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ath79: add Mikrotik rb4xx series drivers

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This adds 3 Mikrotik rb4xx series drivers as follows:

rb4xx-cpld: This is in the mfd subsystem, and is the parent CPLD device
that interfaces between the SoC SPI bus and its two children below.
rb4xx-gpio: This is the GPIO expander.
rb4xx-nand: This is the NAND driver.

The history of this code comes in three phases.

1. The first is a May 2015 attempt to push the equivalient ar71xx rb4xx
drivers upstream. See https://lore.kernel.org/patchwork/patch/940880/.

Module-author: Gabor Juhos <juhosg@openwrt.org>
Module-author: Imre Kaloz <kaloz@openwrt.org>
Module-author: Bert Vermeulen <bert@biot.com>

2. Next several ar71xx patches were applied bringing the code current.

commit 7bbf4117c6
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

commit af79fdbe4a
commit 889272d92d
commit e21cb649a2
commit 7c09fa4a74
Signed-off-by: Felix Fietkau <nbd@nbd.name>

3. Finally a heavy refactor to split the driver into the three new
subsystems, and updated to work with the device tree configuration, plus
updates and review feedback incorporated

Reviewed-by: Thibaut VARÈNE <hacks@slashdirt.org>
Signed-off-by: Christopher Hill <ch6574@gmail.com>
This commit is contained in:
Christopher Hill 2020-05-25 21:05:00 -04:00 committed by Adrian Schmutzler
parent 344e75eb2b
commit fa70b3a4bb
6 changed files with 817 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

172
target/linux/ath79/files/drivers/gpio/gpio-rb4xx.c Normal file
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// 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");

182
target/linux/ath79/files/drivers/mfd/rb4xx-cpld.c Normal file
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// 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");

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target/linux/ath79/files/drivers/mtd/nand/raw/nand_rb4xx.c Normal file
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// 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");

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target/linux/ath79/files/include/mfd/rb4xx-cpld.h Normal file
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// 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);
};

69
target/linux/ath79/patches-4.19/920-mikrotik-rb4xx.patch Normal file
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@ -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

72
target/linux/ath79/patches-5.4/920-mikrotik-rb4xx.patch Normal file
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@ -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