[deliverable/linux.git] / drivers / net / phy / icplus.c

/*
 * Driver for ICPlus PHYs
 *
 * Copyright (c) 2007 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/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>

MODULE_DESCRIPTION("ICPlus IP175C/IP101A/IC1001 PHY drivers");
MODULE_AUTHOR("Michael Barkowski");
MODULE_LICENSE("GPL");

/* IP101A/IP1001 */
#define IP10XX_SPEC_CTRL_STATUS		16  /* Spec. Control Register */
#define IP1001_SPEC_CTRL_STATUS_2	20  /* IP1001 Spec. Control Reg 2 */
#define IP1001_PHASE_SEL_MASK		3 /* IP1001 RX/TXPHASE_SEL */
#define IP1001_APS_ON			11  /* IP1001 APS Mode  bit */
#define IP101A_APS_ON			2   /* IP101A APS Mode bit */

static int ip175c_config_init(struct phy_device *phydev)
{
	int err, i;
	static int full_reset_performed = 0;

	if (full_reset_performed == 0) {

		/* master reset */
		err = mdiobus_write(phydev->bus, 30, 0, 0x175c);
		if (err < 0)
			return err;

		/* ensure no bus delays overlap reset period */
		err = mdiobus_read(phydev->bus, 30, 0);

		/* data sheet specifies reset period is 2 msec */
		mdelay(2);

		/* enable IP175C mode */
		err = mdiobus_write(phydev->bus, 29, 31, 0x175c);
		if (err < 0)
			return err;

		/* Set MII0 speed and duplex (in PHY mode) */
		err = mdiobus_write(phydev->bus, 29, 22, 0x420);
		if (err < 0)
			return err;

		/* reset switch ports */
		for (i = 0; i < 5; i++) {
			err = mdiobus_write(phydev->bus, i,
					    MII_BMCR, BMCR_RESET);
			if (err < 0)
				return err;
		}

		for (i = 0; i < 5; i++)
			err = mdiobus_read(phydev->bus, i, MII_BMCR);

		mdelay(2);

		full_reset_performed = 1;
	}

	if (phydev->addr != 4) {
		phydev->state = PHY_RUNNING;
		phydev->speed = SPEED_100;
		phydev->duplex = DUPLEX_FULL;
		phydev->link = 1;
		netif_carrier_on(phydev->attached_dev);
	}

	return 0;
}

static int ip1xx_reset(struct phy_device *phydev)
{
	int bmcr;

	/* Software Reset PHY */
	bmcr = phy_read(phydev, MII_BMCR);
	if (bmcr < 0)
		return bmcr;
	bmcr |= BMCR_RESET;
	bmcr = phy_write(phydev, MII_BMCR, bmcr);
	if (bmcr < 0)
		return bmcr;

	do {
		bmcr = phy_read(phydev, MII_BMCR);
		if (bmcr < 0)
			return bmcr;
	} while (bmcr & BMCR_RESET);

	return 0;
}

static int ip1001_config_init(struct phy_device *phydev)
{
	int c;

	c = ip1xx_reset(phydev);
	if (c < 0)
		return c;

	/* Enable Auto Power Saving mode */
	c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2);
	if (c < 0)
		return c;
	c |= IP1001_APS_ON;
	c = phy_write(phydev, IP1001_SPEC_CTRL_STATUS_2, c);
	if (c < 0)
		return c;

	if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
		/* Additional delay (2ns) used to adjust RX clock phase
		 * at RGMII interface */
		c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
		if (c < 0)
			return c;

		c |= IP1001_PHASE_SEL_MASK;
		c = phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
		if (c < 0)
			return c;
	}

	return 0;
}

static int ip101a_config_init(struct phy_device *phydev)
{
	int c;

	c = ip1xx_reset(phydev);
	if (c < 0)
		return c;

