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u-boot/drivers/net/phy/dp83867.c
Dan Murphy bc0e578f90 net: phy: Add support for TI PHY init 
ti_phy_init function was allocated to the DP83867 PHY.  This function
name is to generic for a specific PHY.  The function can be moved to a
TI specific file that can register all TI PHYs that are defined in the
defconfig.  The ti_phy_init file will contain all TI PHYs initialization
so that only phy_ti_init can be called from the framework.

In addition to the above the config flag for the DP83867 needs to be changed
in the Kconfig and dependent defconfig files. The config flag that was
used for the DP83867 was also generic in nature so a more specific
config flag for the DP83867 was created.

Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Dan Murphy <dmurphy@ti.com>
2020-06-12 13:17:23 -04:00

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// SPDX-License-Identifier: GPL-2.0
/*
* TI PHY drivers
*
*/
#include <common.h>
#include <log.h>
#include <phy.h>
#include <dm/devres.h>
#include <linux/bitops.h>
#include <linux/compat.h>
#include <malloc.h>
#include <dm.h>
#include <dt-bindings/net/ti-dp83867.h>
#include "ti_phy_init.h"
/* TI DP83867 */
#define DP83867_DEVADDR 0x1f
#define MII_DP83867_PHYCTRL 0x10
#define MII_DP83867_MICR 0x12
#define MII_DP83867_CFG2 0x14
#define MII_DP83867_BISCR 0x16
#define DP83867_CTRL 0x1f
/* Extended Registers */
#define DP83867_CFG4 0x0031
#define DP83867_RGMIICTL 0x0032
#define DP83867_STRAP_STS1 0x006E
#define DP83867_STRAP_STS2 0x006f
#define DP83867_RGMIIDCTL 0x0086
#define DP83867_IO_MUX_CFG 0x0170
#define DP83867_SGMIICTL 0x00D3
#define DP83867_SW_RESET BIT(15)
#define DP83867_SW_RESTART BIT(14)
/* MICR Interrupt bits */
#define MII_DP83867_MICR_AN_ERR_INT_EN BIT(15)
#define MII_DP83867_MICR_SPEED_CHNG_INT_EN BIT(14)
#define MII_DP83867_MICR_DUP_MODE_CHNG_INT_EN BIT(13)
#define MII_DP83867_MICR_PAGE_RXD_INT_EN BIT(12)
#define MII_DP83867_MICR_AUTONEG_COMP_INT_EN BIT(11)
#define MII_DP83867_MICR_LINK_STS_CHNG_INT_EN BIT(10)
#define MII_DP83867_MICR_FALSE_CARRIER_INT_EN BIT(8)
#define MII_DP83867_MICR_SLEEP_MODE_CHNG_INT_EN BIT(4)
#define MII_DP83867_MICR_WOL_INT_EN BIT(3)
#define MII_DP83867_MICR_XGMII_ERR_INT_EN BIT(2)
#define MII_DP83867_MICR_POL_CHNG_INT_EN BIT(1)
#define MII_DP83867_MICR_JABBER_INT_EN BIT(0)
/* RGMIICTL bits */
#define DP83867_RGMII_TX_CLK_DELAY_EN BIT(1)
#define DP83867_RGMII_RX_CLK_DELAY_EN BIT(0)
/* STRAP_STS1 bits */
#define DP83867_STRAP_STS1_RESERVED BIT(11)
/* STRAP_STS2 bits */
#define DP83867_STRAP_STS2_CLK_SKEW_TX_MASK GENMASK(6, 4)
#define DP83867_STRAP_STS2_CLK_SKEW_TX_SHIFT 4
#define DP83867_STRAP_STS2_CLK_SKEW_RX_MASK GENMASK(2, 0)
#define DP83867_STRAP_STS2_CLK_SKEW_RX_SHIFT 0
#define DP83867_STRAP_STS2_CLK_SKEW_NONE BIT(2)
/* PHY CTRL bits */
#define DP83867_PHYCR_FIFO_DEPTH_SHIFT 14
#define DP83867_PHYCR_FIFO_DEPTH_MASK GENMASK(15, 14)
#define DP83867_PHYCR_RESERVED_MASK BIT(11)
#define DP83867_PHYCR_FORCE_LINK_GOOD BIT(10)
#define DP83867_MDI_CROSSOVER 5
#define DP83867_MDI_CROSSOVER_MDIX 2
#define DP83867_PHYCTRL_SGMIIEN 0x0800
#define DP83867_PHYCTRL_RXFIFO_SHIFT 12
#define DP83867_PHYCTRL_TXFIFO_SHIFT 14
/* RGMIIDCTL bits */
#define DP83867_RGMII_TX_CLK_DELAY_MAX 0xf
#define DP83867_RGMII_TX_CLK_DELAY_SHIFT 4
#define DP83867_RGMII_RX_CLK_DELAY_MAX 0xf
/* CFG2 bits */
#define MII_DP83867_CFG2_SPEEDOPT_10EN 0x0040
#define MII_DP83867_CFG2_SGMII_AUTONEGEN 0x0080
#define MII_DP83867_CFG2_SPEEDOPT_ENH 0x0100
#define MII_DP83867_CFG2_SPEEDOPT_CNT 0x0800
#define MII_DP83867_CFG2_SPEEDOPT_INTLOW 0x2000
#define MII_DP83867_CFG2_MASK 0x003F
/* User setting - can be taken from DTS */
#define DEFAULT_FIFO_DEPTH DP83867_PHYCR_FIFO_DEPTH_4_B_NIB
/* IO_MUX_CFG bits */
#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL 0x1f
#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX 0x0
#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN 0x1f
#define DP83867_IO_MUX_CFG_CLK_O_DISABLE BIT(6)
#define DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT 8
#define DP83867_IO_MUX_CFG_CLK_O_SEL_MASK \
GENMASK(0x1f, DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT)
/* CFG4 bits */
#define DP83867_CFG4_PORT_MIRROR_EN BIT(0)
/* SGMIICTL bits */
#define DP83867_SGMII_TYPE BIT(14)
enum {
DP83867_PORT_MIRRORING_KEEP,
DP83867_PORT_MIRRORING_EN,
DP83867_PORT_MIRRORING_DIS,
};
struct dp83867_private {
u32 rx_id_delay;
u32 tx_id_delay;
int fifo_depth;
int io_impedance;
bool rxctrl_strap_quirk;
int port_mirroring;
bool set_clk_output;
unsigned int clk_output_sel;
bool sgmii_ref_clk_en;
};
static int dp83867_config_port_mirroring(struct phy_device *phydev)
{
struct dp83867_private *dp83867 =
(struct dp83867_private *)phydev->priv;
u16 val;
val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4);
if (dp83867->port_mirroring == DP83867_PORT_MIRRORING_EN)
val |= DP83867_CFG4_PORT_MIRROR_EN;
else
val &= ~DP83867_CFG4_PORT_MIRROR_EN;
phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_CFG4, val);
return 0;
}
#if defined(CONFIG_DM_ETH)
/**
* dp83867_data_init - Convenience function for setting PHY specific data
*
* @phydev: the phy_device struct
*/
static int dp83867_of_init(struct phy_device *phydev)
{
struct dp83867_private *dp83867 = phydev->priv;
ofnode node;
int ret;
node = phy_get_ofnode(phydev);
if (!ofnode_valid(node))
return -EINVAL;
/* Optional configuration */
ret = ofnode_read_u32(node, "ti,clk-output-sel",
&dp83867->clk_output_sel);
/* If not set, keep default */
if (!ret) {
dp83867->set_clk_output = true;
/* Valid values are 0 to DP83867_CLK_O_SEL_REF_CLK or
* DP83867_CLK_O_SEL_OFF.
*/
if (dp83867->clk_output_sel > DP83867_CLK_O_SEL_REF_CLK &&
dp83867->clk_output_sel != DP83867_CLK_O_SEL_OFF) {
pr_debug("ti,clk-output-sel value %u out of range\n",
dp83867->clk_output_sel);
return -EINVAL;
}
}
if (ofnode_read_bool(node, "ti,max-output-impedance"))
dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX;
else if (ofnode_read_bool(node, "ti,min-output-impedance"))
dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN;
else
dp83867->io_impedance = -EINVAL;
if (ofnode_read_bool(node, "ti,dp83867-rxctrl-strap-quirk"))
dp83867->rxctrl_strap_quirk = true;
/* Existing behavior was to use default pin strapping delay in rgmii
* mode, but rgmii should have meant no delay. Warn existing users.
