net: dsa: LAN9303: add MDIO managed mode support
When the LAN9303 device is in MDIO manged mode, all register accesses must be done via MDIO. Please note: this code is compile time tested only due to the absence of such configured hardware. It is based on a patch from Stefan Roese from 2014. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> CC: devicetree@vger.kernel.org CC: robh+dt@kernel.org CC: mark.rutland@arm.com CC: sr@denx.de Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Juergen Beisert
David S. Miller
parent
be4e119f99
commit
dc70058315
|
|
@ -3,7 +3,10 @@ SMSC/MicroChip LAN9303 three port ethernet switch
|
|||
|
||||
Required properties:
|
||||
|
||||
- compatible: should be "smsc,lan9303-i2c"
|
||||
- compatible: should be
|
||||
- "smsc,lan9303-i2c" for I2C managed mode
|
||||
or
|
||||
- "smsc,lan9303-mdio" for mdio managed mode
|
||||
|
||||
Optional properties:
|
||||
|
||||
|
|
@ -60,3 +63,43 @@ I2C managed mode:
|
|||
};
|
||||
};
|
||||
};
|
||||
|
||||
MDIO managed mode:
|
||||
|
||||
master: masterdevice@X {
|
||||
status = "okay";
|
||||
phy-handle = <&switch>;
|
||||
|
||||
mdio {
|
||||
#address-cells = <1>;
|
||||
#size-cells = <0>;
|
||||
|
||||
switch: switch-phy@0 {
|
||||
compatible = "smsc,lan9303-mdio";
|
||||
reg = <0>;
|
||||
reset-gpios = <&gpio7 6 GPIO_ACTIVE_LOW>;
|
||||
reset-duration = <100>;
|
||||
|
||||
ports {
|
||||
#address-cells = <1>;
|
||||
#size-cells = <0>;
|
||||
|
||||
port@0 {
|
||||
reg = <0>;
|
||||
label = "cpu";
|
||||
ethernet = <&master>;
|
||||
};
|
||||
|
||||
port@1 { /* external port 1 */
|
||||
reg = <1>;
|
||||
label = "lan1;
|
||||
};
|
||||
|
||||
port@2 { /* external port 2 */
|
||||
reg = <2>;
|
||||
label = "lan2";
|
||||
};
|
||||
};
|
||||
};
|
||||
};
|
||||
};
|
||||
|
|
|
|||
|
|
@ -66,4 +66,12 @@ config NET_DSA_SMSC_LAN9303_I2C
|
|||
Enable access functions if the SMSC/Microchip LAN9303 is configured
|
||||
for I2C managed mode.
|
||||
|
||||
config NET_DSA_SMSC_LAN9303_MDIO
|
||||
tristate "SMSC/Microchip LAN9303 3-ports 10/100 ethernet switch in MDIO managed mode"
|
||||
depends on NET_DSA
|
||||
select NET_DSA_SMSC_LAN9303
|
||||
---help---
|
||||
Enable access functions if the SMSC/Microchip LAN9303 is configured
|
||||
for MDIO managed mode.
|
||||
|
||||
endmenu
|
||||
|
|
|
|||
|
|
@ -5,6 +5,7 @@ obj-$(CONFIG_NET_DSA_QCA8K) += qca8k.o
|
|||
obj-$(CONFIG_NET_DSA_MT7530) += mt7530.o
|
||||
obj-$(CONFIG_NET_DSA_SMSC_LAN9303) += lan9303-core.o
|
||||
obj-$(CONFIG_NET_DSA_SMSC_LAN9303_I2C) += lan9303_i2c.o
|
||||
obj-$(CONFIG_NET_DSA_SMSC_LAN9303_MDIO) += lan9303_mdio.o
|
||||
obj-y += b53/
|
||||
obj-y += mv88e6xxx/
|
||||
obj-$(CONFIG_NET_DSA_LOOP) += dsa_loop.o dsa_loop_bdinfo.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,148 @@
|
|||
/*
|
||||
* Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de>
|
||||
*
|
||||
* Partially based on a patch from
|
||||
* Copyright (c) 2014 Stefan Roese <sr@denx.de>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* version 2, as published by the Free Software Foundation.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/mdio.h>
|
||||
#include <linux/phy.h>
|
||||
#include <linux/of.h>
|
||||
|
||||
#include "lan9303.h"
|
||||
|
||||
/* Generate phy-addr and -reg from the input address */
|
||||
#define PHY_ADDR(x) ((((x) >> 6) + 0x10) & 0x1f)
|
||||
#define PHY_REG(x) (((x) >> 1) & 0x1f)
|
||||
|
||||
struct lan9303_mdio {
|
||||
struct mdio_device *device;
|
||||
struct lan9303 chip;
|
||||
};
|
||||
|
||||
static void lan9303_mdio_real_write(struct mdio_device *mdio, int reg, u16 val)
|
||||
{
|
||||
mdio->bus->write(mdio->bus, PHY_ADDR(reg), PHY_REG(reg), val);
|
||||
