diff options
| -rw-r--r-- | target/linux/ath79/files/drivers/gpio/gpio-rb4xx.c | 172 | ||||
| -rw-r--r-- | target/linux/ath79/files/drivers/mfd/rb4xx-cpld.c | 182 | ||||
| -rw-r--r-- | target/linux/ath79/files/drivers/mtd/nand/raw/nand_rb4xx.c | 297 | ||||
| -rw-r--r-- | target/linux/ath79/files/include/mfd/rb4xx-cpld.h | 25 | ||||
| -rw-r--r-- | target/linux/ath79/patches-4.19/920-mikrotik-rb4xx.patch | 69 | ||||
| -rw-r--r-- | target/linux/ath79/patches-5.4/920-mikrotik-rb4xx.patch | 72 |
6 files changed, 817 insertions, 0 deletions
diff --git a/target/linux/ath79/files/drivers/gpio/gpio-rb4xx.c b/target/linux/ath79/files/drivers/gpio/gpio-rb4xx.c new file mode 100644 index 0000000000..f8022436e0 --- /dev/null +++ b/target/linux/ath79/files/drivers/gpio/gpio-rb4xx.c @@ -0,0 +1,172 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * GPIO driver for the MikroTik RouterBoard 4xx series + * + * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2015 Bert Vermeulen <bert@biot.com> + * Copyright (C) 2020 Christopher Hill <ch6574@gmail.com> + * + * This file was based on the driver for Linux 2.6.22 published by + * MikroTik for their RouterBoard 4xx series devices. + * + * N.B. driver probe reports "DMA mask not set" warnings which are + * an artifact of using a platform_driver as an MFD device child. + * See conversation here https://lkml.org/lkml/2020/4/28/675 + */ +#include <linux/platform_device.h> +#include <linux/gpio/driver.h> +#include <linux/module.h> +#include <linux/of_device.h> + +#include <mfd/rb4xx-cpld.h> + +struct rb4xx_gpio { + struct rb4xx_cpld *cpld; + struct device *dev; + + struct gpio_chip chip; + struct mutex lock; + u16 values; /* bitfield of GPIO 0-8 current values */ +}; + +static int rb4xx_gpio_cpld_set(struct rb4xx_gpio *gpio, unsigned int offset, + int value) +{ + struct rb4xx_cpld *cpld = gpio->cpld; + u16 values; + int ret; + + mutex_lock(&gpio->lock); + values = gpio->values; + + if (value) + values |= BIT(offset); + else + values &= ~(BIT(offset)); + + if (values == gpio->values) { + ret = 0; + goto unlock; + } + + if (offset < 8) { + ret = cpld->gpio_set_0_7(cpld, values & 0xff); + } else if (offset == 8) { + ret = cpld->gpio_set_8(cpld, values >> 8); + } + + if(likely(!ret)) + gpio->values = values; + +unlock: + mutex_unlock(&gpio->lock); + return ret; +} + +static int rb4xx_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) +{ + return 0; /* All 9 GPIOs are out */ +} + +static int rb4xx_gpio_direction_input(struct gpio_chip *chip, + unsigned int offset) +{ + return -EOPNOTSUPP; +} + +static int rb4xx_gpio_direction_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + return rb4xx_gpio_cpld_set(gpiochip_get_data(chip), offset, value); +} + +static int rb4xx_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct rb4xx_gpio *gpio = gpiochip_get_data(chip); + int ret; + + mutex_lock(&gpio->lock); + ret = (gpio->values >> offset) & 0x1; + mutex_unlock(&gpio->lock); + + return ret; +} + +static void rb4xx_gpio_set(struct gpio_chip *chip, unsigned