diff options
Diffstat (limited to 'target/mips/mikrotik-rb4xx/patches/3.14.15/0007-spi-add-rb4xx-cpld-driver.patch')
-rw-r--r-- | target/mips/mikrotik-rb4xx/patches/3.14.15/0007-spi-add-rb4xx-cpld-driver.patch | 548 |
1 files changed, 548 insertions, 0 deletions
diff --git a/target/mips/mikrotik-rb4xx/patches/3.14.15/0007-spi-add-rb4xx-cpld-driver.patch b/target/mips/mikrotik-rb4xx/patches/3.14.15/0007-spi-add-rb4xx-cpld-driver.patch new file mode 100644 index 000000000..452f2e761 --- /dev/null +++ b/target/mips/mikrotik-rb4xx/patches/3.14.15/0007-spi-add-rb4xx-cpld-driver.patch @@ -0,0 +1,548 @@ +From bb8d2a4ebf63bc2f04f15a28c92652700416ff83 Mon Sep 17 00:00:00 2001 +From: Phil Sutter <phil@nwl.cc> +Date: Tue, 13 May 2014 00:20:04 +0200 +Subject: [PATCH] spi: add rb4xx cpld driver + +--- + arch/mips/include/asm/mach-ath79/rb4xx_cpld.h | 48 +++ + drivers/spi/Kconfig | 7 + + drivers/spi/Makefile | 1 + + drivers/spi/spi-rb4xx-cpld.c | 441 ++++++++++++++++++++++++++ + 4 files changed, 497 insertions(+) + create mode 100644 arch/mips/include/asm/mach-ath79/rb4xx_cpld.h + create mode 100644 drivers/spi/spi-rb4xx-cpld.c + +diff --git a/arch/mips/include/asm/mach-ath79/rb4xx_cpld.h b/arch/mips/include/asm/mach-ath79/rb4xx_cpld.h +new file mode 100644 +index 0000000..5b17e94 +--- /dev/null ++++ b/arch/mips/include/asm/mach-ath79/rb4xx_cpld.h +@@ -0,0 +1,48 @@ ++/* ++ * SPI driver definitions for the CPLD chip on the Mikrotik RB4xx boards ++ * ++ * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org> ++ * ++ * This file was based on the patches for Linux 2.6.27.39 published by ++ * MikroTik for their RouterBoard 4xx series devices. ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published ++ * by the Free Software Foundation. ++ */ ++ ++#define CPLD_GPIO_nLED1 0 ++#define CPLD_GPIO_nLED2 1 ++#define CPLD_GPIO_nLED3 2 ++#define CPLD_GPIO_nLED4 3 ++#define CPLD_GPIO_FAN 4 ++#define CPLD_GPIO_ALE 5 ++#define CPLD_GPIO_CLE 6 ++#define CPLD_GPIO_nCE 7 ++#define CPLD_GPIO_nLED5 8 ++ ++#define CPLD_NUM_GPIOS 9 ++ ++#define CPLD_CFG_nLED1 BIT(CPLD_GPIO_nLED1) ++#define CPLD_CFG_nLED2 BIT(CPLD_GPIO_nLED2) ++#define CPLD_CFG_nLED3 BIT(CPLD_GPIO_nLED3) ++#define CPLD_CFG_nLED4 BIT(CPLD_GPIO_nLED4) ++#define CPLD_CFG_FAN BIT(CPLD_GPIO_FAN) ++#define CPLD_CFG_ALE BIT(CPLD_GPIO_ALE) ++#define CPLD_CFG_CLE BIT(CPLD_GPIO_CLE) ++#define CPLD_CFG_nCE BIT(CPLD_GPIO_nCE) ++#define CPLD_CFG_nLED5 BIT(CPLD_GPIO_nLED5) ++ ++struct rb4xx_cpld_platform_data { ++ unsigned gpio_base; ++}; ++ ++extern int rb4xx_cpld_change_cfg(unsigned mask, unsigned value); ++extern int rb4xx_cpld_read(unsigned char *rx_buf, ++ const unsigned char *verify_buf, ++ unsigned cnt); ++extern int rb4xx_cpld_read_from(unsigned addr, ++ unsigned char *rx_buf, ++ const unsigned char *verify_buf, ++ unsigned cnt); ++extern int rb4xx_cpld_write(const unsigned char *buf, unsigned count); +diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig +index 721f3a7..dbd7e98 100644 +--- a/drivers/spi/Kconfig ++++ b/drivers/spi/Kconfig +@@ -577,6 +577,13 @@ config SPI_TLE62X0 + sysfs interface, with each line presented as a kind of GPIO + exposing both switch control and diagnostic feedback. + ++config SPI_RB4XX_CPLD ++ tristate "MikroTik RB4XX CPLD driver" ++ depends on ATH79_MACH_RB4XX ++ help ++ SPI driver for the Xilinx CPLD chip present on the ++ MikroTik RB4xx boards. ++ + # + # Add new SPI protocol masters in alphabetical order above this line + # +diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile +index e738c7a..50913ae 100644 +--- a/drivers/spi/Makefile ++++ b/drivers/spi/Makefile +@@ -60,6 +60,7 @@ spi-pxa2xx-platform-$(CONFIG_SPI_PXA2XX_DMA) += spi-pxa2xx-dma.o + obj-$(CONFIG_SPI_PXA2XX) += spi-pxa2xx-platform.o + obj-$(CONFIG_SPI_PXA2XX_PCI) += spi-pxa2xx-pci.o + obj-$(CONFIG_SPI_RB4XX) += spi-rb4xx.o ++obj-$(CONFIG_SPI_RB4XX_CPLD) += spi-rb4xx-cpld.o + obj-$(CONFIG_SPI_RSPI) += spi-rspi.o + obj-$(CONFIG_SPI_S3C24XX) += spi-s3c24xx-hw.o + spi-s3c24xx-hw-y := spi-s3c24xx.o +diff --git a/drivers/spi/spi-rb4xx-cpld.c b/drivers/spi/spi-rb4xx-cpld.c +new file mode 100644 +index 0000000..a8d5282 +--- /dev/null ++++ b/drivers/spi/spi-rb4xx-cpld.c +@@ -0,0 +1,441 @@ ++/* ++ * SPI driver for the CPLD chip on the Mikrotik RB4xx boards ++ * ++ * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org> ++ * ++ * This file was based on the patches for Linux 2.6.27.39 published by ++ * MikroTik for their RouterBoard 4xx series devices. ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License version 2 as published ++ * by the Free Software Foundation. ++ */ ++ ++#include <linux/types.h> ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/init.h> ++#include <linux/module.h> ++#include <linux/device.h> ++#include <linux/bitops.h> ++#include <linux/spi/spi.h> ++#include <linux/gpio.h> ++#include <linux/slab.h> ++ ++#include <asm/mach-ath79/rb4xx_cpld.h> ++ ++#define DRV_NAME "spi-rb4xx-cpld" ++#define DRV_DESC "RB4xx CPLD driver" ++#define DRV_VERSION "0.1.0" ++ ++#define CPLD_CMD_WRITE_NAND 0x08 /* send cmd, n x send data, send indle */ ++#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_LED5_ON 0x0c /* send cmd */ ++#define CPLD_CMD_LED5_OFF 0x0d /* send cmd */ ++ ++struct rb4xx_cpld { ++ struct spi_device *spi; ++ struct mutex lock; ++ struct gpio_chip chip; ++ unsigned int config; ++}; ++ ++static struct rb4xx_cpld *rb4xx_cpld; ++ ++static inline struct rb4xx_cpld *gpio_to_cpld(struct gpio_chip *chip) ++{ ++ return container_of(chip, struct rb4xx_cpld, chip); ++} ++ ++static int rb4xx_cpld_write_cmd(struct