marvell.c 10.8 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
/*
 * drivers/net/phy/marvell.c
 *
 * Driver for Marvell PHYs
 *
 * Author: Andy Fleming
 *
 * Copyright (c) 2004 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

#define MII_M1011_IEVENT		0x13
#define MII_M1011_IEVENT_CLEAR		0x0000

#define MII_M1011_IMASK			0x12
#define MII_M1011_IMASK_INIT		0x6400
#define MII_M1011_IMASK_CLEAR		0x0000

45 46 47 48 49 50 51 52 53 54 55 56
#define MII_M1011_PHY_SCR		0x10
#define MII_M1011_PHY_SCR_AUTO_CROSS	0x0060

#define MII_M1145_PHY_EXT_CR		0x14
#define MII_M1145_RGMII_RX_DELAY	0x0080
#define MII_M1145_RGMII_TX_DELAY	0x0002

#define M1145_DEV_FLAGS_RESISTANCE	0x00000001

#define MII_M1111_PHY_LED_CONTROL	0x18
#define MII_M1111_PHY_LED_DIRECT	0x4100
#define MII_M1111_PHY_LED_COMBINE	0x411c
57 58 59 60
#define MII_M1111_PHY_EXT_CR		0x14
#define MII_M1111_RX_DELAY		0x80
#define MII_M1111_TX_DELAY		0x2
#define MII_M1111_PHY_EXT_SR		0x1b
61 62 63 64

#define MII_M1111_HWCFG_MODE_MASK		0xf
#define MII_M1111_HWCFG_MODE_COPPER_RGMII	0xb
#define MII_M1111_HWCFG_MODE_FIBER_RGMII	0x3
65
#define MII_M1111_HWCFG_MODE_SGMII_NO_CLK	0x4
66 67 68 69 70 71 72 73 74 75 76 77 78 79
#define MII_M1111_HWCFG_FIBER_COPPER_AUTO	0x8000
#define MII_M1111_HWCFG_FIBER_COPPER_RES	0x2000

#define MII_M1111_COPPER		0
#define MII_M1111_FIBER			1

#define MII_M1011_PHY_STATUS		0x11
#define MII_M1011_PHY_STATUS_1000	0x8000
#define MII_M1011_PHY_STATUS_100	0x4000
#define MII_M1011_PHY_STATUS_SPD_MASK	0xc000
#define MII_M1011_PHY_STATUS_FULLDUPLEX	0x2000
#define MII_M1011_PHY_STATUS_RESOLVED	0x0800
#define MII_M1011_PHY_STATUS_LINK	0x0400

80

81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101
MODULE_DESCRIPTION("Marvell PHY driver");
MODULE_AUTHOR("Andy Fleming");
MODULE_LICENSE("GPL");

static int marvell_ack_interrupt(struct phy_device *phydev)
{
	int err;

	/* Clear the interrupts by reading the reg */
	err = phy_read(phydev, MII_M1011_IEVENT);

	if (err < 0)
		return err;

	return 0;
}

static int marvell_config_intr(struct phy_device *phydev)
{
	int err;

102
	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
		err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_INIT);
	else
		err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR);

	return err;
}

static int marvell_config_aneg(struct phy_device *phydev)
{
	int err;

	/* The Marvell PHY has an errata which requires
	 * that certain registers get written in order
	 * to restart autonegotiation */
	err = phy_write(phydev, MII_BMCR, BMCR_RESET);

	if (err < 0)
		return err;

	err = phy_write(phydev, 0x1d, 0x1f);
	if (err < 0)
		return err;

	err = phy_write(phydev, 0x1e, 0x200c);
	if (err < 0)
		return err;

	err = phy_write(phydev, 0x1d, 0x5);
	if (err < 0)
		return err;

	err = phy_write(phydev, 0x1e, 0);
	if (err < 0)
		return err;

	err = phy_write(phydev, 0x1e, 0x100);
	if (err < 0)
		return err;

142 143 144 145 146 147 148 149 150
	err = phy_write(phydev, MII_M1011_PHY_SCR,
			MII_M1011_PHY_SCR_AUTO_CROSS);
	if (err < 0)
		return err;

	err = phy_write(phydev, MII_M1111_PHY_LED_CONTROL,
			MII_M1111_PHY_LED_DIRECT);
	if (err < 0)
		return err;
151 152 153 154 155 156

	err = genphy_config_aneg(phydev);

	return err;
}

157 158 159
static int m88e1111_config_init(struct phy_device *phydev)
{
	int err;
160 161 162 163
	int temp;

	/* Enable Fiber/Copper auto selection */
	temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
164
	temp &= ~MII_M1111_HWCFG_FIBER_COPPER_AUTO;
165 166 167 168 169
	phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);

	temp = phy_read(phydev, MII_BMCR);
	temp |= BMCR_RESET;
	phy_write(phydev, MII_BMCR, temp);
170 171

	if ((phydev->interface == PHY_INTERFACE_MODE_RGMII) ||
172 173 174
	    (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) ||
	    (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) ||
	    (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)) {
175

