Link LED */
led_link(cphy, *link_ok);
}
if (speed)
*speed = SPEED_10000;
if (duplex)
*duplex = DUPLEX_FULL;
if (fc)
*fc = PAUSE_RX | PAUSE_TX;
return 0;
}
static void mv88x201x_destroy(struct cphy *cphy)
{
kfree(cphy);
}
static const struct cphy_ops mv88x201x_ops = {
.destroy = mv88x201x_destroy,
.reset = mv88x201x_reset,
.interrupt_enable = mv88x201x_interrupt_enable,
.interrupt_disable = mv88x201x_interrupt_disable,
.interrupt_clear = mv88x201x_interrupt_clear,
.interrupt_handler = mv88x201x_interrupt_handler,
.get_link_status = mv88x201x_get_link_status,
.set_loopback = mv88x201x_set_loopback,
.mmds = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS |
MDIO_DEVS_PHYXS | MDIO_DEVS_WIS),
};
static struct cphy *mv88x201x_phy_create(struct net_device *dev, int phy_addr,
const struct mdio_ops *mdio_ops)
{
u32 val;
struct cphy *cphy = kzalloc(sizeof(*cphy), GFP_KERNEL);
if (!cphy)
return NULL;
cphy_init(cphy, dev, phy_addr, &mv88x201x_ops, mdio_ops);
/* Commands the PHY to enable XFP's clock. */
cphy_mdio_read(cphy, MDIO_MMD_PCS, 0x8300, &val);
cphy_mdio_write(cphy, MDIO_MMD_PCS, 0x8300, val | 1);
/* Clear link status. Required because of a bug in the PHY. */
cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_STAT2, &val);
cphy_mdio_read(cphy, MDIO_MMD_PCS, MDIO_STAT2, &val);
/* Allows for Link,Ack LED turn on/off */
led_init(cphy);
return cphy;
}
/* Chip Reset */
static int mv88x201x_phy_reset(adapter_t *adapter)
{
u32 val;
t1_tpi_read(adapter, A_ELMER0_GPO, &val);
val &= ~4;
t1_tpi_write(adapter, A_ELMER0_GPO, val);
msleep(100);
t1_tpi_write(adapter, A_ELMER0_GPO, val | 4);
msleep(1000);
/* Now lets enable the Laser. Delay 100us */
t1_tpi_read(adapter, A_ELMER0_GPO, &val);
val |= 0x8000;
t1_tpi_write(adapter, A_ELMER0_GPO, val);
udelay(100);
return 0;
}
const struct gphy t1_mv88x201x_ops = {
.create = mv88x201x_phy_create,
.reset = mv88x201x_phy_reset
};
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