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(base: &spi->dev, priv: spi);
50 if (!dev)
51 return -ENOMEM;
52
53 chip = device_get_match_data(dev: 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(ptr: dev->regmap[i])) {
74 return dev_err_probe(dev: &spi->dev, err: PTR_ERR(ptr: dev->regmap[i]),
75 fmt: "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, data: 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

source code of linux/drivers/net/dsa/microchip/ksz_spi.c