diff options
Diffstat (limited to 'target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c')
-rw-r--r-- | target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c | 396 |
1 files changed, 0 insertions, 396 deletions
diff --git a/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c b/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c deleted file mode 100644 index 7dde613131..0000000000 --- a/target/linux/ar71xx/files/drivers/mtd/nand/rb4xx_nand.c +++ /dev/null @@ -1,396 +0,0 @@ -/* - * NAND flash driver for the MikroTik RouterBoard 4xx series - * - * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org> - * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> - * - * This file was based on the driver for Linux 2.6.22 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/version.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#if LINUX_VERSION_CODE < KERNEL_VERSION(4,14,0) -#include <linux/mtd/nand.h> -#else -#include <linux/mtd/rawnand.h> -#endif -#include <linux/mtd/mtd.h> -#include <linux/mtd/partitions.h> -#include <linux/platform_device.h> -#include <linux/delay.h> -#include <linux/io.h> -#include <linux/gpio.h> -#include <linux/slab.h> - -#include <asm/mach-ath79/ath79.h> -#include <asm/mach-ath79/rb4xx_cpld.h> - -#define DRV_NAME "rb4xx-nand" -#define DRV_VERSION "0.2.0" -#define DRV_DESC "NAND flash driver for RouterBoard 4xx series" - -#define RB4XX_NAND_GPIO_READY 5 -#define RB4XX_NAND_GPIO_ALE 37 -#define RB4XX_NAND_GPIO_CLE 38 -#define RB4XX_NAND_GPIO_NCE 39 - -struct rb4xx_nand_info { - struct nand_chip chip; -#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0) - struct mtd_info mtd; -#endif -}; - -static inline struct rb4xx_nand_info *mtd_to_rbinfo(struct mtd_info *mtd) -{ -#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0) - return container_of(mtd, struct rb4xx_nand_info, mtd); -#else - struct nand_chip *chip = mtd_to_nand(mtd); - - return container_of(chip, struct rb4xx_nand_info, chip); -#endif -} - -static struct mtd_info *rbinfo_to_mtd(struct rb4xx_nand_info *nfc) -{ -#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0) - return &nfc->mtd; -#else - return nand_to_mtd(&nfc->chip); -#endif -} - -#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0) -/* - * We need to use the OLD Yaffs-1 OOB layout, otherwise the RB bootloader - * will not be able to find the kernel that we load. - */ -static struct nand_ecclayout rb4xx_nand_ecclayout = { - .eccbytes = 6, - .eccpos = { 8, 9, 10, 13, 14, 15 }, - .oobavail = 9, - .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } } -}; - -#else - -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, -}; -#endif /* < 4.6 */ - -static struct mtd_partition rb4xx_nand_partitions[] = { - { - .name = "booter", - .offset = 0, - .size = (256 * 1024), - .mask_flags = MTD_WRITEABLE, - }, - { - .name = "kernel", - .offset = (256 * 1024), - .size = (4 * 1024 * 1024) - (256 * 1024), - }, - { - .name = "ubi", - .offset = MTDPART_OFS_NXTBLK, - .size = MTDPART_SIZ_FULL, - }, -}; - -static int rb4xx_nand_dev_ready(struct mtd_info *mtd) -{ - return gpio_get_value_cansleep(RB4XX_NAND_GPIO_READY); -} - -static void rb4xx_nand_write_cmd(unsigned char cmd) -{ - unsigned char data = cmd; - int err; - - err = rb4xx_cpld_write(&data, 1); - if (err) - pr_err("rb4xx_nand: write cmd failed, err=%d\n", err); -} - -static void rb4xx_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, - unsigned int ctrl) -{ - if (ctrl & NAND_CTRL_CHANGE) { - gpio_set_value_cansleep(RB4XX_NAND_GPIO_CLE, - (ctrl & NAND_CLE) ? 1 : 0); - gpio_set_value_cansleep(RB4XX_NAND_GPIO_ALE, - (ctrl & NAND_ALE) ? 