rb4xx_cpld *cpld, unsigned char cmd) ++{ ++ struct spi_transfer t[1]; ++ struct spi_message m; ++ unsigned char tx_buf[1]; ++ int err; ++ ++ spi_message_init(&m); ++ memset(&t, 0, sizeof(t)); ++ ++ t[0].tx_buf = tx_buf; ++ t[0].len = sizeof(tx_buf); ++ spi_message_add_tail(&t[0], &m); ++ ++ tx_buf[0] = cmd; ++ ++ err = spi_sync(cpld->spi, &m); ++ return err; ++} ++ ++static int rb4xx_cpld_write_cfg(struct rb4xx_cpld *cpld, unsigned char config) ++{ ++ struct spi_transfer t[1]; ++ struct spi_message m; ++ unsigned char cmd[2]; ++ int err; ++ ++ spi_message_init(&m); ++ memset(&t, 0, sizeof(t)); ++ ++ t[0].tx_buf = cmd; ++ t[0].len = sizeof(cmd); ++ spi_message_add_tail(&t[0], &m); ++ ++ cmd[0] = CPLD_CMD_WRITE_CFG; ++ cmd[1] = config; ++ ++ err = spi_sync(cpld->spi, &m); ++ return err; ++} ++ ++static int __rb4xx_cpld_change_cfg(struct rb4xx_cpld *cpld, unsigned mask, ++ unsigned value) ++{ ++ unsigned int config; ++ int err; ++ ++ config = cpld->config & ~mask; ++ config |= value; ++ ++ if ((cpld->config ^ config) & 0xff) { ++ err = rb4xx_cpld_write_cfg(cpld, config); ++ if (err) ++ return err; ++ } ++ ++ if ((cpld->config ^ config) & CPLD_CFG_nLED5) { ++ err = rb4xx_cpld_write_cmd(cpld, (value) ? CPLD_CMD_LED5_ON : ++ CPLD_CMD_LED5_OFF); ++ if (err) ++ return err; ++ } ++ ++ cpld->config = config; ++ return 0; ++} ++ ++int rb4xx_cpld_change_cfg(unsigned mask, unsigned value) ++{ ++ int ret; ++ ++ if (rb4xx_cpld == NULL) ++ return -ENODEV; ++ ++ mutex_lock(&rb4xx_cpld->lock); ++ ret = __rb4xx_cpld_change_cfg(rb4xx_cpld, mask, value); ++ mutex_unlock(&rb4xx_cpld->lock); ++ ++ return ret; ++} ++EXPORT_SYMBOL_GPL(rb4xx_cpld_change_cfg); ++ ++int rb4xx_cpld_read_from(unsigned addr, unsigned char *rx_buf, ++ const unsigned char *verify_buf, unsigned count) ++{ ++ const unsigned char cmd[5] = { ++ CPLD_CMD_READ_FAST, ++ (addr >> 16) & 0xff, ++ (addr >> 8) & 0xff, ++ addr & 0xff, ++ 0 ++ }; ++ struct spi_transfer t[2] = { ++ { ++ .tx_buf = &cmd, ++ .len = 5, ++ }, ++ { ++ .tx_buf = verify_buf, ++ .rx_buf = rx_buf, ++ .len = count, ++ .verify = (verify_buf != NULL), ++ }, ++ }; ++ struct spi_message m; ++ ++ if (rb4xx_cpld == NULL) ++ return -ENODEV; ++ ++ spi_message_init(&m); ++ m.fast_read = 1; ++ spi_message_add_tail(&t[0], &m); ++ spi_message_add_tail(&t[1], &m); ++ return spi_sync(rb4xx_cpld->spi, &m); ++} ++EXPORT_SYMBOL_GPL(rb4xx_cpld_read_from); ++ ++#if 0 ++int rb4xx_cpld_read(unsigned char *buf, unsigned char *verify_buf, ++ unsigned count) ++{ ++ struct spi_transfer t[2]; ++ struct spi_message m; ++ unsigned char cmd[2]; ++ ++ if (rb4xx_cpld == NULL) ++ return -ENODEV; ++ ++ spi_message_init(&m); ++ memset(&t, 0, sizeof(t)); ++ ++ /* send command */ ++ t[0].tx_buf = cmd; ++ t[0].len = sizeof(cmd); ++ spi_message_add_tail(&t[0], &m); ++ ++ cmd[0] = CPLD_CMD_READ_NAND; ++ cmd[1] = 0; ++ ++ /* read data */ ++ t[1].rx_buf = buf; ++ t[1].len = count; ++ spi_message_add_tail(&t[1], &m); ++ ++ return spi_sync(rb4xx_cpld->spi, &m); ++} ++#else ++int rb4xx_cpld_read(unsigned char *rx_buf, const unsigned char *verify_buf, ++ unsigned count) ++{ ++ static const unsigned char cmd[2] = { CPLD_CMD_READ_NAND, 0 }; ++ struct spi_transfer t[2] = { ++ { ++ .tx_buf = &cmd, ++ .len = 2, ++ }, { ++ .tx_buf = verify_buf, ++ .rx_buf = rx_buf, ++ .len = count, ++ .verify = (verify_buf != NULL), ++ }, ++ }; ++ struct spi_message m; ++ ++ if (rb4xx_cpld == NULL) ++ return -ENODEV; ++ ++ spi_message_init(&m); ++ spi_message_add_tail(&t[0], &m); ++ spi_message_add_tail(&t[1], &m); ++ return spi_sync(rb4xx_cpld->spi, &m); ++} ++#endif ++EXPORT_SYMBOL_GPL(rb4xx_cpld_read); ++ ++int rb4xx_cpld_write(const unsigned char *buf, unsigned count) ++{ ++#if 0 ++ struct spi_transfer t[3]; ++ struct spi_message m; ++ unsigned char cmd[1]; ++ ++ if (rb4xx_cpld == NULL) ++ return -ENODEV; ++ ++ memset(&t, 0, sizeof(t)); ++ spi_message_init(&m); ++ ++ /* send command */ ++ t[0].tx_buf = cmd; ++ t[0].len = sizeof(cmd); ++ spi_message_add_tail(&t[0], &m); ++ ++ cmd[0] = CPLD_CMD_WRITE_NAND; ++ ++ /* write data */ ++ t[1].tx_buf = buf; ++ t[1].len = count; ++ spi_message_add_tail(&t[1], &m); ++ ++ /* send idle */ ++ t[2].len = 1; ++ spi_message_add_tail(&t[2], &m); ++ ++ return spi_sync(rb4xx_cpld->spi, &m); ++#else ++ static const unsigned char cmd = CPLD_CMD_WRITE_NAND; ++ struct spi_transfer t[3] = { ++ { ++ .tx_buf = &cmd, ++ .len = 1, ++ }, { ++ .tx_buf = buf, ++ .len = count, ++ .fast_write = 1, ++ }, { ++ .len = 1, ++ .fast_write = 1, ++ }, ++ }; ++ struct spi_message m; ++ ++ if (rb4xx_cpld == NULL) ++ return -ENODEV; ++ ++ 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(rb4xx_cpld->spi, &m); ++#endif ++} ++EXPORT_SYMBOL_GPL(rb4xx_cpld_write); ++ ++static int rb4xx_cpld_gpio_get(struct gpio_chip *chip, unsigned offset) ++{ ++ struct rb4xx_cpld *cpld = gpio_to_cpld(chip); ++ int ret; ++ ++ mutex_lock(&cpld->lock); ++ ret = (cpld->config >> offset) & 1; ++ mutex_unlock(&cpld->lock); ++ ++ return ret; ++} ++ ++static void rb4xx_cpld_gpio_set(struct gpio_chip *chip, unsigned offset, ++ int value) ++{ ++ struct rb4xx_cpld *cpld = gpio_to_cpld(chip); ++ ++ mutex_lock(&cpld->lock); ++ __rb4xx_cpld_change_cfg(cpld, (1 << offset), !!value << offset); ++ mutex_unlock(&cpld->lock); ++} ++ ++static int rb4xx_cpld_gpio_direction_input(struct gpio_chip *chip, ++ unsigned offset) ++{ ++ return -EOPNOTSUPP; ++} ++ ++static int rb4xx_cpld_gpio_direction_output(struct gpio_chip *chip, ++ unsigned offset, ++ int value) ++{ ++ struct rb4xx_cpld *cpld = gpio_to_cpld(chip); ++ int ret; ++ ++ mutex_lock(&cpld->lock); ++ ret = __rb4xx_cpld_change_cfg(cpld, (1 << offset), !!value << offset); ++ mutex_unlock(&cpld->lock); ++ ++ return ret; ++} ++ ++static int rb4xx_cpld_gpio_init(struct rb4xx_cpld *cpld, unsigned int base) ++{ ++ int err; ++ ++ /* init config */ ++ cpld->config = CPLD_CFG_nLED1 | CPLD_CFG_nLED2 | CPLD_CFG_nLED3 | ++ CPLD_CFG_nLED4 | CPLD_CFG_nCE; ++ rb4xx_cpld_write_cfg(cpld, cpld->config); ++ ++ /* setup GPIO chip */ ++ cpld->chip.label = DRV_NAME; ++ ++ cpld->chip.get = rb4xx_cpld_gpio_get; ++ cpld->chip.set = rb4xx_cpld_gpio_set; ++ cpld->chip.direction_input = rb4xx_cpld_gpio_direction_input; ++ cpld->chip.direction_output = rb4xx_cpld_gpio_direction_output; ++ ++ cpld->chip.base = base; ++ cpld->chip.ngpio = CPLD_NUM_GPIOS; ++ cpld->chip.can_sleep = 1; ++ cpld->chip.dev = &cpld->spi->dev; ++ cpld->chip.owner = THIS_MODULE; ++ ++ err = gpiochip_add(&cpld->chip); ++ if (err) ++ dev_err(&cpld->spi->dev, "adding GPIO chip failed, err=%d\n", ++ err); ++ ++ return err; ++} ++ ++static int rb4xx_cpld_probe(struct spi_device *spi) ++{ ++ struct rb4xx_cpld *cpld; ++ struct rb4xx_cpld_platform_data *pdata; ++ int err; ++ ++ pdata = spi->dev.platform_data; ++ if (!pdata) { ++ dev_dbg(&spi->dev, "no platform data\n"); ++ return -EINVAL; ++ } ++ ++ cpld = kzalloc(sizeof(*cpld), GFP_KERNEL); ++ if (!cpld) { ++ dev_err(&spi->dev, "no memory for private data\n"); ++ return -ENOMEM; ++ } ++ ++ mutex_init(&cpld->lock); ++ cpld->spi = spi_dev_get(spi); ++ dev_set_drvdata(&spi->dev, cpld); ++ ++ spi->mode = SPI_MODE_0; ++ spi->bits_per_word = 8; ++ err = spi_setup(spi); ++ if (err) { ++ dev_err(&spi->dev, "spi_setup failed, err=%d\n", err); ++ goto err_drvdata; ++ } ++ ++ err = rb4xx_cpld_gpio_init(cpld, pdata->gpio_base); ++ if (err) ++ goto err_drvdata; ++ ++ rb4xx_cpld = cpld; ++ ++ return 0; ++ ++err_drvdata: ++ dev_set_drvdata(&spi->dev, NULL); ++ kfree(cpld); ++ ++ return err; ++} ++ ++static int rb4xx_cpld_remove(struct spi_device *spi) ++{ ++ struct rb4xx_cpld *cpld; ++ ++ rb4xx_cpld = NULL; ++ cpld = dev_get_drvdata(&spi->dev); ++ dev_set_drvdata(&spi->dev, NULL); ++ kfree(cpld); ++ ++ return 0; ++} ++ ++static struct spi_driver rb4xx_cpld_driver = { ++ .driver = { ++ .name = DRV_NAME, ++ .bus = &spi_bus_type, ++ .owner = THIS_MODULE, ++ }, ++ .probe = rb4xx_cpld_probe, ++ .remove = rb4xx_cpld_remove, ++}; ++ ++static int __init rb4xx_cpld_init(void) ++{ ++ return spi_register_driver(&rb4xx_cpld_driver); ++} ++module_init(rb4xx_cpld_init); ++ ++static void __exit rb4xx_cpld_exit(void) ++{ ++ spi_unregister_driver(&rb4xx_cpld_driver); ++} ++module_exit(rb4xx_cpld_exit); ++ ++MODULE_DESCRIPTION(DRV_DESC); ++MODULE_VERSION(DRV_VERSION); ++MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); ++MODULE_LICENSE("GPL v2"); +-- +1.8.5.3 + |