	/* Enable Auto Power Saving mode */
	c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
	c |= IP101A_APS_ON;
	return c;
}

static int ip175c_read_status(struct phy_device *phydev)
{
	if (phydev->addr == 4) /* WAN port */
		genphy_read_status(phydev);
	else
		/* Don't need to read status for switch ports */
		phydev->irq = PHY_IGNORE_INTERRUPT;

	return 0;
}

static int ip175c_config_aneg(struct phy_device *phydev)
{
	if (phydev->addr == 4) /* WAN port */
		genphy_config_aneg(phydev);

	return 0;
}

static struct phy_driver ip175c_driver = {
	.phy_id		= 0x02430d80,
	.name		= "ICPlus IP175C",
	.phy_id_mask	= 0x0ffffff0,
	.features	= PHY_BASIC_FEATURES,
	.config_init	= &ip175c_config_init,
	.config_aneg	= &ip175c_config_aneg,
	.read_status	= &ip175c_read_status,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
};

static struct phy_driver ip1001_driver = {
	.phy_id		= 0x02430d90,
	.name		= "ICPlus IP1001",
	.phy_id_mask	= 0x0ffffff0,
	.features	= PHY_GBIT_FEATURES | SUPPORTED_Pause |
			  SUPPORTED_Asym_Pause,
	.config_init	= &ip1001_config_init,
	.config_aneg	= &genphy_config_aneg,
	.read_status	= &genphy_read_status,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
};

static struct phy_driver ip101a_driver = {
	.phy_id		= 0x02430c54,
	.name		= "ICPlus IP101A",
	.phy_id_mask	= 0x0ffffff0,
	.features	= PHY_BASIC_FEATURES | SUPPORTED_Pause |
			  SUPPORTED_Asym_Pause,
	.config_init	= &ip101a_config_init,
	.config_aneg	= &genphy_config_aneg,
	.read_status	= &genphy_read_status,
	.suspend	= genphy_suspend,
	.resume		= genphy_resume,
	.driver		= { .owner = THIS_MODULE,},
};

static int __init icplus_init(void)
{
	int ret = 0;

	ret = phy_driver_register(&ip1001_driver);
	if (ret < 0)
		return -ENODEV;

	ret = phy_driver_register(&ip101a_driver);
	if (ret < 0)
		return -ENODEV;

	return phy_driver_register(&ip175c_driver);
}

static void __exit icplus_exit(void)
{
	phy_driver_unregister(&ip1001_driver);
	phy_driver_unregister(&ip101a_driver);
	phy_driver_unregister(&ip175c_driver);
}

module_init(icplus_init);
module_exit(icplus_exit);

static struct mdio_device_id __maybe_unused icplus_tbl[] = {
	{ 0x02430d80, 0x0ffffff0 },
	{ 0x02430d90, 0x0ffffff0 },
	{ }
};

