14658f2feSArun Ramadoss // SPDX-License-Identifier: GPL-2.0-or-later
24658f2feSArun Ramadoss /*
34658f2feSArun Ramadoss * Microchip ksz series register access through SPI
44658f2feSArun Ramadoss *
54658f2feSArun Ramadoss * Copyright (C) 2017 Microchip Technology Inc.
64658f2feSArun Ramadoss * Tristram Ha <Tristram.Ha@microchip.com>
74658f2feSArun Ramadoss */
84658f2feSArun Ramadoss
94658f2feSArun Ramadoss #include <asm/unaligned.h>
104658f2feSArun Ramadoss
114658f2feSArun Ramadoss #include <linux/delay.h>
124658f2feSArun Ramadoss #include <linux/kernel.h>
134658f2feSArun Ramadoss #include <linux/module.h>
144658f2feSArun Ramadoss #include <linux/regmap.h>
154658f2feSArun Ramadoss #include <linux/spi/spi.h>
164658f2feSArun Ramadoss
174658f2feSArun Ramadoss #include "ksz_common.h"
184658f2feSArun Ramadoss
194658f2feSArun Ramadoss #define KSZ8795_SPI_ADDR_SHIFT 12
204658f2feSArun Ramadoss #define KSZ8795_SPI_ADDR_ALIGN 3
214658f2feSArun Ramadoss #define KSZ8795_SPI_TURNAROUND_SHIFT 1
224658f2feSArun Ramadoss
234658f2feSArun Ramadoss #define KSZ8863_SPI_ADDR_SHIFT 8
244658f2feSArun Ramadoss #define KSZ8863_SPI_ADDR_ALIGN 8
254658f2feSArun Ramadoss #define KSZ8863_SPI_TURNAROUND_SHIFT 0
264658f2feSArun Ramadoss
274658f2feSArun Ramadoss #define KSZ9477_SPI_ADDR_SHIFT 24
284658f2feSArun Ramadoss #define KSZ9477_SPI_ADDR_ALIGN 3
294658f2feSArun Ramadoss #define KSZ9477_SPI_TURNAROUND_SHIFT 5
304658f2feSArun Ramadoss
314658f2feSArun Ramadoss KSZ_REGMAP_TABLE(ksz8795, 16, KSZ8795_SPI_ADDR_SHIFT,
324658f2feSArun Ramadoss KSZ8795_SPI_TURNAROUND_SHIFT, KSZ8795_SPI_ADDR_ALIGN);
334658f2feSArun Ramadoss
344658f2feSArun Ramadoss KSZ_REGMAP_TABLE(ksz8863, 16, KSZ8863_SPI_ADDR_SHIFT,
354658f2feSArun Ramadoss KSZ8863_SPI_TURNAROUND_SHIFT, KSZ8863_SPI_ADDR_ALIGN);
364658f2feSArun Ramadoss
374658f2feSArun Ramadoss KSZ_REGMAP_TABLE(ksz9477, 32, KSZ9477_SPI_ADDR_SHIFT,
384658f2feSArun Ramadoss KSZ9477_SPI_TURNAROUND_SHIFT, KSZ9477_SPI_ADDR_ALIGN);
394658f2feSArun Ramadoss
ksz_spi_probe(struct spi_device * spi)404658f2feSArun Ramadoss static int ksz_spi_probe(struct spi_device *spi)
414658f2feSArun Ramadoss {
424658f2feSArun Ramadoss const struct regmap_config *regmap_config;
434658f2feSArun Ramadoss const struct ksz_chip_data *chip;
444658f2feSArun Ramadoss struct device *ddev = &spi->dev;
454658f2feSArun Ramadoss struct regmap_config rc;
464658f2feSArun Ramadoss struct ksz_device *dev;
474658f2feSArun Ramadoss int i, ret = 0;
484658f2feSArun Ramadoss
4947d82864SArun Ramadoss dev = ksz_switch_alloc(&spi->dev, spi);
504658f2feSArun Ramadoss if (!dev)
514658f2feSArun Ramadoss return -ENOMEM;
524658f2feSArun Ramadoss
534658f2feSArun Ramadoss chip = device_get_match_data(ddev);
544658f2feSArun Ramadoss if (!chip)
554658f2feSArun Ramadoss return -EINVAL;
564658f2feSArun Ramadoss
574658f2feSArun Ramadoss if (chip->chip_id == KSZ8830_CHIP_ID)