int offset, + int value) +{ + rb4xx_gpio_cpld_set(gpiochip_get_data(chip), offset, value); +} + +static int rb4xx_gpio_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device *parent = dev->parent; + struct rb4xx_gpio *gpio; + u32 val; + + if (!parent) + return -ENODEV; + + gpio = devm_kzalloc(dev, sizeof(*gpio), GFP_KERNEL); + if (!gpio) + return -ENOMEM; + + platform_set_drvdata(pdev, gpio); + gpio->cpld = dev_get_drvdata(parent); + gpio->dev = dev; + gpio->values = 0; + mutex_init(&gpio->lock); + + gpio->chip.label = "rb4xx-gpio"; + gpio->chip.parent = dev; + gpio->chip.owner = THIS_MODULE; + gpio->chip.get_direction = rb4xx_gpio_get_direction; + gpio->chip.direction_input = rb4xx_gpio_direction_input; + gpio->chip.direction_output = rb4xx_gpio_direction_output; + gpio->chip.get = rb4xx_gpio_get; + gpio->chip.set = rb4xx_gpio_set; + gpio->chip.ngpio = 9; + gpio->chip.base = -1; + gpio->chip.can_sleep = 1; + + if (!of_property_read_u32(dev->of_node, "base", &val)) + gpio->chip.base = val; + + return gpiochip_add_data(&gpio->chip, gpio); +} + +static int rb4xx_gpio_remove(struct platform_device *pdev) +{ + struct rb4xx_gpio *gpio = platform_get_drvdata(pdev); + + gpiochip_remove(&gpio->chip); + mutex_destroy(&gpio->lock); + + return 0; +} + +static const struct platform_device_id rb4xx_gpio_id_table[] = { + { "mikrotik,rb4xx-gpio", }, + { }, +}; +MODULE_DEVICE_TABLE(platform, rb4xx_gpio_id_table); + +static struct platform_driver rb4xx_gpio_driver = { + .probe = rb4xx_gpio_probe, + .remove = rb4xx_gpio_remove, + .id_table = rb4xx_gpio_id_table, + .driver = { + .name = "rb4xx-gpio", + }, +}; + +module_platform_driver(rb4xx_gpio_driver); + +MODULE_DESCRIPTION("Mikrotik RB4xx GPIO driver"); +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); +MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>"); +MODULE_AUTHOR("Bert Vermeulen <bert@biot.com>"); +MODULE_AUTHOR("Christopher Hill <ch6574@gmail.com"); +MODULE_LICENSE("GPL v2"); diff --git a/target/linux/ath79/files/drivers/mfd/rb4xx-cpld.c b/target/linux/ath79/files/drivers/mfd/rb4xx-cpld.c new file mode 100644 index 0000000000..da18424c63 --- /dev/null +++ b/target/linux/ath79/files/drivers/mfd/rb4xx-cpld.c @@ -0,0 +1,182 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * CPLD driver for the MikroTik RouterBoard 4xx series + * + * This driver provides access to a CPLD that interfaces between the SoC SPI bus + * and other devices. Behind the CPLD there is a NAND flash chip and five LEDs. + * + * The CPLD supports SPI two-wire mode, in which two bits are transferred per + * SPI clock cycle. The second bit is transmitted with the SoC's CS2 pin. + * + * The CPLD also acts as a GPIO expander. + * + * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2015 Bert Vermeulen <bert@biot.com> + * Copyright (C) 2020 Christopher Hill <ch6574@gmail.com> + * + * This file was based on the driver for Linux 2.6.22 published by + * MikroTik for their RouterBoard 4xx series devices. +*/ +#include <linux/mfd/core.h> +#include <linux/spi/spi.h> +#include <linux/module.h> +#include <linux/of_platform.h> + +#include <mfd/rb4xx-cpld.h> + +/* CPLD commands */ +#define CPLD_CMD_WRITE_NAND 0x08 /* send cmd, n x send data, send idle */ +#define CPLD_CMD_WRITE_CFG 0x09 /* send cmd, n x send cfg */ +#define CPLD_CMD_READ_NAND 0x0a /* send cmd, send idle, n x read data */ +#define CPLD_CMD_READ_FAST 0x0b /* send cmd, 4 x idle, n x read data */ +#define CPLD_CMD_GPIO8_HIGH 0x0c /* send cmd */ +#define CPLD_CMD_GPIO8_LOW 0x0d /* send cmd */ + +static int rb4xx_cpld_write_nand(struct rb4xx_cpld *cpld, const void *tx_buf, + unsigned int len) +{ + struct spi_message m; + static const u8 cmd = CPLD_CMD_WRITE_NAND; + struct spi_transfer t[3] = { + { + .tx_buf = &cmd, + .len = sizeof(cmd), + }, { + .tx_buf = tx_buf, + .len = len, + .tx_nbits = SPI_NBITS_DUAL, + }, { + .len = 1, + .tx_nbits = SPI_NBITS_DUAL, + }, + }; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + spi_message_add_tail(&t[2], &m); + return spi_sync(cpld->spi, &m); +} + +static int rb4xx_cpld_read_nand(struct rb4xx_cpld *cpld, void *rx_buf, + unsigned int len) +{ + struct spi_message m; + static const u8 cmd[2] = { + CPLD_CMD_READ_NAND, 0 + }; + struct spi_transfer t[2] = { + { + .tx_buf = &cmd, + .len = sizeof(cmd), + }, { + .rx_buf = rx_buf, + .len = len, + }, + }; + + spi_message_init(&m); + spi_message_add_tail(&t[0], &m); + spi_message_add_tail(&t[1], &m); + return spi_sync(cpld->spi, &m); +} + +static int rb4xx_cpld_cmd(struct rb4xx_cpld *cpld, const void *tx_buf, + unsigned int len) +{ + struct spi_message m; + struct spi_transfer t = { + .tx_buf = tx_buf, + .len = len, + }; + + spi_message_init(&m); + spi_message_add_tail(&t, &m); + return spi_sync(cpld->spi, &m); +} + +static int rb4xx_cpld_gpio_set_0_7(struct rb4xx_cpld *cpld, u8 values) +{ + /* GPIO 0-7 change can be sent via command + bitfield */ + u8 cmd[2] = { + CPLD_CMD_WRITE_CFG, values + }; + return rb4xx_cpld_cmd(cpld, &cmd, 2); +} + +static int rb4xx_cpld_gpio_set_8(struct rb4xx_cpld *cpld, u8 value) +{ + /* GPIO 8 uses dedicated high/low commands */ + u8 cmd = CPLD_CMD_GPIO8_HIGH | !!(value); + return rb4xx_cpld_cmd(cpld, &cmd, 1); +} + +static const struct mfd_cell rb4xx_cpld_cells[] = { + { + .name = "mikrotik,rb4xx-gpio", + .of_compatible = "mikrotik,rb4xx-gpio", + }, { + .name = "mikrotik,rb4xx-nand", + .of_compatible = "mikrotik,rb4xx-nand", + }, +}; + +static int rb4xx_cpld_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct rb4xx_cpld *cpld; + int ret; + + cpld = devm_kzalloc(dev, sizeof(*cpld), GFP_KERNEL); + if (!cpld) + return -ENOMEM; + + dev_set_drvdata(dev, cpld); + + cpld->spi = spi; + cpld->write_nand = rb4xx_cpld_write_nand; + cpld->read_nand = rb4xx_cpld_read_nand; + cpld->gpio_set_0_7 = rb4xx_cpld_gpio_set_0_7; + cpld->gpio_set_8 = rb4xx_cpld_gpio_set_8; + + spi->mode = SPI_MODE_0 | SPI_TX_DUAL; + ret = spi_setup(spi); + if (ret) + return ret; + + return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, + rb4xx_cpld_cells, + ARRAY_SIZE(rb4xx_cpld_cells), + NULL, 