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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Microchip ksz series register access through SPI
*
* Copyright (C) 2017 Microchip Technology Inc.
* Tristram Ha <Tristram.Ha@microchip.com>
*/
#include <asm/unaligned.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include "ksz_common.h"
#define KSZ8795_SPI_ADDR_SHIFT 12
#define KSZ8795_SPI_ADDR_ALIGN 3
#define KSZ8795_SPI_TURNAROUND_SHIFT 1
#define KSZ8863_SPI_ADDR_SHIFT 8
#define KSZ8863_SPI_ADDR_ALIGN 8
#define KSZ8863_SPI_TURNAROUND_SHIFT 0
#define KSZ9477_SPI_ADDR_SHIFT 24
#define KSZ9477_SPI_ADDR_ALIGN 3
#define KSZ9477_SPI_TURNAROUND_SHIFT 5
KSZ_REGMAP_TABLE(ksz8795, 16, KSZ8795_SPI_ADDR_SHIFT,
KSZ8795_SPI_TURNAROUND_SHIFT, KSZ8795_SPI_ADDR_ALIGN);
KSZ_REGMAP_TABLE(ksz8863, 16, KSZ8863_SPI_ADDR_SHIFT,
KSZ8863_SPI_TURNAROUND_SHIFT, KSZ8863_SPI_ADDR_ALIGN);
KSZ_REGMAP_TABLE(ksz9477, 32, KSZ9477_SPI_ADDR_SHIFT,
KSZ9477_SPI_TURNAROUND_SHIFT, KSZ9477_SPI_ADDR_ALIGN);
static int ksz_spi_probe(struct spi_device *spi)
{
const struct regmap_config *regmap_config;
const struct ksz_chip_data *chip;
struct device *ddev = &spi->dev;
struct regmap_config rc;
struct ksz_device *dev;
int i, ret = 0;
dev = ksz_switch_alloc(&spi->dev, spi);
if (!dev)
return -ENOMEM;
chip = device_get_match_data(ddev);
if (!chip)
return -EINVAL;
if (chip->chip_id == KSZ8830_CHIP_ID)
regmap_config = ksz8863_regmap_config;
else if (chip->chip_id == KSZ8795_CHIP_ID ||
chip->chip_id == KSZ8794_CHIP_ID ||
chip->chip_id == KSZ8765_CHIP_ID)
regmap_config = ksz8795_regmap_config;
else
regmap_config = ksz9477_regmap_config;
for (i = 0; i < __KSZ_NUM_REGMAPS; i++) {
rc = regmap_config[i];
rc.lock_arg = &dev->regmap_mutex;
rc.wr_table = chip->wr_table;
rc.rd_table = chip->rd_table;
dev->regmap[i] = devm_regmap_init_spi(spi, &rc);
if (IS_ERR(dev->regmap[i])) {
return dev_err_probe(&spi->dev, PTR_ERR(dev->regmap[i]),
"Failed to initialize regmap%i\n",
regmap_config[i].val_bits);
}
}
if (spi->dev.platform_data)
dev->pdata = spi->dev.platform_data;
/* setup spi */
spi->mode = SPI_MODE_3;
ret = spi_setup(spi);
if (ret)
return ret;
dev->irq = spi->irq;
ret = ksz_switch_register(dev);
/* Main DSA driver may not be started yet. */
if (ret)
return ret;
spi_set_drvdata(spi, dev);
return 0;
}
static void ksz_spi_remove(struct spi_device *spi)
{
struct ksz_device *dev = spi_get_drvdata(spi);
if (dev)
ksz_switch_remove(dev);
}
static void ksz_spi_shutdown(struct spi_device *spi)
{
struct ksz_device *dev = spi_get_drvdata(spi);
if (!dev)
return;
ksz_switch_shutdown(dev);
spi_set_drvdata(spi, NULL);
}
static const struct of_device_id ksz_dt_ids[] = {
{
.compatible = "microchip,ksz8765",
.data = &ksz_switch_chips[KSZ8765]
},
{
.compatible = "microchip,ksz8794",
.data = &ksz_switch_chips[KSZ8794]
},
{
.compatible = "microchip,ksz8795",
.data = &ksz_switch_chips[KSZ8795]
},
{
.compatible = "microchip,ksz8863",
.data = &ksz_switch_chips[KSZ8830]
},
{
.compatible = "microchip,ksz8873",
.data = &ksz_switch_chips[KSZ8830]
},
{
.compatible = "microchip,ksz9477",
.data = &ksz_switch_chips[KSZ9477]
},
{
.compatible = "microchip,ksz9896",
.data = &ksz_switch_chips[KSZ9896]
},
{
.compatible = "microchip,ksz9897",
.data = &ksz_switch_chips[KSZ9897]
},
{
.compatible = "microchip,ksz9893",
.data = &ksz_switch_chips[KSZ9893]
},
{
.compatible = "microchip,ksz9563",
.data = &ksz_switch_chips[KSZ9563]
},
{
.compatible = "microchip,ksz8563",
.data = &ksz_switch_chips[KSZ8563]
},
{
.compatible = "microchip,ksz8567",
.data = &ksz_switch_chips[KSZ8567]
},
{
.compatible = "microchip,ksz9567",
.data = &ksz_switch_chips[KSZ9567]
},
{
.compatible = "microchip,lan9370",
.data = &ksz_switch_chips[LAN9370]
},
{
.compatible = "microchip,lan9371",
.data = &ksz_switch_chips[LAN9371]
},
{
.compatible = "microchip,lan9372",
.data = &ksz_switch_chips[LAN9372]
},
{
.compatible = "microchip,lan9373",
.data = &ksz_switch_chips[LAN9373]
},
{
.compatible = "microchip,lan9374",
.data = &ksz_switch_chips[LAN9374]
},
{},
};
MODULE_DEVICE_TABLE(of, ksz_dt_ids);
static const struct spi_device_id ksz_spi_ids[] = {
{ "ksz8765" },
{ "ksz8794" },
{ "ksz8795" },
{ "ksz8863" },
{ "ksz8873" },
{ "ksz9477" },
{ "ksz9896" },
{ "ksz9897" },
{ "ksz9893" },
{ "ksz9563" },
{ "ksz8563" },
{ "ksz8567" },
{ "ksz9567" },
{ "lan9370" },
{ "lan9371" },
{ "lan9372" },
{ "lan9373" },
{ "lan9374" },
{ },
};
MODULE_DEVICE_TABLE(spi, ksz_spi_ids);
static struct spi_driver ksz_spi_driver = {
.driver = {
.name = "ksz-switch",
.of_match_table = ksz_dt_ids,
},
.id_table = ksz_spi_ids,
.probe = ksz_spi_probe,
.remove = ksz_spi_remove,
.shutdown = ksz_spi_shutdown,
};
module_spi_driver(ksz_spi_driver);
MODULE_ALIAS("spi:lan937x");
MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
MODULE_DESCRIPTION("Microchip ksz Series Switch SPI Driver");
MODULE_LICENSE("GPL");
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