176 177 178
		temp = phy_read(phydev, MII_M1111_PHY_EXT_CR);
		if (temp < 0)
			return temp;
179

180
		if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
181
			temp |= (MII_M1111_RX_DELAY | MII_M1111_TX_DELAY);
182 183 184 185 186 187
		} else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
			temp &= ~MII_M1111_TX_DELAY;
			temp |= MII_M1111_RX_DELAY;
		} else if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
			temp &= ~MII_M1111_RX_DELAY;
			temp |= MII_M1111_TX_DELAY;
188 189
		}

190 191 192 193
		err = phy_write(phydev, MII_M1111_PHY_EXT_CR, temp);
		if (err < 0)
			return err;

194 195 196 197 198
		temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
		if (temp < 0)
			return temp;

		temp &= ~(MII_M1111_HWCFG_MODE_MASK);
199

200
		if (temp & MII_M1111_HWCFG_FIBER_COPPER_RES)
201 202 203
			temp |= MII_M1111_HWCFG_MODE_FIBER_RGMII;
		else
			temp |= MII_M1111_HWCFG_MODE_COPPER_RGMII;
204 205 206 207 208 209

		err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
		if (err < 0)
			return err;
	}

210 211 212 213 214 215 216 217 218 219 220 221 222
	if (phydev->interface == PHY_INTERFACE_MODE_SGMII) {
		temp = phy_read(phydev, MII_M1111_PHY_EXT_SR);
		if (temp < 0)
			return temp;

		temp &= ~(MII_M1111_HWCFG_MODE_MASK);
		temp |= MII_M1111_HWCFG_MODE_SGMII_NO_CLK;

		err = phy_write(phydev, MII_M1111_PHY_EXT_SR, temp);
		if (err < 0)
			return err;
	}

223 224 225 226 227 228 229
	err = phy_write(phydev, MII_BMCR, BMCR_RESET);
	if (err < 0)
		return err;

	return 0;
}

230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250
static int m88e1145_config_init(struct phy_device *phydev)
{
	int err;

	/* Take care of errata E0 & E1 */
	err = phy_write(phydev, 0x1d, 0x001b);
	if (err < 0)
		return err;

	err = phy_write(phydev, 0x1e, 0x418f);
	if (err < 0)
		return err;

	err = phy_write(phydev, 0x1d, 0x0016);
	if (err < 0)
		return err;

	err = phy_write(phydev, 0x1e, 0xa2da);
	if (err < 0)
		return err;

251
	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290
		int temp = phy_read(phydev, MII_M1145_PHY_EXT_CR);
		if (temp < 0)
			return temp;

		temp |= (MII_M1145_RGMII_RX_DELAY | MII_M1145_RGMII_TX_DELAY);

		err = phy_write(phydev, MII_M1145_PHY_EXT_CR, temp);
		if (err < 0)
			return err;

		if (phydev->dev_flags & M1145_DEV_FLAGS_RESISTANCE) {
			err = phy_write(phydev, 0x1d, 0x0012);
			if (err < 0)
				return err;

			temp = phy_read(phydev, 0x1e);
			if (temp < 0)
				return temp;

			temp &= 0xf03f;
			temp |= 2 << 9;	/* 36 ohm */
			temp |= 2 << 6;	/* 39 ohm */

			err = phy_write(phydev, 0x1e, temp);
			if (err < 0)
				return err;

			err = phy_write(phydev, 0x1d, 0x3);
			if (err < 0)
				return err;

			err = phy_write(phydev, 0x1e, 0x8000);
			if (err < 0)
				return err;
		}
	}

	return 0;
}
291

292 293 294
/* marvell_read_status
 *
 * Generic status code does not detect Fiber correctly!
295
 * Description:
296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378
 *   Check the link, then figure out the current state
 *   by comparing what we advertise with what the link partner
 *   advertises.  Start by checking the gigabit possibilities,
 *   then move on to 10/100.
 */
static int marvell_read_status(struct phy_device *phydev)
{
	int adv;
	int err;
	int lpa;
	int status = 0;

	/* Update the link, but return if there
	 * was an error */
	err = genphy_update_link(phydev);
	if (err)
		return err;

	if (AUTONEG_ENABLE == phydev->autoneg) {
		status = phy_read(phydev, MII_M1011_PHY_STATUS);
		if (status < 0)
			return status;

		lpa = phy_read(phydev, MII_LPA);
		if (lpa < 0)
			return lpa;

		adv = phy_read(phydev, MII_ADVERTISE);
		if (adv < 0)
			return adv;

		lpa &= adv;

		if (status & MII_M1011_PHY_STATUS_FULLDUPLEX)
			phydev->duplex = DUPLEX_FULL;
		else
			phydev->duplex = DUPLEX_HALF;

		status = status & MII_M1011_PHY_STATUS_SPD_MASK;
		phydev->pause = phydev->asym_pause = 0;

		switch (status) {
		case MII_M1011_PHY_STATUS_1000:
			phydev->speed = SPEED_1000;
			break;

