diff options
Diffstat (limited to 'drivers/net/dsa/microchip/ksz_spi.c')
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_spi.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/drivers/net/dsa/microchip/ksz_spi.c b/drivers/net/dsa/microchip/ksz_spi.c new file mode 100644 index 000000000..1b6ab891b --- /dev/null +++ b/drivers/net/dsa/microchip/ksz_spi.c @@ -0,0 +1,246 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Microchip ksz series register access through SPI + * + * Copyright (C) 2017 Microchip Technology Inc. + * Tristram Ha <Tristram.Ha@microchip.com> + */ + +#include <asm/unaligned.h> + +#include <linux/delay.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/spi/spi.h> + +#include "ksz_common.h" + +#define KSZ8795_SPI_ADDR_SHIFT 12 +#define KSZ8795_SPI_ADDR_ALIGN 3 +#define KSZ8795_SPI_TURNAROUND_SHIFT 1 + +#define KSZ8863_SPI_ADDR_SHIFT 8 +#define KSZ8863_SPI_ADDR_ALIGN 8 +#define KSZ8863_SPI_TURNAROUND_SHIFT 0 + +#define KSZ9477_SPI_ADDR_SHIFT 24 +#define KSZ9477_SPI_ADDR_ALIGN 3 +#define KSZ9477_SPI_TURNAROUND_SHIFT 5 + +KSZ_REGMAP_TABLE(ksz8795, 16, KSZ8795_SPI_ADDR_SHIFT, + KSZ8795_SPI_TURNAROUND_SHIFT, KSZ8795_SPI_ADDR_ALIGN); + +KSZ_REGMAP_TABLE(ksz8863, 16, KSZ8863_SPI_ADDR_SHIFT, + KSZ8863_SPI_TURNAROUND_SHIFT, KSZ8863_SPI_ADDR_ALIGN); + +KSZ_REGMAP_TABLE(ksz9477, 32, KSZ9477_SPI_ADDR_SHIFT, + KSZ9477_SPI_TURNAROUND_SHIFT, KSZ9477_SPI_ADDR_ALIGN); + +static int ksz_spi_probe(struct spi_device *spi) +{ + const struct regmap_config *regmap_config; + const struct ksz_chip_data *chip; + struct device *ddev = &spi->dev; + struct regmap_config rc; + struct ksz_device *dev; + int i, ret = 0; + + dev = ksz_switch_alloc(&spi->dev, spi); + if (!dev) + return -ENOMEM; + + chip = device_get_match_data(ddev); + if (!chip) + return -EINVAL; + + if (chip->chip_id == KSZ8830_CHIP_ID) + regmap_config = ksz8863_regmap_config; + else if (chip->chip_id == KSZ8795_CHIP_ID || + chip->chip_id == KSZ8794_CHIP_ID || + chip->chip_id == KSZ8765_CHIP_ID) + regmap_config = ksz8795_regmap_config; + else + regmap_config = ksz9477_regmap_config; + + for (i = 0; i < ARRAY_SIZE(ksz8795_regmap_config); i++) { + rc = regmap_config[i]; + rc.lock_arg = &dev->regmap_mutex; + rc.wr_table = chip->wr_table; + rc.rd_table = chip->rd_table; + dev->regmap[i] = devm_regmap_init_spi(spi, &rc); + + if (IS_ERR(dev->regmap[i])) { + ret = PTR_ERR(dev->regmap[i]); + dev_err(&spi->dev, + "Failed to initialize regmap%i: %d\n", + regmap_config[i].val_bits, ret); + return ret; + } + } + + if (spi->dev.platform_data) + dev->pdata = spi->dev.platform_data; + + /* setup spi */ + spi->mode = SPI_MODE_3; + ret = spi_setup(spi); + if (ret) + return ret; + + dev->irq = spi->irq; + + ret = ksz_switch_register(dev); + + /* Main DSA driver may not be started yet. */ + if (ret) + return ret; + + spi_set_drvdata(spi, dev); + + return 0; +} + +static void ksz_spi_remove(struct spi_device *spi) +{ + struct ksz_device *dev = spi_get_drvdata(spi); + + if (dev) + ksz_switch_remove(dev); +} + +static void ksz_spi_shutdown(struct spi_device *spi) +{ + struct ksz_device *dev = spi_get_drvdata(spi); + + if (!dev) + return; + + if (dev->dev_ops->reset) + dev->dev_ops->reset(dev); + + dsa_switch_shutdown(dev->ds); + + spi_set_drvdata(spi, NULL); +} + +static const struct of_device_id ksz_dt_ids[] = { + { + .compatible = "microchip,ksz8765", + .data = &ksz_switch_chips[KSZ8765] + }, + { + .compatible = "microchip,ksz8794", + .data = &ksz_switch_chips[KSZ8794] + }, + { + .compatible = "microchip,ksz8795", + .data = &ksz_switch_chips[KSZ8795] + }, + { + .compatible = "microchip,ksz8863", + .data = &ksz_switch_chips[KSZ8830] + }, + { + .compatible = "microchip,ksz8873", + .data = &ksz_switch_chips[KSZ8830] + }, + { + .compatible = "microchip,ksz9477", + .data = &ksz_switch_chips[KSZ9477] + }, + { + .compatible = "microchip,ksz9896", + .data = &ksz_switch_chips[KSZ9896] + }, + { + .compatible = "microchip,ksz9897", + .data = &ksz_switch_chips[KSZ9897] + }, + { + .compatible = "microchip,ksz9893", + .data = &ksz_switch_chips[KSZ9893] + }, + { + .compatible = "microchip,ksz9563", + .data = &ksz_switch_chips[KSZ9893] + }, + { + .compatible = "microchip,ksz8563", + .data = &ksz_switch_chips[KSZ8563] + }, + { + .compatible = "microchip,ksz9567", + .data = &ksz_switch_chips[KSZ9567] + }, + { + .compatible = "microchip,lan9370", + .data = &ksz_switch_chips[LAN9370] + }, + { + .compatible = "microchip,lan9371", + .data = &ksz_switch_chips[LAN9371] + }, + { + .compatible = "microchip,lan9372", + .data = &ksz_switch_chips[LAN9372] + }, + { + .compatible = "microchip,lan9373", + .data = &ksz_switch_chips[LAN9373] + }, + { + .compatible = "microchip,lan9374", + .data = &ksz_switch_chips[LAN9374] + }, + {}, +}; +MODULE_DEVICE_TABLE(of, ksz_dt_ids); + +static const struct spi_device_id ksz_spi_ids[] = { + { "ksz8765" }, + { "ksz8794" }, + { "ksz8795" }, + { "ksz8863" }, + { "ksz8873" }, + { "ksz9477" }, + { "ksz9896" }, + { "ksz9897" }, + { "ksz9893" }, + { "ksz9563" }, + { "ksz8563" }, + { "ksz9567" }, + { "lan9370" }, + { "lan9371" }, + { "lan9372" }, + { "lan9373" }, + { "lan9374" }, + { }, +}; +MODULE_DEVICE_TABLE(spi, ksz_spi_ids); + +static struct spi_driver ksz_spi_driver = { + .driver = { + .name = "ksz-switch", + .owner = THIS_MODULE, + .of_match_table = ksz_dt_ids, + }, + .id_table = ksz_spi_ids, + .probe = ksz_spi_probe, + .remove = ksz_spi_remove, + .shutdown = ksz_spi_shutdown, +}; + +module_spi_driver(ksz_spi_driver); + +MODULE_ALIAS("spi:ksz9477"); +MODULE_ALIAS("spi:ksz9896"); +MODULE_ALIAS("spi:ksz9897"); +MODULE_ALIAS("spi:ksz9893"); +MODULE_ALIAS("spi:ksz9563"); +MODULE_ALIAS("spi:ksz8563"); +MODULE_ALIAS("spi:ksz9567"); +MODULE_ALIAS("spi:lan937x"); +MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>"); +MODULE_DESCRIPTION("Microchip ksz Series Switch SPI Driver"); +MODULE_LICENSE("GPL"); |