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linux/drivers/net/phy/bcm7xxx.c
Florian Fainelli a3622f2c82 net: phy: bcm7xxx: define constants for our registers 
Define constants for the various registers used in
bcm7xxx_28nm_afe_config_init() to help clarify what this workaround is
about.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-03-26 16:19:23 -04:00

360 lines
9.2 KiB
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/*
* Broadcom BCM7xxx internal transceivers support.
*
* Copyright (C) 2014, Broadcom Corporation
*
* 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/module.h>
#include <linux/phy.h>
#include <linux/delay.h>
#include <linux/bitops.h>
#include <linux/brcmphy.h>
/* Broadcom BCM7xxx internal PHY registers */
#define MII_BCM7XXX_CHANNEL_WIDTH 0x2000
/* 40nm only register definitions */
#define MII_BCM7XXX_100TX_AUX_CTL 0x10
#define MII_BCM7XXX_100TX_FALSE_CAR 0x13
#define MII_BCM7XXX_100TX_DISC 0x14
#define MII_BCM7XXX_AUX_MODE 0x1d
#define MII_BCM7XX_64CLK_MDIO BIT(12)
#define MII_BCM7XXX_CORE_BASE1E 0x1e
#define MII_BCM7XXX_TEST 0x1f
#define MII_BCM7XXX_SHD_MODE_2 BIT(2)
/* 28nm only register definitions */
#define MISC_ADDR(base, channel) base, channel
#define DSP_TAP10 MISC_ADDR(0x0a, 0)
#define PLL_PLLCTRL_1 MISC_ADDR(0x32, 1)
#define PLL_PLLCTRL_2 MISC_ADDR(0x32, 2)
#define PLL_PLLCTRL_4 MISC_ADDR(0x33, 0)
#define AFE_RXCONFIG_0 MISC_ADDR(0x38, 0)
#define AFE_RXCONFIG_1 MISC_ADDR(0x38, 1)
#define AFE_RX_LP_COUNTER MISC_ADDR(0x38, 3)
#define AFE_TX_CONFIG MISC_ADDR(0x39, 0)
#define AFE_HPF_TRIM_OTHERS MISC_ADDR(0x3a, 0)
#define CORE_EXPB0 0xb0
static int bcm7445_config_init(struct phy_device *phydev)
{
int ret;
const struct bcm7445_regs {
int reg;
u16 value;
} bcm7445_regs_cfg[] = {
/* increases ADC latency by 24ns */
{ MII_BCM54XX_EXP_SEL, 0x0038 },
{ MII_BCM54XX_EXP_DATA, 0xAB95 },
/* increases internal 1V LDO voltage by 5% */
{ MII_BCM54XX_EXP_SEL, 0x2038 },
{ MII_BCM54XX_EXP_DATA, 0xBB22 },
/* reduce RX low pass filter corner frequency */
{ MII_BCM54XX_EXP_SEL, 0x6038 },
{ MII_BCM54XX_EXP_DATA, 0xFFC5 },
/* reduce RX high pass filter corner frequency */
{ MII_BCM54XX_EXP_SEL, 0x003a },
{ MII_BCM54XX_EXP_DATA, 0x2002 },
};
unsigned int i;
for (i = 0; i < ARRAY_SIZE(bcm7445_regs_cfg); i++) {
ret = phy_write(phydev,
bcm7445_regs_cfg[i].reg,
bcm7445_regs_cfg[i].value);
if (ret)
return ret;
}
return 0;
}
static void phy_write_exp(struct phy_device *phydev,
u16 reg, u16 value)
{
phy_write(phydev, MII_BCM54XX_EXP_SEL, MII_BCM54XX_EXP_SEL_ER | reg);
phy_write(phydev, MII_BCM54XX_EXP_DATA, value);
}
static void phy_write_misc(struct phy_device *phydev,
u16 reg, u16 chl, u16 value)
{
int tmp;
phy_write(phydev, MII_BCM54XX_AUX_CTL, MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL);
tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA;
phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp);
tmp = (chl * MII_BCM7XXX_CHANNEL_WIDTH) | reg;
phy_write(phydev, MII_BCM54XX_EXP_SEL, tmp);
phy_write(phydev, MII_BCM54XX_EXP_DATA, value);
