1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Microchip ksz series register access through SPI
  4 *
  5 * Copyright (C) 2017 Microchip Technology Inc.
  6 *	Tristram Ha <Tristram.Ha@microchip.com>
  7 */
  8
  9#include <asm/unaligned.h>
 10
 11#include <linux/delay.h>
 12#include <linux/kernel.h>
 13#include <linux/module.h>
 14#include <linux/regmap.h>
 15#include <linux/spi/spi.h>
 16
 17#include "ksz_common.h"
 18
 19#define KSZ8795_SPI_ADDR_SHIFT			12
 20#define KSZ8795_SPI_ADDR_ALIGN			3
 21#define KSZ8795_SPI_TURNAROUND_SHIFT		1
 22
 23#define KSZ8863_SPI_ADDR_SHIFT			8
 24#define KSZ8863_SPI_ADDR_ALIGN			8
 25#define KSZ8863_SPI_TURNAROUND_SHIFT		0
 26
 27#define KSZ9477_SPI_ADDR_SHIFT			24
 28#define KSZ9477_SPI_ADDR_ALIGN			3
 29#define KSZ9477_SPI_TURNAROUND_SHIFT		5
 30
 31KSZ_REGMAP_TABLE(ksz8795, 16, KSZ8795_SPI_ADDR_SHIFT,
 32		 KSZ8795_SPI_TURNAROUND_SHIFT, KSZ8795_SPI_ADDR_ALIGN);
 33
 34KSZ_REGMAP_TABLE(ksz8863, 16, KSZ8863_SPI_ADDR_SHIFT,
 35		 KSZ8863_SPI_TURNAROUND_SHIFT, KSZ8863_SPI_ADDR_ALIGN);
 36
 37KSZ_REGMAP_TABLE(ksz9477, 32, KSZ9477_SPI_ADDR_SHIFT,
 38		 KSZ9477_SPI_TURNAROUND_SHIFT, KSZ9477_SPI_ADDR_ALIGN);
 39
 40static int ksz_spi_probe(struct spi_device *spi)
 41{
 42	const struct regmap_config *regmap_config;
 43	const struct ksz_chip_data *chip;
 44	struct device *ddev = &spi->dev;
 45	struct regmap_config rc;
 46	struct ksz_device *dev;
 47	int i, ret = 0;
 48
 49	dev = ksz_switch_alloc(&spi->dev, spi);
 50	if (!dev)
 51		return -ENOMEM;
 52
 53	chip = device_get_match_data(ddev);
 54	if (!chip)
 55		return -EINVAL;
 56
 57	if (chip->chip_id == KSZ8830_CHIP_ID)
 58		regmap_config = ksz8863_regmap_config;
 59	else if (chip->chip_id == KSZ8795_CHIP_ID ||
 60		 chip->chip_id == KSZ8794_CHIP_ID ||
 61		 chip->chip_id == KSZ8765_CHIP_ID)
 62		regmap_config = ksz8795_regmap_config;
 63	else
 64		regmap_config = ksz9477_regmap_config;
 65
 66	for (i = 0; i < __KSZ_NUM_REGMAPS; i++) {
 67		rc = regmap_config[i];
 68		rc.lock_arg = &dev->regmap_mutex;
 69		rc.wr_table = chip->wr_table;
 70		rc.rd_table = chip->rd_table;
 71		dev->regmap[i] = devm_regmap_init_spi(spi, &rc);
 72
 73		if (IS_ERR(dev->regmap[i])) {
 74			return dev_err_probe(&spi->dev, PTR_ERR(dev->regmap[i]),
 75					     "Failed to initialize regmap%i\n",
 76					     regmap_config[i].val_bits);
 77		}
 78	}
 79
 80	if (spi->dev.platform_data)
 81		dev->pdata = spi->dev.platform_data;
 82
 83	/* setup spi */
 84	spi->mode = SPI_MODE_3;
 85	ret = spi_setup(spi);
 86	if (ret)
 87		return ret;
 88
 89	dev->irq = spi->irq;
 90
 91	ret = ksz_switch_register(dev);
 92
 93	/* Main DSA driver may not be started yet. */
 94	if (ret)
 95		return ret;
 96
 97	spi_set_drvdata(spi, dev);
 98
 99	return 0;
100}
101
102static void ksz_spi_remove(struct spi_device *spi)
103{
104	struct ksz_device *dev = spi_get_drvdata(spi);
105
106	if (dev)
107		ksz_switch_remove(dev);
108}
109
110static void ksz_spi_shutdown(struct spi_device *spi)
111{