MODULE_DEVICE_TABLE(mdio, icplus_tbl);
Commit	Line	Data
0cefeeba MB	1	/*
	2	* Driver for ICPlus PHYs
	3	*
	4	* Copyright (c) 2007 Freescale Semiconductor, Inc.
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2 of the License, or (at your
	9	* option) any later version.
	10	*
	11	*/
	12	#include <linux/kernel.h>
	13	#include <linux/string.h>
	14	#include <linux/errno.h>
	15	#include <linux/unistd.h>
0cefeeba MB	16	#include <linux/interrupt.h>
	17	#include <linux/init.h>
	18	#include <linux/delay.h>
	19	#include <linux/netdevice.h>
	20	#include <linux/etherdevice.h>
	21	#include <linux/skbuff.h>
	22	#include <linux/spinlock.h>
	23	#include <linux/mm.h>
	24	#include <linux/module.h>
	25	#include <linux/mii.h>
	26	#include <linux/ethtool.h>
	27	#include <linux/phy.h>
	28
	29	#include <asm/io.h>
	30	#include <asm/irq.h>
	31	#include <asm/uaccess.h>
	32
9c9b1f24	33	MODULE_DESCRIPTION("ICPlus IP175C/IP101A/IC1001 PHY drivers");
0cefeeba MB	34	MODULE_AUTHOR("Michael Barkowski");
	35	MODULE_LICENSE("GPL");
	36
9c9b1f24 GC	37	/* IP101A/IP1001 */
	38	#define IP10XX_SPEC_CTRL_STATUS 16 /* Spec. Control Register */
	39	#define IP1001_SPEC_CTRL_STATUS_2 20 /* IP1001 Spec. Control Reg 2 */
	40	#define IP1001_PHASE_SEL_MASK 3 /* IP1001 RX/TXPHASE_SEL */
	41	#define IP1001_APS_ON 11 /* IP1001 APS Mode bit */
	42	#define IP101A_APS_ON 2 /* IP101A APS Mode bit */
	43
0cefeeba MB	44	static int ip175c_config_init(struct phy_device *phydev)
	45	{
	46	int err, i;
	47	static int full_reset_performed = 0;
	48
	49	if (full_reset_performed == 0) {
	50
	51	/* master reset */
76231e02	52	err = mdiobus_write(phydev->bus, 30, 0, 0x175c);
0cefeeba MB	53	if (err < 0)
	54	return err;
	55
	56	/* ensure no bus delays overlap reset period */
76231e02	57	err = mdiobus_read(phydev->bus, 30, 0);
0cefeeba MB	58
	59	/* data sheet specifies reset period is 2 msec */
	60	mdelay(2);
	61
	62	/* enable IP175C mode */
76231e02	63	err = mdiobus_write(phydev->bus, 29, 31, 0x175c);
0cefeeba MB	64	if (err < 0)
	65	return err;
	66
	67	/* Set MII0 speed and duplex (in PHY mode) */
76231e02	68	err = mdiobus_write(phydev->bus, 29, 22, 0x420);
0cefeeba MB	69	if (err < 0)
	70	return err;
	71
	72	/* reset switch ports */
	73	for (i = 0; i < 5; i++) {
76231e02 DD	74	err = mdiobus_write(phydev->bus, i,
76231e02 DD	75	MII_BMCR, BMCR_RESET);
0cefeeba MB	76	if (err < 0)
	77	return err;
	78	}
	79
	80	for (i = 0; i < 5; i++)
76231e02	81	err = mdiobus_read(phydev->bus, i, MII_BMCR);
0cefeeba MB	82
	83	mdelay(2);
	84
	85	full_reset_performed = 1;
	86	}
	87
	88	if (phydev->addr != 4) {
	89	phydev->state = PHY_RUNNING;
	90	phydev->speed = SPEED_100;
	91	phydev->duplex = DUPLEX_FULL;
	92	phydev->link = 1;
	93	netif_carrier_on(phydev->attached_dev);
	94	}
	95
	96	return 0;
	97	}
	98
9c9b1f24	99	static int ip1xx_reset(struct phy_device *phydev)
377ecca9	100	{
b8e3995a	101	int bmcr;
377ecca9 GC	102
377ecca9 GC	103	/* Software Reset PHY */
9c9b1f24	104	bmcr = phy_read(phydev, MII_BMCR);
b8e3995a DM	105	if (bmcr < 0)
b8e3995a DM	106	return bmcr;
9c9b1f24	107	bmcr \|= BMCR_RESET;
b8e3995a DM	108	bmcr = phy_write(phydev, MII_BMCR, bmcr);
	109	if (bmcr < 0)
	110	return bmcr;
377ecca9 GC	111
377ecca9 GC	112	do {
9c9b1f24	113	bmcr = phy_read(phydev, MII_BMCR);
b8e3995a DM	114	if (bmcr < 0)
b8e3995a DM	115	return bmcr;
9c9b1f24 GC	116	} while (bmcr & BMCR_RESET);
9c9b1f24 GC	117
b8e3995a	118	return 0;
9c9b1f24 GC	119	}
	120
	121	static int ip1001_config_init(struct phy_device *phydev)
	122	{
	123	int c;
	124
	125	c = ip1xx_reset(phydev);
	126	if (c < 0)
	127	return c;
	128
	129	/* Enable Auto Power Saving mode */
	130	c = phy_read(phydev, IP1001_SPEC_CTRL_STATUS_2);
b8e3995a DM	131	if (c < 0)
b8e3995a DM	132	return c;
9c9b1f24	133	c \|= IP1001_APS_ON;
b8e3995a	134	c = phy_write(phydev, IP1001_SPEC_CTRL_STATUS_2, c);
9c9b1f24 GC	135	if (c < 0)
9c9b1f24 GC	136	return c;
377ecca9	137
a4886d52 GC	138	if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
	139	/* Additional delay (2ns) used to adjust RX clock phase
	140	* at RGMII interface */
	141	c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
b8e3995a DM	142	if (c < 0)
	143	return c;
	144
a4886d52 GC	145	c \|= IP1001_PHASE_SEL_MASK;
a4886d52 GC	146	c = phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
b8e3995a DM	147	if (c < 0)
b8e3995a DM	148	return c;
a4886d52	149	}
9c9b1f24	150
b8e3995a	151	return 0;
9c9b1f24 GC	152	}
	153
	154	static int ip101a_config_init(struct phy_device *phydev)
	155	{
	156	int c;
377ecca9	157
9c9b1f24 GC	158	c = ip1xx_reset(phydev);
	159	if (c < 0)
	160	return c;
	161
	162	/* Enable Auto Power Saving mode */
	163	c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
	164	c \|= IP101A_APS_ON;
	165	return c;
377ecca9 GC	166	}
377ecca9 GC	167
0cefeeba MB	168	static int ip175c_read_status(struct phy_device *phydev)
	169	{
	170	if (phydev->addr == 4) /* WAN port */
	171	genphy_read_status(phydev);
	172	else
	173	/* Don't need to read status for switch ports */
	174	phydev->irq = PHY_IGNORE_INTERRUPT;
	175
	176	return 0;
	177	}
	178
	179	static int ip175c_config_aneg(struct phy_device *phydev)
	180	{
	181	if (phydev->addr == 4) /* WAN port */
	182	genphy_config_aneg(phydev);
	183
	184	return 0;
	185	}
	186
	187	static struct phy_driver ip175c_driver = {
	188	.phy_id = 0x02430d80,
	189	.name = "ICPlus IP175C",
	190	.phy_id_mask = 0x0ffffff0,
	191	.features = PHY_BASIC_FEATURES,
	192	.config_init = &ip175c_config_init,
	193	.config_aneg = &ip175c_config_aneg,
	194	.read_status = &ip175c_read_status,
dab10863 GC	195	.suspend = genphy_suspend,
dab10863 GC	196	.resume = genphy_resume,
0cefeeba MB	197	.driver = { .owner = THIS_MODULE,},
	198	};
	199
377ecca9 GC	200	static struct phy_driver ip1001_driver = {
	201	.phy_id = 0x02430d90,
	202	.name = "ICPlus IP1001",
	203	.phy_id_mask = 0x0ffffff0,
	204	.features = PHY_GBIT_FEATURES \| SUPPORTED_Pause \|
	205	SUPPORTED_Asym_Pause,
	206	.config_init = &ip1001_config_init,
	207	.config_aneg = &genphy_config_aneg,
	208	.read_status = &genphy_read_status,
	209	.suspend = genphy_suspend,
	210	.resume = genphy_resume,
	211	.driver = { .owner = THIS_MODULE,},
	212	};
	213
9c9b1f24 GC	214	static struct phy_driver ip101a_driver = {
	215	.phy_id = 0x02430c54,
	216	.name = "ICPlus IP101A",
	217	.phy_id_mask = 0x0ffffff0,
	218	.features = PHY_BASIC_FEATURES \| SUPPORTED_Pause \|
	219	SUPPORTED_Asym_Pause,
	220	.config_init = &ip101a_config_init,
	221	.config_aneg = &genphy_config_aneg,
	222	.read_status = &genphy_read_status,
	223	.suspend = genphy_suspend,
	224	.resume = genphy_resume,
	225	.driver = { .owner = THIS_MODULE,},
	226	};
	227
377ecca9	228	static int __init icplus_init(void)
0cefeeba	229	{
377ecca9 GC	230	int ret = 0;
	231
	232	ret = phy_driver_register(&ip1001_driver);
	233	if (ret < 0)
	234	return -ENODEV;
	235
9c9b1f24 GC	236	ret = phy_driver_register(&ip101a_driver);
	237	if (ret < 0)
	238	return -ENODEV;
	239
0cefeeba MB	240	return phy_driver_register(&ip175c_driver);
	241	}
	242
377ecca9	243	static void __exit icplus_exit(void)
0cefeeba	244	{
377ecca9	245	phy_driver_unregister(&ip1001_driver);
9c9b1f24	246	phy_driver_unregister(&ip101a_driver);
0cefeeba MB	247	phy_driver_unregister(&ip175c_driver);
	248	}
	249
377ecca9 GC	250	module_init(icplus_init);
377ecca9 GC	251	module_exit(icplus_exit);
4e4f10f6	252
cf93c945	253	static struct mdio_device_id __maybe_unused icplus_tbl[] = {
4e4f10f6	254	{ 0x02430d80, 0x0ffffff0 },
377ecca9	255	{ 0x02430d90, 0x0ffffff0 },
4e4f10f6 DW	256	{ }
	257	};
	258
	259	MODULE_DEVICE_TABLE(mdio, icplus_tbl);