mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
![Paul Gortmaker](/assets/img/avatar_default.png)
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. This covers everything under drivers/net except for wireless, which has been submitted separately. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
200 lines
4.6 KiB
C
200 lines
4.6 KiB
C
/* MOXA ART Ethernet (RTL8201CP) MDIO interface driver
|
|
*
|
|
* Copyright (C) 2013 Jonas Jensen <jonas.jensen@gmail.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/of_mdio.h>
|
|
#include <linux/phy.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regulator/consumer.h>
|
|
|
|
#define REG_PHY_CTRL 0
|
|
#define REG_PHY_WRITE_DATA 4
|
|
|
|
/* REG_PHY_CTRL */
|
|
#define MIIWR BIT(27) /* init write sequence (auto cleared)*/
|
|
#define MIIRD BIT(26)
|
|
#define REGAD_MASK 0x3e00000
|
|
#define PHYAD_MASK 0x1f0000
|
|
#define MIIRDATA_MASK 0xffff
|
|
|
|
/* REG_PHY_WRITE_DATA */
|
|
#define MIIWDATA_MASK 0xffff
|
|
|
|
struct moxart_mdio_data {
|
|
void __iomem *base;
|
|
};
|
|
|
|
static int moxart_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
|
|
{
|
|
struct moxart_mdio_data *data = bus->priv;
|
|
u32 ctrl = 0;
|
|
unsigned int count = 5;
|
|
|
|
dev_dbg(&bus->dev, "%s\n", __func__);
|
|
|
|
ctrl |= MIIRD | ((mii_id << 16) & PHYAD_MASK) |
|
|
((regnum << 21) & REGAD_MASK);
|
|
|
|
writel(ctrl, data->base + REG_PHY_CTRL);
|
|
|
|
do {
|
|
ctrl = readl(data->base + REG_PHY_CTRL);
|
|
|
|
if (!(ctrl & MIIRD))
|
|
return ctrl & MIIRDATA_MASK;
|
|
|
|
mdelay(10);
|
|
count--;
|
|
} while (count > 0);
|
|
|
|
dev_dbg(&bus->dev, "%s timed out\n", __func__);
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static int moxart_mdio_write(struct mii_bus *bus, int mii_id,
|
|
int regnum, u16 value)
|
|
{
|
|
struct moxart_mdio_data *data = bus->priv;
|
|
u32 ctrl = 0;
|
|
unsigned int count = 5;
|
|
|
|
dev_dbg(&bus->dev, "%s\n", __func__);
|
|
|
|
ctrl |= MIIWR | ((mii_id << 16) & PHYAD_MASK) |
|
|
((regnum << 21) & REGAD_MASK);
|
|
|
|
value &= MIIWDATA_MASK;
|
|
|
|
writel(value, data->base + REG_PHY_WRITE_DATA);
|
|
writel(ctrl, data->base + REG_PHY_CTRL);
|
|
|
|
do {
|
|
ctrl = readl(data->base + REG_PHY_CTRL);
|
|
|
|
if (!(ctrl & MIIWR))
|
|
return 0;
|
|
|
|
mdelay(10);
|
|
count--;
|
|
} while (count > 0);
|
|
|
|
dev_dbg(&bus->dev, "%s timed out\n", __func__);
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static int moxart_mdio_reset(struct mii_bus *bus)
|
|
{
|
|
int data, i;
|
|
|
|
for (i = 0; i < PHY_MAX_ADDR; i++) {
|
|
data = moxart_mdio_read(bus, i, MII_BMCR);
|
|
if (data < 0)
|
|
continue;
|
|
|
|
data |= BMCR_RESET;
|
|
if (moxart_mdio_write(bus, i, MII_BMCR, data) < 0)
|
|
continue;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int moxart_mdio_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct mii_bus *bus;
|
|
struct moxart_mdio_data *data;
|
|
struct resource *res;
|
|
int ret, i;
|
|
|
|
bus = mdiobus_alloc_size(sizeof(*data));
|
|
if (!bus)
|
|
return -ENOMEM;
|
|
|
|
bus->name = "MOXA ART Ethernet MII";
|
|
bus->read = &moxart_mdio_read;
|
|
bus->write = &moxart_mdio_write;
|
|
bus->reset = &moxart_mdio_reset;
|
|
snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d-mii", pdev->name, pdev->id);
|
|
bus->parent = &pdev->dev;
|
|
|
|
bus->irq = devm_kzalloc(&pdev->dev, sizeof(int) * PHY_MAX_ADDR,
|
|
GFP_KERNEL);
|
|
if (!bus->irq) {
|
|
ret = -ENOMEM;
|
|
goto err_out_free_mdiobus;
|
|
}
|
|
|
|
/* Setting PHY_IGNORE_INTERRUPT here even if it has no effect,
|
|
* of_mdiobus_register() sets these PHY_POLL.
|
|
* Ideally, the interrupt from MAC controller could be used to
|
|
* detect link state changes, not polling, i.e. if there was
|
|
* a way phy_driver could set PHY_HAS_INTERRUPT but have that
|
|
* interrupt handled in ethernet drivercode.
|
|
*/
|
|
for (i = 0; i < PHY_MAX_ADDR; i++)
|
|
bus->irq[i] = PHY_IGNORE_INTERRUPT;
|
|
|
|
data = bus->priv;
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
data->base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(data->base)) {
|
|
ret = PTR_ERR(data->base);
|
|
goto err_out_free_mdiobus;
|
|
}
|
|
|
|
ret = of_mdiobus_register(bus, np);
|
|
if (ret < 0)
|
|
goto err_out_free_mdiobus;
|
|
|
|
platform_set_drvdata(pdev, bus);
|
|
|
|
return 0;
|
|
|
|
err_out_free_mdiobus:
|
|
mdiobus_free(bus);
|
|
return ret;
|
|
}
|
|
|
|
static int moxart_mdio_remove(struct platform_device *pdev)
|
|
{
|
|
struct mii_bus *bus = platform_get_drvdata(pdev);
|
|
|
|
mdiobus_unregister(bus);
|
|
mdiobus_free(bus);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id moxart_mdio_dt_ids[] = {
|
|
{ .compatible = "moxa,moxart-mdio" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, moxart_mdio_dt_ids);
|
|
|
|
static struct platform_driver moxart_mdio_driver = {
|
|
.probe = moxart_mdio_probe,
|
|
.remove = moxart_mdio_remove,
|
|
.driver = {
|
|
.name = "moxart-mdio",
|
|
.of_match_table = moxart_mdio_dt_ids,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(moxart_mdio_driver);
|
|
|
|
MODULE_DESCRIPTION("MOXA ART MDIO interface driver");
|
|
MODULE_AUTHOR("Jonas Jensen <jonas.jensen@gmail.com>");
|
|
MODULE_LICENSE("GPL");
|