*/
if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
u16 val = phy_read_mmd(phydev, DP83867_DEVADDR,
DP83867_STRAP_STS2);
u16 txskew = (val & DP83867_STRAP_STS2_CLK_SKEW_TX_MASK) >>
DP83867_STRAP_STS2_CLK_SKEW_TX_SHIFT;
u16 rxskew = (val & DP83867_STRAP_STS2_CLK_SKEW_RX_MASK) >>
DP83867_STRAP_STS2_CLK_SKEW_RX_SHIFT;
if (txskew != DP83867_STRAP_STS2_CLK_SKEW_NONE ||
rxskew != DP83867_STRAP_STS2_CLK_SKEW_NONE)
pr_warn("PHY has delays via pin strapping, but phy-mode = 'rgmii'\n"
"Should be 'rgmii-id' to use internal delays\n");
}
/* RX delay *must* be specified if internal delay of RX is used. */
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
ret = ofnode_read_u32(node, "ti,rx-internal-delay",
&dp83867->rx_id_delay);
if (ret) {
pr_debug("ti,rx-internal-delay must be specified\n");
return ret;
}
if (dp83867->rx_id_delay > DP83867_RGMII_RX_CLK_DELAY_MAX) {
pr_debug("ti,rx-internal-delay value of %u out of range\n",
dp83867->rx_id_delay);
return -EINVAL;
}
}
/* TX delay *must* be specified if internal delay of RX is used. */
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
ret = ofnode_read_u32(node, "ti,tx-internal-delay",
&dp83867->tx_id_delay);
if (ret) {
debug("ti,tx-internal-delay must be specified\n");
return ret;
}
if (dp83867->tx_id_delay > DP83867_RGMII_TX_CLK_DELAY_MAX) {
pr_debug("ti,tx-internal-delay value of %u out of range\n",
dp83867->tx_id_delay);
return -EINVAL;
}
}
dp83867->fifo_depth = ofnode_read_u32_default(node, "ti,fifo-depth",
DEFAULT_FIFO_DEPTH);
if (ofnode_read_bool(node, "enet-phy-lane-swap"))
dp83867->port_mirroring = DP83867_PORT_MIRRORING_EN;
if (ofnode_read_bool(node, "enet-phy-lane-no-swap"))
dp83867->port_mirroring = DP83867_PORT_MIRRORING_DIS;
if (ofnode_read_bool(node, "ti,sgmii-ref-clock-output-enable"))
dp83867->sgmii_ref_clk_en = true;
return 0;
}
#else
static int dp83867_of_init(struct phy_device *phydev)
{
struct dp83867_private *dp83867 = phydev->priv;
dp83867->rx_id_delay = DP83867_RGMIIDCTL_2_25_NS;
dp83867->tx_id_delay = DP83867_RGMIIDCTL_2_75_NS;
dp83867->fifo_depth = DEFAULT_FIFO_DEPTH;
dp83867->io_impedance = -EINVAL;
return 0;
}
#endif
static int dp83867_config(struct phy_device *phydev)
{
struct dp83867_private *dp83867;
unsigned int val, delay, cfg2;
int ret, bs;
dp83867 = (struct dp83867_private *)phydev->priv;
ret = dp83867_of_init(phydev);
if (ret)
return ret;
/* Restart the PHY. */
val = phy_read(phydev, MDIO_DEVAD_NONE, DP83867_CTRL);
phy_write(phydev, MDIO_DEVAD_NONE, DP83867_CTRL,
val | DP83867_SW_RESTART);
/* Mode 1 or 2 workaround */
if (dp83867->rxctrl_strap_quirk) {
val = phy_read_mmd(phydev, DP83867_DEVADDR,
DP83867_CFG4);
val &= ~BIT(7);
phy_write_mmd(phydev, DP83867_DEVADDR,
DP83867_CFG4, val);
}
if (phy_interface_is_rgmii(phydev)) {
val = phy_read(phydev, MDIO_DEVAD_NONE, MII_DP83867_PHYCTRL);
if (val < 0)
goto err_out;
val &= ~DP83867_PHYCR_FIFO_DEPTH_MASK;
val |= (dp83867->fifo_depth << DP83867_PHYCR_FIFO_DEPTH_SHIFT);
/* Do not force link good */
val &= ~DP83867_PHYCR_FORCE_LINK_GOOD;
/* The code below checks if "port mirroring" N/A MODE4 has been
* enabled during power on bootstrap.
*
* Such N/A mode enabled by mistake can put PHY IC in some
* internal testing mode and disable RGMII transmission.
*
* In this particular case one needs to check STRAP_STS1
* register's bit 11 (marked as RESERVED).
