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 31 KSZ_REGMAP_TABLE(ksz8795, 16, KSZ8795_SPI_ADDR_SHIFT, 32 KSZ8795_SPI_TURNAROUND_SHIFT, KSZ8795_SPI_ADDR_ALIGN); 33 34 KSZ_REGMAP_TABLE(ksz8863, 16, KSZ8863_SPI_ADDR_SHIFT, 35 KSZ8863_SPI_TURNAROUND_SHIFT, KSZ8863_SPI_ADDR_ALIGN); 36 37 KSZ_REGMAP_TABLE(ksz9477, 32, KSZ9477_SPI_ADDR_SHIFT, 38 KSZ9477_SPI_TURNAROUND_SHIFT, KSZ9477_SPI_ADDR_ALIGN); 39 40 static 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 } 101 102 static 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 } 109 110 static 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 } 124 125 static 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 }; 196 MODULE_DEVICE_TABLE(of, ksz_dt_ids); 197 198 static 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 }; 218 MODULE_DEVICE_TABLE(spi, ksz_spi_ids); 219 220 static 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 }; 231 232 module_spi_driver(ksz_spi_driver); 233 234 MODULE_ALIAS("spi:ksz9477"); 235 MODULE_ALIAS("spi:ksz9896"); 236 MODULE_ALIAS("spi:ksz9897"); 237 MODULE_ALIAS("spi:ksz9893"); 238 MODULE_ALIAS("spi:ksz9563"); 239 MODULE_ALIAS("spi:ksz8563"); 240 MODULE_ALIAS("spi:ksz9567"); 241 MODULE_ALIAS("spi:lan937x"); 242 MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>"); 243 MODULE_DESCRIPTION("Microchip ksz Series Switch SPI Driver"); 244 MODULE_LICENSE("GPL"); 245