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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Microchip ksz series register access through SPI
4 *
5 * Copyright (C) 2017-2024 Microchip Technology Inc.
6 * Tristram Ha <Tristram.Ha@microchip.com>
7 */
8
9#include <linux/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 /* Save chip id to do special initialization when probing. */
58 dev->chip_id = chip->chip_id;
59 if (chip->chip_id == KSZ88X3_CHIP_ID)
60 regmap_config = ksz8863_regmap_config;
61 else if (chip->chip_id == KSZ8795_CHIP_ID ||
62 chip->chip_id == KSZ8794_CHIP_ID ||
63 chip->chip_id == KSZ8765_CHIP_ID)
64 regmap_config = ksz8795_regmap_config;
65 else if (chip->chip_id == KSZ8895_CHIP_ID ||
66 chip->chip_id == KSZ8864_CHIP_ID)
67 regmap_config = ksz8863_regmap_config;
68 else
69 regmap_config = ksz9477_regmap_config;
70
71 for (i = 0; i < __KSZ_NUM_REGMAPS; i++) {
72 rc = regmap_config[i];
73 rc.lock_arg = &dev->regmap_mutex;
74 rc.wr_table = chip->wr_table;
75 rc.rd_table = chip->rd_table;
76 dev->regmap[i] = devm_regmap_init_spi(spi, &rc);
77
78 if (IS_ERR(dev->regmap[i])) {
79 return dev_err_probe(&spi->dev, PTR_ERR(dev->regmap[i]),
80 "Failed to initialize regmap%i\n",
81 regmap_config[i].val_bits);
82 }
83 }
84
85 if (spi->dev.platform_data)
86 dev->pdata = spi->dev.platform_data;
87
88 /* setup spi */
89 spi->mode = SPI_MODE_3;
90 ret = spi_setup(spi);
91 if (ret)
92 return ret;
93
94 dev->irq = spi->irq;
95
96 ret = ksz_switch_register(dev);
97
98 /* Main DSA driver may not be started yet. */
99 if (ret)
100 return ret;
101
102 spi_set_drvdata(spi, dev);
103
104 return 0;
105}
106
107static void ksz_spi_remove(struct spi_device *spi)
108{
109 struct ksz_device *dev = spi_get_drvdata(spi);
110
111 if (dev)
112 ksz_switch_remove(dev);
113}
114
115static void ksz_spi_shutdown(struct spi_device *spi)
116{
117 struct ksz_device *dev = spi_get_drvdata(spi);
118
119 if (!dev)
120 return;
121
122 ksz_switch_shutdown(dev);
123
124 spi_set_drvdata(spi, NULL);
125}
126
127static const struct of_device_id ksz_dt_ids[] = {
128 {
129 .compatible = "microchip,ksz8765",
130 .data = &ksz_switch_chips[KSZ8765]
131 },
132 {
133 .compatible = "microchip,ksz8794",
134 .data = &ksz_switch_chips[KSZ8794]
135 },
136 {
137 .compatible = "microchip,ksz8795",
138 .data = &ksz_switch_chips[KSZ8795]
139 },
140 {
141 .compatible = "microchip,ksz8863",
142 .data = &ksz_switch_chips[KSZ88X3]
143 },
144 {
145 .compatible = "microchip,ksz8864",
146 .data = &ksz_switch_chips[KSZ8864]
147 },
148 {
149 .compatible = "microchip,ksz8873",
150 .data = &ksz_switch_chips[KSZ88X3]
151 },
152 {
153 .compatible = "microchip,ksz8895",
154 .data = &ksz_switch_chips[KSZ8895]
155 },
156 {
157 .compatible = "microchip,ksz9477",
158 .data = &ksz_switch_chips[KSZ9477]
159 },
160 {
161 .compatible = "microchip,ksz9896",
162 .data = &ksz_switch_chips[KSZ9896]
163 },
164 {
165 .compatible = "microchip,ksz9897",
166 .data = &ksz_switch_chips[KSZ9897]
167 },
168 {
169 .compatible = "microchip,ksz9893",
170 .data = &ksz_switch_chips[KSZ9893]
171 },
172 {
173 .compatible = "microchip,ksz9563",
174 .data = &ksz_switch_chips[KSZ9563]
175 },
176 {
177 .compatible = "microchip,ksz8563",
178 .data = &ksz_switch_chips[KSZ8563]
179 },
180 {
181 .compatible = "microchip,ksz8567",
182 .data = &ksz_switch_chips[KSZ8567]
183 },
184 {
185 .compatible = "microchip,ksz9567",
186 .data = &ksz_switch_chips[KSZ9567]
187 },
188 {
189 .compatible = "microchip,lan9370",
190 .data = &ksz_switch_chips[LAN9370]
191 },
192 {
193 .compatible = "microchip,lan9371",
194 .data = &ksz_switch_chips[LAN9371]
195 },
196 {
197 .compatible = "microchip,lan9372",
198 .data = &ksz_switch_chips[LAN9372]
199 },
200 {
201 .compatible = "microchip,lan9373",
202 .data = &ksz_switch_chips[LAN9373]
203 },
204 {
205 .compatible = "microchip,lan9374",
206 .data = &ksz_switch_chips[LAN9374]
207 },
208 {
209 .compatible = "microchip,lan9646",
210 .data = &ksz_switch_chips[LAN9646]
211 },
212 {},
213};
214MODULE_DEVICE_TABLE(of, ksz_dt_ids);
215
216static const struct spi_device_id ksz_spi_ids[] = {
217 { "ksz8765" },
218 { "ksz8794" },
219 { "ksz8795" },
220 { "ksz8863" },
221 { "ksz8864" },
222 { "ksz8873" },
223 { "ksz8895" },
224 { "ksz9477" },
225 { "ksz9896" },
226 { "ksz9897" },
227 { "ksz9893" },
228 { "ksz9563" },
229 { "ksz8563" },
230 { "ksz8567" },
231 { "ksz9567" },
232 { "lan9370" },
233 { "lan9371" },
234 { "lan9372" },
235 { "lan9373" },
236 { "lan9374" },
237 { "lan9646" },
238 { },
239};
240MODULE_DEVICE_TABLE(spi, ksz_spi_ids);
241
242static struct spi_driver ksz_spi_driver = {
243 .driver = {
244 .name = "ksz-switch",
245 .of_match_table = ksz_dt_ids,
246 },
247 .id_table = ksz_spi_ids,
248 .probe = ksz_spi_probe,
249 .remove = ksz_spi_remove,
250 .shutdown = ksz_spi_shutdown,
251};
252
253module_spi_driver(ksz_spi_driver);
254
255MODULE_ALIAS("spi:lan937x");
256MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
257MODULE_DESCRIPTION("Microchip ksz Series Switch SPI Driver");
258MODULE_LICENSE("GPL");
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");