584658f2feSArun Ramadoss regmap_config = ksz8863_regmap_config;
594658f2feSArun Ramadoss else if (chip->chip_id == KSZ8795_CHIP_ID ||
604658f2feSArun Ramadoss chip->chip_id == KSZ8794_CHIP_ID ||
614658f2feSArun Ramadoss chip->chip_id == KSZ8765_CHIP_ID)
624658f2feSArun Ramadoss regmap_config = ksz8795_regmap_config;
634658f2feSArun Ramadoss else
644658f2feSArun Ramadoss regmap_config = ksz9477_regmap_config;
654658f2feSArun Ramadoss
66*b8311f46SVladimir Oltean for (i = 0; i < __KSZ_NUM_REGMAPS; i++) {
674658f2feSArun Ramadoss rc = regmap_config[i];
684658f2feSArun Ramadoss rc.lock_arg = &dev->regmap_mutex;
69ec6ba50cSOleksij Rempel rc.wr_table = chip->wr_table;
70ec6ba50cSOleksij Rempel rc.rd_table = chip->rd_table;
714658f2feSArun Ramadoss dev->regmap[i] = devm_regmap_init_spi(spi, &rc);
72ec6ba50cSOleksij Rempel
734658f2feSArun Ramadoss if (IS_ERR(dev->regmap[i])) {
749b183317SRakesh Sankaranarayanan return dev_err_probe(&spi->dev, PTR_ERR(dev->regmap[i]),
759b183317SRakesh Sankaranarayanan "Failed to initialize regmap%i\n",
769b183317SRakesh Sankaranarayanan regmap_config[i].val_bits);
774658f2feSArun Ramadoss }
784658f2feSArun Ramadoss }
794658f2feSArun Ramadoss
804658f2feSArun Ramadoss if (spi->dev.platform_data)
814658f2feSArun Ramadoss dev->pdata = spi->dev.platform_data;
824658f2feSArun Ramadoss
834658f2feSArun Ramadoss /* setup spi */
844658f2feSArun Ramadoss spi->mode = SPI_MODE_3;
854658f2feSArun Ramadoss ret = spi_setup(spi);
864658f2feSArun Ramadoss if (ret)
874658f2feSArun Ramadoss return ret;
884658f2feSArun Ramadoss
89c9cd961cSArun Ramadoss dev->irq = spi->irq;
90c9cd961cSArun Ramadoss
914658f2feSArun Ramadoss ret = ksz_switch_register(dev);
924658f2feSArun Ramadoss
934658f2feSArun Ramadoss /* Main DSA driver may not be started yet. */
944658f2feSArun Ramadoss if (ret)
954658f2feSArun Ramadoss return ret;
964658f2feSArun Ramadoss
974658f2feSArun Ramadoss spi_set_drvdata(spi, dev);
984658f2feSArun Ramadoss
994658f2feSArun Ramadoss return 0;
1004658f2feSArun Ramadoss }
1014658f2feSArun Ramadoss
ksz_spi_remove(struct spi_device * spi)1024658f2feSArun Ramadoss static void ksz_spi_remove(struct spi_device *spi)
1034658f2feSArun Ramadoss {
1044658f2feSArun Ramadoss struct ksz_device *dev = spi_get_drvdata(spi);
1054658f2feSArun Ramadoss
1064658f2feSArun Ramadoss if (dev)
1074658f2feSArun Ramadoss ksz_switch_remove(dev);
1084658f2feSArun Ramadoss }
1094658f2feSArun Ramadoss
ksz_spi_shutdown(struct spi_device * spi)1104658f2feSArun Ramadoss static void ksz_spi_shutdown(struct spi_device *spi)
1114658f2feSArun Ramadoss {
1124658f2feSArun Ramadoss struct ksz_device *dev = spi_get_drvdata(spi);
1134658f2feSArun Ramadoss
1144658f2feSArun Ramadoss if (!dev)
1154658f2feSArun Ramadoss return;
1164658f2feSArun Ramadoss
1174658f2feSArun Ramadoss if (dev->dev_ops->reset)
1184658f2feSArun Ramadoss dev->dev_ops->reset(dev);