		case MII_M1011_PHY_STATUS_100:
			phydev->speed = SPEED_100;
			break;

		default:
			phydev->speed = SPEED_10;
			break;
		}

		if (phydev->duplex == DUPLEX_FULL) {
			phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
			phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
		}
	} else {
		int bmcr = phy_read(phydev, MII_BMCR);

		if (bmcr < 0)
			return bmcr;

		if (bmcr & BMCR_FULLDPLX)
			phydev->duplex = DUPLEX_FULL;
		else
			phydev->duplex = DUPLEX_HALF;

		if (bmcr & BMCR_SPEED1000)
			phydev->speed = SPEED_1000;
		else if (bmcr & BMCR_SPEED100)
			phydev->speed = SPEED_100;
		else
			phydev->speed = SPEED_10;

		phydev->pause = phydev->asym_pause = 0;
	}

	return 0;
}

O
Olof Johansson 已提交
379 380 381 382 383 384 385 386 387 388 389
static struct phy_driver marvell_drivers[] = {
	{
		.phy_id = 0x01410c60,
		.phy_id_mask = 0xfffffff0,
		.name = "Marvell 88E1101",
		.features = PHY_GBIT_FEATURES,
		.flags = PHY_HAS_INTERRUPT,
		.config_aneg = &marvell_config_aneg,
		.read_status = &genphy_read_status,
		.ack_interrupt = &marvell_ack_interrupt,
		.config_intr = &marvell_config_intr,
390
		.driver = { .owner = THIS_MODULE },
O
Olof Johansson 已提交
391
	},
392 393 394 395 396 397 398 399 400 401 402
	{
		.phy_id = 0x01410c90,
		.phy_id_mask = 0xfffffff0,
		.name = "Marvell 88E1112",
		.features = PHY_GBIT_FEATURES,
		.flags = PHY_HAS_INTERRUPT,
		.config_init = &m88e1111_config_init,
		.config_aneg = &marvell_config_aneg,
		.read_status = &genphy_read_status,
		.ack_interrupt = &marvell_ack_interrupt,
		.config_intr = &marvell_config_intr,
403
		.driver = { .owner = THIS_MODULE },
404
	},
O
Olof Johansson 已提交
405 406 407 408 409 410 411 412
	{
		.phy_id = 0x01410cc0,
		.phy_id_mask = 0xfffffff0,
		.name = "Marvell 88E1111",
		.features = PHY_GBIT_FEATURES,
		.flags = PHY_HAS_INTERRUPT,
		.config_init = &m88e1111_config_init,
		.config_aneg = &marvell_config_aneg,
413
		.read_status = &marvell_read_status,
O
Olof Johansson 已提交
414 415
		.ack_interrupt = &marvell_ack_interrupt,
		.config_intr = &marvell_config_intr,
416
		.driver = { .owner = THIS_MODULE },
O
Olof Johansson 已提交
417 418 419 420 421 422 423 424 425 426 427 428
	},
	{
		.phy_id = 0x01410cd0,
		.phy_id_mask = 0xfffffff0,
		.name = "Marvell 88E1145",
		.features = PHY_GBIT_FEATURES,
		.flags = PHY_HAS_INTERRUPT,
		.config_init = &m88e1145_config_init,
		.config_aneg = &marvell_config_aneg,
		.read_status = &genphy_read_status,
		.ack_interrupt = &marvell_ack_interrupt,
		.config_intr = &marvell_config_intr,
429 430 431 432 433 434 435 436 437 438 439 440 441 442 443
		.driver = { .owner = THIS_MODULE },
	},
	{
		.phy_id = 0x01410e30,
		.phy_id_mask = 0xfffffff0,
		.name = "Marvell 88E1240",
		.features = PHY_GBIT_FEATURES,
		.flags = PHY_HAS_INTERRUPT,
		.config_init = &m88e1111_config_init,
		.config_aneg = &marvell_config_aneg,
		.read_status = &genphy_read_status,
		.ack_interrupt = &marvell_ack_interrupt,
		.config_intr = &marvell_config_intr,
		.driver = { .owner = THIS_MODULE },
	},
444 445 446 447
};

static int __init marvell_init(void)
{
448
	int ret;
O
Olof Johansson 已提交
449
	int i;
450

O
Olof Johansson 已提交
451 452
	for (i = 0; i < ARRAY_SIZE(marvell_drivers); i++) {
		ret = phy_driver_register(&marvell_drivers[i]);
453

O
Olof Johansson 已提交
454 455 456 457 458 459
		if (ret) {
			while (i-- > 0)
				phy_driver_unregister(&marvell_drivers[i]);
			return ret;
		}
	}
460 461

	return 0;
462 463 464 465
}

static void __exit marvell_exit(void)
{
O
Olof Johansson 已提交
466 467 468 469
	int i;

	for (i = 0; i < ARRAY_SIZE(marvell_drivers); i++)
		phy_driver_unregister(&marvell_drivers[i]);
470 471 472 473
}

module_init(marvell_init);
module_exit(marvell_exit);