}
static int bcm7xxx_28nm_afe_config_init(struct phy_device *phydev)
{
/* write AFE_RXCONFIG_0 */
phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb19);
/* write AFE_RXCONFIG_1 */
phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9a3f);
/* write AFE_RX_LP_COUNTER */
phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc7);
/* write AFE_HPF_TRIM_OTHERS */
phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x000b);
/* write AFTE_TX_CONFIG */
phy_write_misc(phydev, AFE_TX_CONFIG, 0x0800);
/* Increase VCO range to prevent unlocking problem of PLL at low
* temp
*/
phy_write_misc(phydev, PLL_PLLCTRL_1, 0x0048);
/* Change Ki to 011 */
phy_write_misc(phydev, PLL_PLLCTRL_2, 0x021b);
/* Disable loading of TVCO buffer to bandgap, set bandgap trim
* to 111
*/
phy_write_misc(phydev, PLL_PLLCTRL_4, 0x0e20);
/* Adjust bias current trim by -3 */
phy_write_misc(phydev, DSP_TAP10, 0x690b);
/* Switch to CORE_BASE1E */
phy_write(phydev, MII_BCM7XXX_CORE_BASE1E, 0xd);
/* Reset R_CAL/RC_CAL Engine */
phy_write_exp(phydev, CORE_EXPB0, 0x0010);
/* Disable Reset R_CAL/RC_CAL Engine */
phy_write_exp(phydev, CORE_EXPB0, 0x0000);
return 0;
}
static int bcm7xxx_28nm_config_init(struct phy_device *phydev)
{
int ret;
ret = bcm7445_config_init(phydev);
if (ret)
return ret;
return bcm7xxx_28nm_afe_config_init(phydev);
}
static int phy_set_clr_bits(struct phy_device *dev, int location,
int set_mask, int clr_mask)
{
int v, ret;
v = phy_read(dev, location);
if (v < 0)
return v;
v &= ~clr_mask;
v |= set_mask;
ret = phy_write(dev, location, v);
if (ret < 0)
return ret;
return v;
}
static int bcm7xxx_config_init(struct phy_device *phydev)
{
int ret;
/* Enable 64 clock MDIO */
phy_write(phydev, MII_BCM7XXX_AUX_MODE, MII_BCM7XX_64CLK_MDIO);
phy_read(phydev, MII_BCM7XXX_AUX_MODE);
/* Workaround only required for 100Mbits/sec */
if (!(phydev->dev_flags & PHY_BRCM_100MBPS_WAR))
return 0;
/* set shadow mode 2 */
ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST,
MII_BCM7XXX_SHD_MODE_2, MII_BCM7XXX_SHD_MODE_2);
if (ret < 0)
return ret;
/* set iddq_clkbias */
phy_write(phydev, MII_BCM7XXX_100TX_DISC, 0x0F00);
udelay(10);
/* reset iddq_clkbias */
phy_write(phydev, MII_BCM7XXX_100TX_DISC, 0x0C00);
phy_write(phydev, MII_BCM7XXX_100TX_FALSE_CAR, 0x7555);
/* reset shadow mode 2 */
ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, MII_BCM7XXX_SHD_MODE_2, 0);
if (ret < 0)
return ret;
return 0;
}
/* Workaround for putting the PHY in IDDQ mode, required
* for all BCM7XXX PHYs
*/
static int bcm7xxx_suspend(struct phy_device *phydev)
{
int ret;
const struct bcm7xxx_regs {
int reg;
u16 value;
} bcm7xxx_suspend_cfg[] = {
{ MII_BCM7XXX_TEST, 0x008b },
{ MII_BCM7XXX_100TX_AUX_CTL, 0x01c0 },
{ MII_BCM7XXX_100TX_DISC, 0x7000 },
{ MII_BCM7XXX_TEST, 0x000f },
{ MII_BCM7XXX_100TX_AUX_CTL, 0x20d0 },
{ MII_BCM7XXX_TEST, 0x000b },
};
unsigned int i;
for (i = 0; i < ARRAY_SIZE(bcm7xxx_suspend_cfg); i++) {
ret = phy_write(phydev,
bcm7xxx_suspend_cfg[i].reg,
bcm7xxx_suspend_cfg[i].value);
if (ret)