0, NULL); +} + +static int rb4xx_cpld_remove(struct spi_device *spi) +{ + return 0; +} + +static const struct of_device_id rb4xx_cpld_dt_match[] = { + { .compatible = "mikrotik,rb4xx-cpld", }, + { }, +}; +MODULE_DEVICE_TABLE(of, rb4xx_cpld_dt_match); + +static struct spi_driver rb4xx_cpld_driver = { + .probe = rb4xx_cpld_probe, + .remove = rb4xx_cpld_remove, + .driver = { + .name = "rb4xx-cpld", + .bus = &spi_bus_type, + .of_match_table = of_match_ptr(rb4xx_cpld_dt_match), + }, +}; + +module_spi_driver(rb4xx_cpld_driver); + +MODULE_DESCRIPTION("Mikrotik RB4xx CPLD driver"); +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); +MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>"); +MODULE_AUTHOR("Bert Vermeulen <bert@biot.com>"); +MODULE_AUTHOR("Christopher Hill <ch6574@gmail.com"); +MODULE_LICENSE("GPL v2"); diff --git a/target/linux/ath79/files/drivers/mtd/nand/raw/nand_rb4xx.c b/target/linux/ath79/files/drivers/mtd/nand/raw/nand_rb4xx.c new file mode 100644 index 0000000000..922d7095cb --- /dev/null +++ b/target/linux/ath79/files/drivers/mtd/nand/raw/nand_rb4xx.c @@ -0,0 +1,297 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * NAND driver for the MikroTik RouterBoard 4xx series + * + * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2015 Bert Vermeulen <bert@biot.com> + * Copyright (C) 2020 Christopher Hill <ch6574@gmail.com> + * + * This file was based on the driver for Linux 2.6.22 published by + * MikroTik for their RouterBoard 4xx series devices. + * + * N.B. driver probe reports "DMA mask not set" warnings which are + * an artifact of using a platform_driver as an MFD device child. + * See conversation here https://lkml.org/lkml/2020/4/28/675 + */ +#include <linux/platform_device.h> +#include <linux/mtd/rawnand.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/version.h> + +#include <mfd/rb4xx-cpld.h> + +struct rb4xx_nand { + struct rb4xx_cpld *cpld; + struct device *dev; + + struct nand_chip chip; + struct gpio_desc *ale; + struct gpio_desc *cle; + struct gpio_desc *nce; + struct gpio_desc *rdy; +}; + +static int rb4xx_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + switch (section) { + case 0: + oobregion->offset = 8; + oobregion->length = 3; + return 0; + case 1: + oobregion->offset = 13; + oobregion->length = 3; + return 0; + default: + return -ERANGE; + } +} + +static int rb4xx_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + switch (section) { + case 0: + oobregion->offset = 0; + oobregion->length = 4; + return 0; + case 1: + oobregion->offset = 4; + oobregion->length = 1; + return 0; + case 2: + oobregion->offset = 6; + oobregion->length = 2; + return 0; + case 3: + oobregion->offset = 11; + oobregion->length = 2; + return 0; + default: + return -ERANGE; + } +} + +static const struct mtd_ooblayout_ops rb4xx_nand_ecclayout_ops = { + .ecc = rb4xx_ooblayout_ecc, + .free = rb4xx_ooblayout_free, +}; + +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,20,0) +static uint8_t rb4xx_nand_read_byte(struct mtd_info *mtd) +{ + struct rb4xx_nand *nand = mtd->priv; +#else +static u8 rb4xx_nand_read_byte(struct nand_chip *chip) +{ + struct rb4xx_nand *nand = chip->priv; +#endif + struct rb4xx_cpld *cpld = nand->cpld; + u8 data; + int ret; + + ret = cpld->read_nand(cpld, &data, 1); + if (unlikely(ret)) + return 0xff; + + return data; +} + +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,20,0) +static void rb4xx_nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, + int len) +{ + struct rb4xx_nand *nand = mtd->priv; +#else +static void rb4xx_nand_write_buf(struct nand_chip *chip, const u8 *buf, int len) +{ + struct rb4xx_nand *nand = chip->priv; +#endif + struct rb4xx_cpld *cpld = nand->cpld; + + cpld->write_nand(cpld, buf, len); +} + +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,20,0) +static void rb4xx_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) +{ + struct rb4xx_nand *nand = mtd->priv; +#else +static void rb4xx_nand_read_buf(struct nand_chip *chip, u8 *buf, int len) +{ + struct rb4xx_nand *nand = chip->priv; +#endif + struct rb4xx_cpld *cpld = nand->cpld; + + cpld->read_nand(cpld, buf, len); +} + +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,20,0) +static void rb4xx_nand_cmd_ctrl(struct mtd_info *mtd, int dat, unsigned int ctrl) +{ + struct rb4xx_nand *nand = mtd->priv; +#else +static void rb4xx_nand_cmd_ctrl(struct nand_chip *chip, int dat, + unsigned int ctrl) +{ + struct rb4xx_nand *nand = chip->priv; +#endif + struct rb4xx_cpld *cpld = nand->cpld; + u8 data = dat; + + if (ctrl & NAND_CTRL_CHANGE) { + gpiod_set_value_cansleep(nand->cle, !!(ctrl & NAND_CLE)); + gpiod_set_value_cansleep(nand->ale, !!(ctrl & NAND_ALE)); + gpiod_set_value_cansleep(nand->nce, !(ctrl & NAND_NCE)); + } + + if (dat != NAND_CMD_NONE) + cpld->write_nand(cpld, &data, 1); +} + +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,20,0) +static int rb4xx_nand_dev_ready(struct mtd_info *mtd) +{ + struct rb4xx_nand *nand = mtd->priv; +#else +static int rb4xx_nand_dev_ready(struct nand_chip *chip) +{ + struct rb4xx_nand *nand = chip->priv; +#endif + + return gpiod_get_value_cansleep(nand->rdy); +} + +static int rb4xx_nand_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device *parent = dev->parent; + struct rb4xx_nand *nand; + struct mtd_info *mtd; + int ret; + + if (!parent) + return -ENODEV; + + nand = devm_kzalloc(dev, sizeof(*nand), GFP_KERNEL); + if (!nand) + return -ENOMEM; + + platform_set_drvdata(pdev, nand); + nand->cpld = dev_get_drvdata(parent); + nand->dev = dev; + + nand->ale = devm_gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW); + if (IS_ERR(nand->ale)) + dev_err(dev, "missing gpio ALE: %ld\n", PTR_ERR(nand->ale)); + + nand->cle = devm_gpiod_get_index(dev, NULL, 1, GPIOD_OUT_LOW); + if (IS_ERR(nand->cle)) + dev_err(dev, "missing gpio CLE: %ld\n", PTR_ERR(nand->cle)); + + nand->nce = devm_gpiod_get_index(dev, NULL, 2, GPIOD_OUT_LOW); + if (IS_ERR(nand->nce)) + dev_err(dev, "missing gpio nCE: %ld\n", PTR_ERR(nand->nce)); + + nand->rdy = devm_gpiod_get_index(dev, NULL, 3, GPIOD_IN); + if (IS_ERR(nand->rdy)) + dev_err(dev, "missing gpio RDY: %ld\n", PTR_ERR(nand->rdy)); + + if (IS_ERR(nand->ale) || IS_ERR(nand->cle) || + IS_ERR(nand->nce) || IS_ERR(nand->rdy)) + return -ENOENT; + + gpiod_set_consumer_name(nand->ale, "mikrotik:nand:ALE"); + gpiod_set_consumer_name(nand->cle, "mikrotik:nand:CLE"); + gpiod_set_consumer_name(nand->nce, "mikrotik:nand:nCE"); + gpiod_set_consumer_name(nand->rdy, "mikrotik:nand:RDY"); + + mtd = nand_to_mtd(&nand->chip); + mtd->priv = nand; + mtd->owner = THIS_MODULE; + mtd->dev.parent = dev; + mtd_set_of_node(mtd, dev->of_node); + + if (mtd->writesize == 512) + mtd_set_ooblayout(mtd, &rb4xx_nand_ecclayout_ops); + + nand->chip.ecc.mode = NAND_ECC_SOFT; + nand->chip.ecc.algo = NAND_ECC_HAMMING; + nand->chip.options = NAND_NO_SUBPAGE_WRITE; + nand->chip.priv = nand; + +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,20,0) + nand->chip.read_byte = rb4xx_nand_read_byte; + nand->chip.write_buf = rb4xx_nand_write_buf; + nand->chip.read_buf = rb4xx_nand_read_buf; + nand->chip.cmd_ctrl = rb4xx_nand_cmd_ctrl; + nand->chip.dev_ready = rb4xx_nand_dev_ready; + nand->chip.chip_delay = 25; + + ret = nand_scan(mtd, 1); +#else + nand->chip.legacy.read_byte = rb4xx_nand_read_byte; + nand->chip.legacy.write_buf = rb4xx_nand_write_buf; + nand->chip.legacy.read_buf = rb4xx_nand_read_buf; + nand->chip.legacy.cmd_ctrl = rb4xx_nand_cmd_ctrl; + nand->chip.legacy.dev_ready = rb4xx_nand_dev_ready; + nand->chip.legacy.chip_delay = 25; + + ret = nand_scan(&nand->chip, 1); +#endif + if (ret) + return -ENXIO; + + ret = mtd_device_register(mtd, NULL, 0); + if (ret) { +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,20,0) + nand_release(mtd); +#else + nand_release(&nand->chip); +#endif + return ret; + } + + return 0; +} + +static int rb4xx_nand_remove(struct platform_device *pdev) +{ + struct rb4xx_nand *nand = platform_get_drvdata(pdev); + +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,20,0) + nand_release(nand_to_mtd(&nand->chip)); +#else + nand_release(&nand->chip); +#endif + + return 0; +} + +static const struct platform_device_id rb4xx_nand_id_table[] = { + { "mikrotik,rb4xx-nand", }, + { }, +}; +MODULE_DEVICE_TABLE(platform, rb4xx_nand_id_table); + +static struct platform_driver rb4xx_nand_driver = { + .probe = rb4xx_nand_probe, + .remove = rb4xx_nand_remove, + .id_table = rb4xx_nand_id_table, + .driver = { + .name = "rb4xx-nand", + }, +}; + +module_platform_driver(rb4xx_nand_driver); + +MODULE_DESCRIPTION("Mikrotik RB4xx NAND driver"); +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); +MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>"); +MODULE_AUTHOR("Bert Vermeulen <bert@biot.com>"); +MODULE_AUTHOR("Christopher Hill <ch6574@gmail.com"); +MODULE_LICENSE("GPL v2"); diff --git a/target/linux/ath79/files/include/mfd/rb4xx-cpld.h b/target/linux/ath79/files/include/mfd/rb4xx-cpld.h new file mode 100644 index 0000000000..d73617bfb1 --- /dev/null +++ b/target/linux/ath79/files/include/mfd/rb4xx-cpld.h @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * CPLD