*/
bs = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_STRAP_STS1);
if (bs & DP83867_STRAP_STS1_RESERVED)
val &= ~DP83867_PHYCR_RESERVED_MASK;
ret = phy_write(phydev, MDIO_DEVAD_NONE,
MII_DP83867_PHYCTRL, val);
val = phy_read_mmd(phydev, DP83867_DEVADDR,
DP83867_RGMIICTL);
val &= ~(DP83867_RGMII_TX_CLK_DELAY_EN |
DP83867_RGMII_RX_CLK_DELAY_EN);
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
val |= (DP83867_RGMII_TX_CLK_DELAY_EN |
DP83867_RGMII_RX_CLK_DELAY_EN);
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
val |= DP83867_RGMII_TX_CLK_DELAY_EN;
if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
val |= DP83867_RGMII_RX_CLK_DELAY_EN;
phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIICTL, val);
delay = (dp83867->rx_id_delay |
(dp83867->tx_id_delay <<
DP83867_RGMII_TX_CLK_DELAY_SHIFT));
phy_write_mmd(phydev, DP83867_DEVADDR,
DP83867_RGMIIDCTL, delay);
}
if (phy_interface_is_sgmii(phydev)) {
if (dp83867->sgmii_ref_clk_en)
phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_SGMIICTL,
DP83867_SGMII_TYPE);
phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR,
(BMCR_ANENABLE | BMCR_FULLDPLX | BMCR_SPEED1000));
cfg2 = phy_read(phydev, phydev->addr, MII_DP83867_CFG2);
cfg2 &= MII_DP83867_CFG2_MASK;
cfg2 |= (MII_DP83867_CFG2_SPEEDOPT_10EN |
MII_DP83867_CFG2_SGMII_AUTONEGEN |
MII_DP83867_CFG2_SPEEDOPT_ENH |
MII_DP83867_CFG2_SPEEDOPT_CNT |
MII_DP83867_CFG2_SPEEDOPT_INTLOW);
phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_CFG2, cfg2);
phy_write_mmd(phydev, DP83867_DEVADDR,
DP83867_RGMIICTL, 0x0);
phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_PHYCTRL,
DP83867_PHYCTRL_SGMIIEN |
(DP83867_MDI_CROSSOVER_MDIX <<
DP83867_MDI_CROSSOVER) |
(dp83867->fifo_depth << DP83867_PHYCTRL_RXFIFO_SHIFT) |
(dp83867->fifo_depth << DP83867_PHYCTRL_TXFIFO_SHIFT));
phy_write(phydev, MDIO_DEVAD_NONE, MII_DP83867_BISCR, 0x0);
}
if (dp83867->io_impedance >= 0) {
val = phy_read_mmd(phydev,
DP83867_DEVADDR,
DP83867_IO_MUX_CFG);
val &= ~DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL;
val |= dp83867->io_impedance &
DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL;
phy_write_mmd(phydev, DP83867_DEVADDR,
DP83867_IO_MUX_CFG, val);
}
if (dp83867->port_mirroring != DP83867_PORT_MIRRORING_KEEP)
dp83867_config_port_mirroring(phydev);
/* Clock output selection if muxing property is set */
if (dp83867->set_clk_output) {
val = phy_read_mmd(phydev, DP83867_DEVADDR,
DP83867_IO_MUX_CFG);
if (dp83867->clk_output_sel == DP83867_CLK_O_SEL_OFF) {
val |= DP83867_IO_MUX_CFG_CLK_O_DISABLE;
} else {
val &= ~(DP83867_IO_MUX_CFG_CLK_O_SEL_MASK |
DP83867_IO_MUX_CFG_CLK_O_DISABLE);
val |= dp83867->clk_output_sel <<
DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT;
}
phy_write_mmd(phydev, DP83867_DEVADDR,
DP83867_IO_MUX_CFG, val);
}
genphy_config_aneg(phydev);
return 0;
err_out:
return ret;
}
static int dp83867_probe(struct phy_device *phydev)
{
struct dp83867_private *dp83867;
dp83867 = kzalloc(sizeof(*dp83867), GFP_KERNEL);
if (!dp83867)
return -ENOMEM;
phydev->priv = dp83867;
return 0;
}
static struct phy_driver DP83867_driver = {
.name = "TI DP83867",
.uid = 0x2000a231,
.mask = 0xfffffff0,
.features = PHY_GBIT_FEATURES,
.probe = dp83867_probe,
.config = &dp83867_config,
.startup = &genphy_startup,
.shutdown = &genphy_shutdown,
};
int phy_dp83867_init(void)
{
phy_register(&DP83867_driver);
return 0;
}
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