return ret;
}
return 0;
}
static int bcm7xxx_dummy_config_init(struct phy_device *phydev)
{
return 0;
}
static struct phy_driver bcm7xxx_driver[] = {
{
.phy_id = PHY_ID_BCM7366,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM7366",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_IS_INTERNAL,
.config_init = bcm7xxx_28nm_afe_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.suspend = bcm7xxx_suspend,
.resume = bcm7xxx_28nm_afe_config_init,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM7439,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM7439",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_IS_INTERNAL,
.config_init = bcm7xxx_28nm_afe_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.suspend = bcm7xxx_suspend,
.resume = bcm7xxx_28nm_afe_config_init,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_ID_BCM7445,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM7445",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_IS_INTERNAL,
.config_init = bcm7xxx_28nm_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.suspend = bcm7xxx_suspend,
.resume = bcm7xxx_28nm_config_init,
.driver = { .owner = THIS_MODULE },
}, {
.name = "Broadcom BCM7XXX 28nm",
.phy_id = PHY_ID_BCM7XXX_28,
.phy_id_mask = PHY_BCM_OUI_MASK,
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_IS_INTERNAL,
.config_init = bcm7xxx_28nm_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.suspend = bcm7xxx_suspend,
.resume = bcm7xxx_28nm_config_init,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_BCM_OUI_4,
.phy_id_mask = 0xffff0000,
.name = "Broadcom BCM7XXX 40nm",
.features = PHY_GBIT_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_IS_INTERNAL,
.config_init = bcm7xxx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.suspend = bcm7xxx_suspend,
.resume = bcm7xxx_config_init,
.driver = { .owner = THIS_MODULE },
}, {
.phy_id = PHY_BCM_OUI_5,
.phy_id_mask = 0xffffff00,
.name = "Broadcom BCM7XXX 65nm",
.features = PHY_BASIC_FEATURES |
SUPPORTED_Pause | SUPPORTED_Asym_Pause,
.flags = PHY_IS_INTERNAL,
.config_init = bcm7xxx_dummy_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.suspend = bcm7xxx_suspend,
.resume = bcm7xxx_config_init,
.driver = { .owner = THIS_MODULE },
} };
static struct mdio_device_id __maybe_unused bcm7xxx_tbl[] = {
{ PHY_ID_BCM7366, 0xfffffff0, },
{ PHY_ID_BCM7439, 0xfffffff0, },
{ PHY_ID_BCM7445, 0xfffffff0, },
{ PHY_ID_BCM7XXX_28, 0xfffffc00 },
{ PHY_BCM_OUI_4, 0xffff0000 },
{ PHY_BCM_OUI_5, 0xffffff00 },
{ }
};
static int __init bcm7xxx_phy_init(void)
{
return phy_drivers_register(bcm7xxx_driver,
ARRAY_SIZE(bcm7xxx_driver));
}
static void __exit bcm7xxx_phy_exit(void)
{
phy_drivers_unregister(bcm7xxx_driver,
ARRAY_SIZE(bcm7xxx_driver));
}
module_init(bcm7xxx_phy_init);
module_exit(bcm7xxx_phy_exit);
MODULE_DEVICE_TABLE(mdio, bcm7xxx_tbl);
MODULE_DESCRIPTION("Broadcom BCM7xxx internal PHY driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Broadcom Corporation");
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