112	struct ksz_device *dev = spi_get_drvdata(spi);
113
114	if (!dev)
115		return;
116
117	ksz_switch_shutdown(dev);
118
119	spi_set_drvdata(spi, NULL);
120}
121
122static const struct of_device_id ksz_dt_ids[] = {
123	{
124		.compatible = "microchip,ksz8765",
125		.data = &ksz_switch_chips[KSZ8765]
126	},
127	{
128		.compatible = "microchip,ksz8794",
129		.data = &ksz_switch_chips[KSZ8794]
130	},
131	{
132		.compatible = "microchip,ksz8795",
133		.data = &ksz_switch_chips[KSZ8795]
134	},
135	{
136		.compatible = "microchip,ksz8863",
137		.data = &ksz_switch_chips[KSZ8830]
138	},
139	{
140		.compatible = "microchip,ksz8873",
141		.data = &ksz_switch_chips[KSZ8830]
142	},
143	{
144		.compatible = "microchip,ksz9477",
145		.data = &ksz_switch_chips[KSZ9477]
146	},
147	{
148		.compatible = "microchip,ksz9896",
149		.data = &ksz_switch_chips[KSZ9896]
150	},
151	{
152		.compatible = "microchip,ksz9897",
153		.data = &ksz_switch_chips[KSZ9897]
154	},
155	{
156		.compatible = "microchip,ksz9893",
157		.data = &ksz_switch_chips[KSZ9893]
158	},
159	{
160		.compatible = "microchip,ksz9563",
161		.data = &ksz_switch_chips[KSZ9563]
162	},
163	{
164		.compatible = "microchip,ksz8563",
165		.data = &ksz_switch_chips[KSZ8563]
166	},
167	{
168		.compatible = "microchip,ksz9567",
169		.data = &ksz_switch_chips[KSZ9567]
170	},
171	{
172		.compatible = "microchip,lan9370",
173		.data = &ksz_switch_chips[LAN9370]
174	},
175	{
176		.compatible = "microchip,lan9371",
177		.data = &ksz_switch_chips[LAN9371]
178	},
179	{
180		.compatible = "microchip,lan9372",
181		.data = &ksz_switch_chips[LAN9372]
182	},
183	{
184		.compatible = "microchip,lan9373",
185		.data = &ksz_switch_chips[LAN9373]
186	},
187	{
188		.compatible = "microchip,lan9374",
189		.data = &ksz_switch_chips[LAN9374]
190	},
191	{},
192};
193MODULE_DEVICE_TABLE(of, ksz_dt_ids);
194
195static const struct spi_device_id ksz_spi_ids[] = {
196	{ "ksz8765" },
197	{ "ksz8794" },
198	{ "ksz8795" },
199	{ "ksz8863" },
200	{ "ksz8873" },
201	{ "ksz9477" },
202	{ "ksz9896" },
203	{ "ksz9897" },
204	{ "ksz9893" },
205	{ "ksz9563" },
206	{ "ksz8563" },
207	{ "ksz9567" },
208	{ "lan9370" },
209	{ "lan9371" },
210	{ "lan9372" },
211	{ "lan9373" },
212	{ "lan9374" },
213	{ },
214};
215MODULE_DEVICE_TABLE(spi, ksz_spi_ids);
216
217static struct spi_driver ksz_spi_driver = {
218	.driver = {
219		.name	= "ksz-switch",
220		.owner	= THIS_MODULE,
221		.of_match_table = ksz_dt_ids,
222	},
223	.id_table = ksz_spi_ids,
224	.probe	= ksz_spi_probe,
225	.remove	= ksz_spi_remove,
226	.shutdown = ksz_spi_shutdown,
227};
228
229module_spi_driver(ksz_spi_driver);
230
231MODULE_ALIAS("spi:ksz9477");
232MODULE_ALIAS("spi:ksz9896");
233MODULE_ALIAS("spi:ksz9897");
234MODULE_ALIAS("spi:ksz9893");
235MODULE_ALIAS("spi:ksz9563");
236MODULE_ALIAS("spi:ksz8563");
237MODULE_ALIAS("spi:ksz9567");
238MODULE_ALIAS("spi:lan937x");
239MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
240MODULE_DESCRIPTION("Microchip ksz Series Switch SPI Driver");
241MODULE_LICENSE("GPL");