driver for the MikroTik RouterBoard 4xx series + * + * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2015 Bert Vermeulen <bert@biot.com> + * Copyright (C) 2020 Christopher Hill <ch6574@gmail.com> + * + * This file was based on the driver for Linux 2.6.22 published by + * MikroTik for their RouterBoard 4xx series devices. + */ +#include <linux/spi/spi.h> + +struct rb4xx_cpld { + struct spi_device *spi; + + int (*write_nand)(struct rb4xx_cpld *self, const void *tx_buf, + unsigned int len); + int (*read_nand)(struct rb4xx_cpld *self, void *rx_buf, + unsigned int len); + + int (*gpio_set_0_7)(struct rb4xx_cpld *self, u8 values); + int (*gpio_set_8)(struct rb4xx_cpld *self, u8 value); +}; diff --git a/target/linux/ath79/patches-4.19/920-mikrotik-rb4xx.patch b/target/linux/ath79/patches-4.19/920-mikrotik-rb4xx.patch new file mode 100644 index 0000000000..8d84b9e1cd --- /dev/null +++ b/target/linux/ath79/patches-4.19/920-mikrotik-rb4xx.patch @@ -0,0 +1,69 @@ +--- a/drivers/mfd/Kconfig ++++ b/drivers/mfd/Kconfig +@@ -1899,5 +1899,13 @@ config RAVE_SP_CORE + Select this to get support for the Supervisory Processor + device found on several devices in RAVE line of hardware. + ++config MFD_RB4XX_CPLD ++ tristate "CPLD driver for Mikrotik RB4xx series boards ++ select MFD_CORE ++ depends on ATH79 || COMPILE_TEST ++ help ++ Enables support for the CPLD chip (NAND & GPIO) on Mikrotik ++ Routerboard RB4xx series. ++ + endmenu + endif +--- a/drivers/mfd/Makefile ++++ b/drivers/mfd/Makefile +@@ -241,3 +241,4 @@ obj-$(CONFIG_MFD_SC27XX_PMIC) += sprd-sc + obj-$(CONFIG_RAVE_SP_CORE) += rave-sp.o + obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o + ++obj-$(CONFIG_MFD_RB4XX_CPLD) += rb4xx-cpld.o +--- a/drivers/gpio/Kconfig ++++ b/drivers/gpio/Kconfig +@@ -1371,6 +1371,12 @@ config GPIO_XRA1403 + help + GPIO driver for EXAR XRA1403 16-bit SPI-based GPIO expander. + ++config GPIO_RB4XX ++ tristate "GPIO expander for Mikrotik RB4xx series boards" ++ depends on MFD_RB4XX_CPLD ++ help ++ GPIO driver for Mikrotik Routerboard RB4xx series. ++ + endmenu + + menu "USB GPIO expanders" +--- a/drivers/gpio/Makefile ++++ b/drivers/gpio/Makefile +@@ -159,3 +159,4 @@ obj-$(CONFIG_GPIO_ZEVIO) += gpio-zevio.o + obj-$(CONFIG_GPIO_ZYNQ) += gpio-zynq.o + obj-$(CONFIG_GPIO_ZX) += gpio-zx.o + obj-$(CONFIG_GPIO_LOONGSON1) += gpio-loongson1.o ++obj-$(CONFIG_GPIO_RB4XX) += gpio-rb4xx.o +--- a/drivers/mtd/nand/raw/Kconfig ++++ b/drivers/mtd/nand/raw/Kconfig +@@ -569,4 +569,11 @@ config MTD_NAND_AR934X + Enables support for NAND controller on Qualcomm Atheros SoCs. + This controller is found on AR934x and QCA955x SoCs. + ++config MTD_NAND_RB4XX ++ tristate "Support for NAND driver for Mikrotik RB4xx series boards" ++ depends on MFD_RB4XX_CPLD ++ help ++ Enables support for the NAND flash chip on Mikrotik Routerboard ++ RB4xx series. ++ + endif # MTD_NAND +--- a/drivers/mtd/nand/raw/Makefile ++++ b/drivers/mtd/nand/raw/Makefile +@@ -58,6 +58,7 @@ obj-$(CONFIG_MTD_NAND_QCOM) += qcom_nan + obj-$(CONFIG_MTD_NAND_MTK) += mtk_ecc.o mtk_nand.o + obj-$(CONFIG_MTD_NAND_TEGRA) += tegra_nand.o + obj-$(CONFIG_MTD_NAND_AR934X) += ar934x_nand.o ++obj-$(CONFIG_MTD_NAND_RB4XX) += nand_rb4xx.o + + nand-objs := nand_base.o nand_bbt.o nand_timings.o nand_ids.o + nand-objs += nand_amd.o diff --git a/target/linux/ath79/patches-5.4/920-mikrotik-rb4xx.patch b/target/linux/ath79/patches-5.4/920-mikrotik-rb4xx.patch new file mode 100644 index 0000000000..5540b8ae3a --- /dev/null +++ b/target/linux/ath79/patches-5.4/920-mikrotik-rb4xx.patch @@ -0,0 +1,72 @@ +--- a/drivers/mfd/Kconfig ++++ b/drivers/mfd/Kconfig +@@ -2012,5 +2012,13 @@ config RAVE_SP_CORE + Select this to get support for the Supervisory Processor + device found on several devices in RAVE line of hardware. + ++config MFD_RB4XX_CPLD ++ tristate "CPLD driver for Mikrotik RB4xx series boards ++ select MFD_CORE ++ depends on ATH79 || COMPILE_TEST ++ help ++ Enables support for the CPLD chip (NAND & GPIO) on Mikrotik ++ Routerboard RB4xx series. ++ + endmenu + endif +--- a/drivers/mfd/Makefile ++++ b/drivers/mfd/Makefile +@@ -256,3 +256,4 @@ obj-$(CONFIG_MFD_ROHM_BD70528) += rohm-b + obj-$(CONFIG_MFD_ROHM_BD718XX) += rohm-bd718x7.o + obj-$(CONFIG_MFD_STMFX) += stmfx.o + ++obj-$(CONFIG_MFD_RB4XX_CPLD) += rb4xx-cpld.o +--- a/drivers/gpio/Kconfig ++++ b/drivers/gpio/Kconfig +@@ -1406,6 +1406,12 @@ config GPIO_SODAVILLE + help + Say Y here to support Intel Sodaville GPIO. + ++config GPIO_RB4XX ++ tristate "GPIO expander for Mikrotik RB4xx series boards" ++ depends on MFD_RB4XX_CPLD ++ help ++ GPIO driver for Mikrotik Routerboard RB4xx series. ++ + endmenu + + menu "SPI GPIO expanders" +--- a/drivers/gpio/Makefile ++++ b/drivers/gpio/Makefile +@@ -113,6 +113,7 @@ obj-$(CONFIG_GPIO_PL061) += gpio-pl061. + obj-$(CONFIG_GPIO_PMIC_EIC_SPRD) += gpio-pmic-eic-sprd.o + obj-$(CONFIG_GPIO_PXA) += gpio-pxa.o + obj-$(CONFIG_GPIO_RASPBERRYPI_EXP) += gpio-raspberrypi-exp.o ++obj-$(CONFIG_GPIO_RB4XX) += gpio-rb4xx.o + obj-$(CONFIG_GPIO_RC5T583) += gpio-rc5t583.o + obj-$(CONFIG_GPIO_RCAR) += gpio-rcar.o + obj-$(CONFIG_GPIO_RDC321X) += gpio-rdc321x.o +--- a/drivers/mtd/nand/raw/Kconfig ++++ b/drivers/mtd/nand/raw/Kconfig +@@ -552,4 +552,11 @@ config MTD_NAND_AR934X + Enables support for NAND controller on Qualcomm Atheros SoCs. + This controller is found on AR934x and QCA955x SoCs. + ++config MTD_NAND_RB4XX ++ tristate "Support for NAND driver for Mikrotik RB4xx series boards" ++ depends on MFD_RB4XX_CPLD ++ help ++ Enables support for the NAND flash chip on Mikrotik Routerboard ++ RB4xx series. ++ + endif # MTD_RAW_NAND +--- a/drivers/mtd/nand/raw/Makefile ++++ b/drivers/mtd/nand/raw/Makefile +@@ -58,6 +58,7 @@ obj-$(CONFIG_MTD_NAND_TEGRA) += tegra_n + obj-$(CONFIG_MTD_NAND_STM32_FMC2) += stm32_fmc2_nand.o + obj-$(CONFIG_MTD_NAND_MESON) += meson_nand.o + obj-$(CONFIG_MTD_NAND_AR934X) += ar934x_nand.o ++obj-$(CONFIG_MTD_NAND_RB4XX) += nand_rb4xx.o + + nand-objs := nand_base.o nand_legacy.o nand_bbt.o nand_timings.o nand_ids.o + nand-objs += nand_onfi.o |