1194658f2feSArun Ramadoss
1204658f2feSArun Ramadoss dsa_switch_shutdown(dev->ds);
1214658f2feSArun Ramadoss
1224658f2feSArun Ramadoss spi_set_drvdata(spi, NULL);
1234658f2feSArun Ramadoss }
1244658f2feSArun Ramadoss
1254658f2feSArun Ramadoss static const struct of_device_id ksz_dt_ids[] = {
1264658f2feSArun Ramadoss {
1274658f2feSArun Ramadoss .compatible = "microchip,ksz8765",
1284658f2feSArun Ramadoss .data = &ksz_switch_chips[KSZ8765]
1294658f2feSArun Ramadoss },
1304658f2feSArun Ramadoss {
1314658f2feSArun Ramadoss .compatible = "microchip,ksz8794",
1324658f2feSArun Ramadoss .data = &ksz_switch_chips[KSZ8794]
1334658f2feSArun Ramadoss },
1344658f2feSArun Ramadoss {
1354658f2feSArun Ramadoss .compatible = "microchip,ksz8795",
1364658f2feSArun Ramadoss .data = &ksz_switch_chips[KSZ8795]
1374658f2feSArun Ramadoss },
1384658f2feSArun Ramadoss {
1394658f2feSArun Ramadoss .compatible = "microchip,ksz8863",
1404658f2feSArun Ramadoss .data = &ksz_switch_chips[KSZ8830]
1414658f2feSArun Ramadoss },
1424658f2feSArun Ramadoss {
1434658f2feSArun Ramadoss .compatible = "microchip,ksz8873",
1444658f2feSArun Ramadoss .data = &ksz_switch_chips[KSZ8830]
1454658f2feSArun Ramadoss },
1464658f2feSArun Ramadoss {
1474658f2feSArun Ramadoss .compatible = "microchip,ksz9477",
1484658f2feSArun Ramadoss .data = &ksz_switch_chips[KSZ9477]
1494658f2feSArun Ramadoss },
1504658f2feSArun Ramadoss {
1512eb3ff3cSRomain Naour .compatible = "microchip,ksz9896",
1522eb3ff3cSRomain Naour .data = &ksz_switch_chips[KSZ9896]
1532eb3ff3cSRomain Naour },
1542eb3ff3cSRomain Naour {
1554658f2feSArun Ramadoss .compatible = "microchip,ksz9897",
1564658f2feSArun Ramadoss .data = &ksz_switch_chips[KSZ9897]
1574658f2feSArun Ramadoss },
1584658f2feSArun Ramadoss {
1594658f2feSArun Ramadoss .compatible = "microchip,ksz9893",
1604658f2feSArun Ramadoss .data = &ksz_switch_chips[KSZ9893]
1614658f2feSArun Ramadoss },
1624658f2feSArun Ramadoss {
1634658f2feSArun Ramadoss .compatible = "microchip,ksz9563",
164ef912fe4SRakesh Sankaranarayanan .data = &ksz_switch_chips[KSZ9563]
1654658f2feSArun Ramadoss },
1664658f2feSArun Ramadoss {
1674658f2feSArun Ramadoss .compatible = "microchip,ksz8563",
168b4490809SOleksij Rempel .data = &ksz_switch_chips[KSZ8563]
1694658f2feSArun Ramadoss },
1704658f2feSArun Ramadoss {
1714658f2feSArun Ramadoss .compatible = "microchip,ksz9567",
1724658f2feSArun Ramadoss .data = &ksz_switch_chips[KSZ9567]
1734658f2feSArun Ramadoss },
174c8fac9d0SArun Ramadoss {
175c8fac9d0SArun Ramadoss .compatible = "microchip,lan9370",
176c8fac9d0SArun Ramadoss .data = &ksz_switch_chips[LAN9370]
177c8fac9d0SArun Ramadoss },
178c8fac9d0SArun Ramadoss {
179c8fac9d0SArun Ramadoss .compatible = "microchip,lan9371",
180c8fac9d0SArun Ramadoss .data = &ksz_switch_chips[LAN9371]
181c8fac9d0SArun Ramadoss },
182c8fac9d0SArun Ramadoss {
