1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Microchip ksz series register access through SPI
5 * Copyright (C) 2017 Microchip Technology Inc.
6 * Tristram Ha <Tristram.Ha@microchip.com>
9 #include <asm/unaligned.h>
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>
17 #include "ksz_common.h"
19 #define KSZ8795_SPI_ADDR_SHIFT 12
20 #define KSZ8795_SPI_ADDR_ALIGN 3
21 #define KSZ8795_SPI_TURNAROUND_SHIFT 1
23 #define KSZ8863_SPI_ADDR_SHIFT 8
24 #define KSZ8863_SPI_ADDR_ALIGN 8
25 #define KSZ8863_SPI_TURNAROUND_SHIFT 0
27 #define KSZ9477_SPI_ADDR_SHIFT 24
28 #define KSZ9477_SPI_ADDR_ALIGN 3
29 #define KSZ9477_SPI_TURNAROUND_SHIFT 5
31 KSZ_REGMAP_TABLE(ksz8795, 16, KSZ8795_SPI_ADDR_SHIFT,
32 KSZ8795_SPI_TURNAROUND_SHIFT, KSZ8795_SPI_ADDR_ALIGN);
34 KSZ_REGMAP_TABLE(ksz8863, 16, KSZ8863_SPI_ADDR_SHIFT,
35 KSZ8863_SPI_TURNAROUND_SHIFT, KSZ8863_SPI_ADDR_ALIGN);
37 KSZ_REGMAP_TABLE(ksz9477, 32, KSZ9477_SPI_ADDR_SHIFT,
38 KSZ9477_SPI_TURNAROUND_SHIFT, KSZ9477_SPI_ADDR_ALIGN);
40 static int ksz_spi_probe(struct spi_device *spi)
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;
49 dev = ksz_switch_alloc(&spi->dev, spi);
53 chip = device_get_match_data(ddev);
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;
64 regmap_config = ksz9477_regmap_config;
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);
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);
80 if (spi->dev.platform_data)
81 dev->pdata = spi->dev.platform_data;
84 spi->mode = SPI_MODE_3;
91 ret = ksz_switch_register(dev);
93 /* Main DSA driver may not be started yet. */
97 spi_set_drvdata(spi, dev);
102 static void ksz_spi_remove(struct spi_device *spi)
104 struct ksz_device *dev = spi_get_drvdata(spi);
107 ksz_switch_remove(dev);
110 static void ksz_spi_shutdown(struct spi_device *spi)
112 struct ksz_device *dev = spi_get_drvdata(spi);
117 ksz_switch_shutdown(dev);
119 spi_set_drvdata(spi, NULL);
122 static const struct of_device_id ksz_dt_ids[] = {
124 .compatible = "microchip,ksz8765",
125 .data = &ksz_switch_chips[KSZ8765]
128 .compatible = "microchip,ksz8794",
129 .data = &ksz_switch_chips[KSZ8794]
132 .compatible = "microchip,ksz8795",
133 .data = &ksz_switch_chips[KSZ8795]
136 .compatible = "microchip,ksz8863",
137 .data = &ksz_switch_chips[KSZ8830]
140 .compatible = "microchip,ksz8873",
141 .data = &ksz_switch_chips[KSZ8830]
144 .compatible = "microchip,ksz9477",
145 .data = &ksz_switch_chips[KSZ9477]
148 .compatible = "microchip,ksz9896",
149 .data = &ksz_switch_chips[KSZ9896]
152 .compatible = "microchip,ksz9897",
153 .data = &ksz_switch_chips[KSZ9897]
156 .compatible = "microchip,ksz9893",
157 .data = &ksz_switch_chips[KSZ9893]
160 .compatible = "microchip,ksz9563",
161 .data = &ksz_switch_chips[KSZ9563]
164 .compatible = "microchip,ksz8563",
165 .data = &ksz_switch_chips[KSZ8563]
168 .compatible = "microchip,ksz9567",
169 .data = &ksz_switch_chips[KSZ9567]
172 .compatible = "microchip,lan9370",
173 .data = &ksz_switch_chips[LAN9370]
176 .compatible = "microchip,lan9371",
177 .data = &ksz_switch_chips[LAN9371]
180 .compatible = "microchip,lan9372",
181 .data = &ksz_switch_chips[LAN9372]
184 .compatible = "microchip,lan9373",
185 .data = &ksz_switch_chips[LAN9373]
188 .compatible = "microchip,lan9374",
189 .data = &ksz_switch_chips[LAN9374]
193 MODULE_DEVICE_TABLE(of, ksz_dt_ids);
195 static const struct spi_device_id ksz_spi_ids[] = {
215 MODULE_DEVICE_TABLE(spi, ksz_spi_ids);
217 static struct spi_driver ksz_spi_driver = {
219 .name = "ksz-switch",
220 .owner = THIS_MODULE,
221 .of_match_table = ksz_dt_ids,
223 .id_table = ksz_spi_ids,
224 .probe = ksz_spi_probe,
225 .remove = ksz_spi_remove,
226 .shutdown = ksz_spi_shutdown,
229 module_spi_driver(ksz_spi_driver);
231 MODULE_ALIAS("spi:ksz9477");
232 MODULE_ALIAS("spi:ksz9896");
233 MODULE_ALIAS("spi:ksz9897");
234 MODULE_ALIAS("spi:ksz9893");
235 MODULE_ALIAS("spi:ksz9563");
236 MODULE_ALIAS("spi:ksz8563");
237 MODULE_ALIAS("spi:ksz9567");
238 MODULE_ALIAS("spi:lan937x");
239 MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
240 MODULE_DESCRIPTION("Microchip ksz Series Switch SPI Driver");
241 MODULE_LICENSE("GPL");