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 < ARRAY_SIZE(ksz8795_regmap_config); 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	if (dev->dev_ops->reset)
118		dev->dev_ops->reset(dev);
119
120	dsa_switch_shutdown(dev->ds);
121
122	spi_set_drvdata(spi, NULL);
123}
124
125static const struct of_device_id ksz_dt_ids[] = {
126	{
127		.compatible = "microchip,ksz8765",
128		.data = &ksz_switch_chips[KSZ8765]
129	},
130	{
131		.compatible = "microchip,ksz8794",
132		.data = &ksz_switch_chips[KSZ8794]
133	},
134	{
135		.compatible = "microchip,ksz8795",
136		.data = &ksz_switch_chips[KSZ8795]
137	},
138	{
139		.compatible = "microchip,ksz8863",
140		.data = &ksz_switch_chips[KSZ8830]
141	},
142	{
143		.compatible = "microchip,ksz8873",
144		.data = &ksz_switch_chips[KSZ8830]
145	},
146	{
147		.compatible = "microchip,ksz9477",
148		.data = &ksz_switch_chips[KSZ9477]
149	},
150	{
151		.compatible = "microchip,ksz9896",
152		.data = &ksz_switch_chips[KSZ9896]
153	},
154	{
155		.compatible = "microchip,ksz9897",
156		.data = &ksz_switch_chips[KSZ9897]
157	},
158	{
159		.compatible = "microchip,ksz9893",
160		.data = &ksz_switch_chips[KSZ9893]
161	},
162	{
163		.compatible = "microchip,ksz9563",
164		.data = &ksz_switch_chips[KSZ9563]
165	},
166	{
167		.compatible = "microchip,ksz8563",
168		.data = &ksz_switch_chips[KSZ8563]
169	},
170	{
171		.compatible = "microchip,ksz9567",
172		.data = &ksz_switch_chips[KSZ9567]
173	},
174	{
175		.compatible = "microchip,lan9370",
176		.data = &ksz_switch_chips[LAN9370]
177	},
178	{
179		.compatible = "microchip,lan9371",
180		.data = &ksz_switch_chips[LAN9371]
181	},
182	{
183		.compatible = "microchip,lan9372",
184		.data = &ksz_switch_chips[LAN9372]
185	},
186	{
187		.compatible = "microchip,lan9373",
188		.data = &ksz_switch_chips[LAN9373]
189	},
190	{
191		.compatible = "microchip,lan9374",
192		.data = &ksz_switch_chips[LAN9374]
193	},
194	{},
195};
196MODULE_DEVICE_TABLE(of, ksz_dt_ids);
197
198static const struct spi_device_id ksz_spi_ids[] = {
199	{ "ksz8765" },
200	{ "ksz8794" },
201	{ "ksz8795" },
202	{ "ksz8863" },
203	{ "ksz8873" },
204	{ "ksz9477" },
205	{ "ksz9896" },
206	{ "ksz9897" },
207	{ "ksz9893" },
208	{ "ksz9563" },
209	{ "ksz8563" },
210	{ "ksz9567" },
211	{ "lan9370" },
212	{ "lan9371" },
213	{ "lan9372" },
214	{ "lan9373" },
215	{ "lan9374" },
216	{ },
217};
218MODULE_DEVICE_TABLE(spi, ksz_spi_ids);
219
220static struct spi_driver ksz_spi_driver = {
221	.driver = {
222		.name	= "ksz-switch",
223		.owner	= THIS_MODULE,
224		.of_match_table = ksz_dt_ids,
225	},
226	.id_table = ksz_spi_ids,
227	.probe	= ksz_spi_probe,
228	.remove	= ksz_spi_remove,
229	.shutdown = ksz_spi_shutdown,
230};
231
232module_spi_driver(ksz_spi_driver);
233
234MODULE_ALIAS("spi:ksz9477");
235MODULE_ALIAS("spi:ksz9896");
236MODULE_ALIAS("spi:ksz9897");
237MODULE_ALIAS("spi:ksz9893");
238MODULE_ALIAS("spi:ksz9563");
239MODULE_ALIAS("spi:ksz8563");
240MODULE_ALIAS("spi:ksz9567");
241MODULE_ALIAS("spi:lan937x");
242MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
243MODULE_DESCRIPTION("Microchip ksz Series Switch SPI Driver");
244MODULE_LICENSE("GPL");