183c8fac9d0SArun Ramadoss .compatible = "microchip,lan9372",
184c8fac9d0SArun Ramadoss .data = &ksz_switch_chips[LAN9372]
185c8fac9d0SArun Ramadoss },
186c8fac9d0SArun Ramadoss {
187c8fac9d0SArun Ramadoss .compatible = "microchip,lan9373",
188c8fac9d0SArun Ramadoss .data = &ksz_switch_chips[LAN9373]
189c8fac9d0SArun Ramadoss },
190c8fac9d0SArun Ramadoss {
191c8fac9d0SArun Ramadoss .compatible = "microchip,lan9374",
192c8fac9d0SArun Ramadoss .data = &ksz_switch_chips[LAN9374]
193c8fac9d0SArun Ramadoss },
1944658f2feSArun Ramadoss {},
1954658f2feSArun Ramadoss };
1964658f2feSArun Ramadoss MODULE_DEVICE_TABLE(of, ksz_dt_ids);
1974658f2feSArun Ramadoss
1984658f2feSArun Ramadoss static const struct spi_device_id ksz_spi_ids[] = {
1994658f2feSArun Ramadoss { "ksz8765" },
2004658f2feSArun Ramadoss { "ksz8794" },
2014658f2feSArun Ramadoss { "ksz8795" },
2024658f2feSArun Ramadoss { "ksz8863" },
2034658f2feSArun Ramadoss { "ksz8873" },
2044658f2feSArun Ramadoss { "ksz9477" },
2052eb3ff3cSRomain Naour { "ksz9896" },
2064658f2feSArun Ramadoss { "ksz9897" },
2074658f2feSArun Ramadoss { "ksz9893" },
2084658f2feSArun Ramadoss { "ksz9563" },
2094658f2feSArun Ramadoss { "ksz8563" },
2104658f2feSArun Ramadoss { "ksz9567" },
211c8fac9d0SArun Ramadoss { "lan9370" },
212c8fac9d0SArun Ramadoss { "lan9371" },
213c8fac9d0SArun Ramadoss { "lan9372" },
214c8fac9d0SArun Ramadoss { "lan9373" },
215c8fac9d0SArun Ramadoss { "lan9374" },
2164658f2feSArun Ramadoss { },
2174658f2feSArun Ramadoss };
2184658f2feSArun Ramadoss MODULE_DEVICE_TABLE(spi, ksz_spi_ids);
2194658f2feSArun Ramadoss
2204658f2feSArun Ramadoss static struct spi_driver ksz_spi_driver = {
2214658f2feSArun Ramadoss .driver = {
2224658f2feSArun Ramadoss .name = "ksz-switch",
2234658f2feSArun Ramadoss .owner = THIS_MODULE,
224da53af8cSArun Ramadoss .of_match_table = ksz_dt_ids,
2254658f2feSArun Ramadoss },
2264658f2feSArun Ramadoss .id_table = ksz_spi_ids,
2274658f2feSArun Ramadoss .probe = ksz_spi_probe,
2284658f2feSArun Ramadoss .remove = ksz_spi_remove,
2294658f2feSArun Ramadoss .shutdown = ksz_spi_shutdown,
2304658f2feSArun Ramadoss };
2314658f2feSArun Ramadoss
2324658f2feSArun Ramadoss module_spi_driver(ksz_spi_driver);
2334658f2feSArun Ramadoss
2344658f2feSArun Ramadoss MODULE_ALIAS("spi:ksz9477");
2352eb3ff3cSRomain Naour MODULE_ALIAS("spi:ksz9896");
2364658f2feSArun Ramadoss MODULE_ALIAS("spi:ksz9897");
2374658f2feSArun Ramadoss MODULE_ALIAS("spi:ksz9893");
2384658f2feSArun Ramadoss MODULE_ALIAS("spi:ksz9563");
2394658f2feSArun Ramadoss MODULE_ALIAS("spi:ksz8563");
2404658f2feSArun Ramadoss MODULE_ALIAS("spi:ksz9567");
241c8fac9d0SArun Ramadoss MODULE_ALIAS("spi:lan937x");
2424658f2feSArun Ramadoss MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
2434658f2feSArun Ramadoss MODULE_DESCRIPTION("Microchip ksz Series Switch SPI Driver");
2444658f2feSArun Ramadoss MODULE_LICENSE("GPL");
245