}
|
||||
|
||||
static int lan9303_mdio_write(void *ctx, uint32_t reg, uint32_t val)
|
||||
{
|
||||
struct lan9303_mdio *sw_dev = (struct lan9303_mdio *)ctx;
|
||||
|
||||
mutex_lock(&sw_dev->device->bus->mdio_lock);
|
||||
lan9303_mdio_real_write(sw_dev->device, reg, val & 0xffff);
|
||||
lan9303_mdio_real_write(sw_dev->device, reg + 2, (val >> 16) & 0xffff);
|
||||
mutex_unlock(&sw_dev->device->bus->mdio_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static u16 lan9303_mdio_real_read(struct mdio_device *mdio, int reg)
|
||||
{
|
||||
return mdio->bus->read(mdio->bus, PHY_ADDR(reg), PHY_REG(reg));
|
||||
}
|
||||
|
||||
static int lan9303_mdio_read(void *ctx, uint32_t reg, uint32_t *val)
|
||||
{
|
||||
struct lan9303_mdio *sw_dev = (struct lan9303_mdio *)ctx;
|
||||
|
||||
mutex_lock(&sw_dev->device->bus->mdio_lock);
|
||||
*val = lan9303_mdio_real_read(sw_dev->device, reg);
|
||||
*val |= (lan9303_mdio_real_read(sw_dev->device, reg + 2) << 16);
|
||||
mutex_unlock(&sw_dev->device->bus->mdio_lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct regmap_config lan9303_mdio_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 32,
|
||||
.reg_stride = 1,
|
||||
.can_multi_write = true,
|
||||
.max_register = 0x0ff, /* address bits 0..1 are not used */
|
||||
.reg_format_endian = REGMAP_ENDIAN_LITTLE,
|
||||
|
||||
.volatile_table = &lan9303_register_set,
|
||||
.wr_table = &lan9303_register_set,
|
||||
.rd_table = &lan9303_register_set,
|
||||
|
||||
.reg_read = lan9303_mdio_read,
|
||||
.reg_write = lan9303_mdio_write,
|
||||
|
||||
.cache_type = REGCACHE_NONE,
|
||||
};
|
||||
|
||||
static int lan9303_mdio_probe(struct mdio_device *mdiodev)
|
||||
{
|
||||
struct lan9303_mdio *sw_dev;
|
||||
int ret;
|
||||
|
||||
sw_dev = devm_kzalloc(&mdiodev->dev, sizeof(struct lan9303_mdio),
|
||||
GFP_KERNEL);
|
||||
if (!sw_dev)
|
||||
return -ENOMEM;
|
||||
|
||||
sw_dev->chip.regmap = devm_regmap_init(&mdiodev->dev, NULL, sw_dev,
|
||||
&lan9303_mdio_regmap_config);
|
||||
if (IS_ERR(sw_dev->chip.regmap)) {
|
||||
ret = PTR_ERR(sw_dev->chip.regmap);
|
||||
dev_err(&mdiodev->dev, "regmap init failed: %d\n", ret);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* link forward and backward */
|
||||
sw_dev->device = mdiodev;
|
||||
dev_set_drvdata(&mdiodev->dev, sw_dev);
|
||||
sw_dev->chip.dev = &mdiodev->dev;
|
||||
|
||||
ret = lan9303_probe(&sw_dev->chip, mdiodev->dev.of_node);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
|
||||
dev_info(&mdiodev->dev, "LAN9303 MDIO driver loaded successfully\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void lan9303_mdio_remove(struct mdio_device *mdiodev)
|
||||
{
|
||||
struct lan9303_mdio *sw_dev = dev_get_drvdata(&mdiodev->dev);
|
||||
|
||||
if (!sw_dev)
|
||||
return;
|
||||
|
||||
lan9303_remove(&sw_dev->chip);
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
static const struct of_device_id lan9303_mdio_of_match[] = {
|
||||
{ .compatible = "smsc,lan9303-mdio" },
|
||||
{ /* sentinel */ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, lan9303_mdio_of_match);
|
||||
|
||||
static struct mdio_driver lan9303_mdio_driver = {
|
||||
.mdiodrv.driver = {
|
||||
.name = "LAN9303_MDIO",
|
||||
.of_match_table = of_match_ptr(lan9303_mdio_of_match),
|
||||
},
|
||||
.probe = lan9303_mdio_probe,
|
||||
.remove = lan9303_mdio_remove,
|
||||
};
|
||||
mdio_module_driver(lan9303_mdio_driver);
|
||||
|
||||
MODULE_AUTHOR("Stefan Roese <sr@denx.de>, Juergen Borleis <kernel@pengutronix.de>");
|
||||
MODULE_DESCRIPTION("Driver for SMSC/Microchip LAN9303 three port ethernet switch in MDIO managed mode");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue