path: root/drivers/net/cxgb3/ael1002.c

/*
 * Copyright (c) 2005-2008 Chelsio, Inc. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#include "common.h"
#include "regs.h"

enum {
	AEL100X_TX_CONFIG1 = 0xc002,
	AEL1002_PWR_DOWN_HI = 0xc011,
	AEL1002_PWR_DOWN_LO = 0xc012,
	AEL1002_XFI_EQL = 0xc015,
	AEL1002_LB_EN = 0xc017,
	AEL_OPT_SETTINGS = 0xc017,
	AEL_I2C_CTRL = 0xc30a,
	AEL_I2C_DATA = 0xc30b,
	AEL_I2C_STAT = 0xc30c,
	AEL2005_GPIO_CTRL = 0xc214,
	AEL2005_GPIO_STAT = 0xc215,

	AEL2020_GPIO_INTR   = 0xc103,	/* Latch High (LH) */
	AEL2020_GPIO_CTRL   = 0xc108,	/* Store Clear (SC) */
	AEL2020_GPIO_STAT   = 0xc10c,	/* Read Only (RO) */
	AEL2020_GPIO_CFG    = 0xc110,	/* Read Write (RW) */

	AEL2020_GPIO_SDA    = 0,	/* IN: i2c serial data */
	AEL2020_GPIO_MODDET = 1,	/* IN: Module Detect */
	AEL2020_GPIO_0      = 3,	/* IN: unassigned */
	AEL2020_GPIO_1      = 2,	/* OUT: unassigned */
	AEL2020_GPIO_LSTAT  = AEL2020_GPIO_1, /* wired to link status LED */
};

enum { edc_none, edc_sr, edc_twinax };

/* PHY module I2C device address */
enum {
	MODULE_DEV_ADDR	= 0xa0,
	SFF_DEV_ADDR	= 0xa2,
};

/* PHY transceiver type */
enum {
	phy_transtype_unknown = 0,
	phy_transtype_sfp     = 3,
	phy_transtype_xfp     = 6,
};

#define AEL2005_MODDET_IRQ 4

struct reg_val {
	unsigned short mmd_addr;
	unsigned short reg_addr;
	unsigned short clear_bits;
	unsigned short set_bits;
};

static int set_phy_regs(struct cphy *phy, const struct reg_val *rv)
{
	int err;

	for (err = 0; rv->mmd_addr && !err; rv++) {
		if (rv->clear_bits == 0xffff)
			err = t3_mdio_write(phy, rv->mmd_addr, rv->reg_addr,
					    rv->set_bits);
		else
			err = t3_mdio_change_bits(phy, rv->mmd_addr,
						  rv->reg_addr, rv->clear_bits,
						  rv->set_bits);
	}
	return err;
}

static void ael100x_txon(struct cphy *phy)
{
	int tx_on_gpio =
		phy->mdio.prtad == 0 ? F_GPIO7_OUT_VAL : F_GPIO2_OUT_VAL;

	msleep(100);
	t3_set_reg_field(phy->adapter, A_T3DBG_GPIO_EN, 0, tx_on_gpio);
	msleep(30);
}

/*
 * Read an 8-bit word from a device attached to the PHY's i2c bus.
 */
static int ael_i2c_rd(struct cphy *phy, int dev_addr, int word_addr)
{
	int i, err;
	unsigned int stat, data;

	err = t3_mdio_write(phy, MDIO_MMD_PMAPMD, AEL_I2C_CTRL,
			    (dev_addr << 8) | (1 << 8) | word_addr);
	if (err)
		return err;

	for (i = 0; i < 200; i++) {
		msleep(1);
		err = t3_mdio_read(phy, MDIO_MMD_PMAPMD, AEL_I2C_STAT, &stat);
		if (err)
			return err;
		if ((stat & 3) == 1) {
			err = t3_mdio_read(phy, MDIO_MMD_PMAPMD, AEL_I2C_DATA,
					   &data);
			if (err)
				return err;
			return data >> 8;
		}
	}
	CH_WARN(phy->adapter, "PHY %u i2c read of dev.addr %#x.%#x timed out\n",
		phy->mdio.prtad, dev_addr, word_addr);
	return -ETIMEDOUT;
}

static int ael1002_power_down(struct cphy *phy, int enable)
{
	int err;

	err = t3_mdio_write(phy, MDIO_MMD_PMAPMD, MDIO_PMA_TXDIS, !!enable);
	if (!err)
		err = mdio_set_flag(&phy->mdio, phy->mdio.prtad,
				    MDIO_MMD_PMAPMD, MDIO_CTRL1,
				    MDIO_CTRL1_LPOWER, enable);
	return err;
}

static int ael1002_reset(struct cphy *phy, int wait)
{
	int err;

	if ((err = ael1002_power_down(phy, 0)) ||
	    (err = t3_mdio_write(phy, MDIO_MMD_PMAPMD, AEL100X_TX_CONFIG1, 1)) ||
	    (err =