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,ksz8567",
169		.data = &ksz_switch_chips[KSZ8567]
170	},
171	{
172		.compatible = "microchip,ksz9567",
173		.data = &ksz_switch_chips[KSZ9567]
174	},
175	{
176		.compatible = "microchip,lan9370",
177		.data = &ksz_switch_chips[LAN9370]
178	},
179	{
180		.compatible = "microchip,lan9371",
181		.data = &ksz_switch_chips[LAN9371]
182	},
183	{
184		.compatible = "microchip,lan9372",
185		.data = &ksz_switch_chips[LAN9372]
186	},
187	{
188		.compatible = "microchip,lan9373",
189		.data = &ksz_switch_chips[LAN9373]
190	},
191	{
192		.compatible = "microchip,lan9374",
193		.data = &ksz_switch_chips[LAN9374]
194	},
195	{},
196};
197MODULE_DEVICE_TABLE(of, ksz_dt_ids);
198
199static const struct spi_device_id ksz_spi_ids[] = {
200	{ "ksz8765" },
201	{ "ksz8794" },
202	{ "ksz8795" },
203	{ "ksz8863" },
204	{ "ksz8873" },
205	{ "ksz9477" },
206	{ "ksz9896" },
207	{ "ksz9897" },
208	{ "ksz9893" },
209	{ "ksz9563" },
210	{ "ksz8563" },
211	{ "ksz8567" },
212	{ "ksz9567" },
213	{ "lan9370" },
214	{ "lan9371" },
215	{ "lan9372" },
216	{ "lan9373" },
217	{ "lan9374" },
218	{ },
219};
220MODULE_DEVICE_TABLE(spi, ksz_spi_ids);
221
222static struct spi_driver ksz_spi_driver = {
223	.driver = {
224		.name	= "ksz-switch",
225		.owner	= THIS_MODULE,
226		.of_match_table = ksz_dt_ids,
227	},
228	.id_table = ksz_spi_ids,
229	.probe	= ksz_spi_probe,
230	.remove	= ksz_spi_remove,
231	.shutdown = ksz_spi_shutdown,
232};
233
234module_spi_driver(ksz_spi_driver);
235
236MODULE_ALIAS("spi:ksz9477");
237MODULE_ALIAS("spi:ksz9896");
238MODULE_ALIAS("spi:ksz9897");
239MODULE_ALIAS("spi:ksz9893");
240MODULE_ALIAS("spi:ksz9563");
241MODULE_ALIAS("spi:ksz8563");
242MODULE_ALIAS("spi:ksz9567");
243MODULE_ALIAS("spi:lan937x");
244MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
245MODULE_DESCRIPTION("Microchip ksz Series Switch SPI Driver");
246MODULE_LICENSE("GPL");
247