1 : 0); - gpio_set_value_cansleep(RB4XX_NAND_GPIO_NCE, - (ctrl & NAND_NCE) ? 0 : 1); - } - - if (cmd != NAND_CMD_NONE) - rb4xx_nand_write_cmd(cmd); -} - -static unsigned char rb4xx_nand_read_byte(struct mtd_info *mtd) -{ - unsigned char data = 0; - int err; - - err = rb4xx_cpld_read(&data, 1); - if (err) { - pr_err("rb4xx_nand: read data failed, err=%d\n", err); - data = 0xff; - } - - return data; -} - -static void rb4xx_nand_write_buf(struct mtd_info *mtd, const unsigned char *buf, - int len) -{ - int err; - - err = rb4xx_cpld_write(buf, len); - if (err) - pr_err("rb4xx_nand: write buf failed, err=%d\n", err); -} - -static void rb4xx_nand_read_buf(struct mtd_info *mtd, unsigned char *buf, - int len) -{ - int err; - - err = rb4xx_cpld_read(buf, len); - if (err) - pr_err("rb4xx_nand: read buf failed, err=%d\n", err); -} - -static int rb4xx_nand_probe(struct platform_device *pdev) -{ - struct rb4xx_nand_info *info; - struct mtd_info *mtd; - int ret; - - printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n"); - - ret = gpio_request(RB4XX_NAND_GPIO_READY, "NAND RDY"); - if (ret) { - dev_err(&pdev->dev, "unable to request gpio %d\n", - RB4XX_NAND_GPIO_READY); - goto err; - } - - ret = gpio_direction_input(RB4XX_NAND_GPIO_READY); - if (ret) { - dev_err(&pdev->dev, "unable to set input mode on gpio %d\n", - RB4XX_NAND_GPIO_READY); - goto err_free_gpio_ready; - } - - ret = gpio_request(RB4XX_NAND_GPIO_ALE, "NAND ALE"); - if (ret) { - dev_err(&pdev->dev, "unable to request gpio %d\n", - RB4XX_NAND_GPIO_ALE); - goto err_free_gpio_ready; - } - - ret = gpio_direction_output(RB4XX_NAND_GPIO_ALE, 0); - if (ret) { - dev_err(&pdev->dev, "unable to set output mode on gpio %d\n", - RB4XX_NAND_GPIO_ALE); - goto err_free_gpio_ale; - } - - ret = gpio_request(RB4XX_NAND_GPIO_CLE, "NAND CLE"); - if (ret) { - dev_err(&pdev->dev, "unable to request gpio %d\n", - RB4XX_NAND_GPIO_CLE); - goto err_free_gpio_ale; - } - - ret = gpio_direction_output(RB4XX_NAND_GPIO_CLE, 0); - if (ret) { - dev_err(&pdev->dev, "unable to set output mode on gpio %d\n", - RB4XX_NAND_GPIO_CLE); - goto err_free_gpio_cle; - } - - ret = gpio_request(RB4XX_NAND_GPIO_NCE, "NAND NCE"); - if (ret) { - dev_err(&pdev->dev, "unable to request gpio %d\n", - RB4XX_NAND_GPIO_NCE); - goto err_free_gpio_cle; - } - - ret = gpio_direction_output(RB4XX_NAND_GPIO_NCE, 1); - if (ret) { - dev_err(&pdev->dev, "unable to set output mode on gpio %d\n", - RB4XX_NAND_GPIO_ALE); - goto err_free_gpio_nce; - } - - info = kzalloc(sizeof(*info), GFP_KERNEL); - if (!info) { - dev_err(&pdev->dev, "rb4xx-nand: no memory for private data\n"); - ret = -ENOMEM; - goto err_free_gpio_nce; - } - - info->chip.priv = &info; - mtd = rbinfo_to_mtd(info); - -#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0) - mtd->priv = &info->chip; -#endif - mtd->owner = THIS_MODULE; - - info->chip.cmd_ctrl = rb4xx_nand_cmd_ctrl; - info->chip.dev_ready = rb4xx_nand_dev_ready; - info->chip.read_byte = rb4xx_nand_read_byte; - info->chip.write_buf = rb4xx_nand_write_buf; - info->chip.read_buf = rb4xx_nand_read_buf; - - info->chip.chip_delay = 25; - info->chip.ecc.mode = NAND_ECC_SOFT; -#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0) - info->chip.ecc.algo = NAND_ECC_HAMMING; -#endif - info->chip.options = NAND_NO_SUBPAGE_WRITE; - - platform_set_drvdata(pdev, info); - - ret = nand_scan_ident(mtd, 1, NULL); - if (ret) { - ret = -ENXIO; - goto err_free_info; - } - - if (mtd->writesize == 512) -#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0) - info->chip.ecc.layout = &rb4xx_nand_ecclayout; -#else - mtd_set_ooblayout(mtd, &rb4xx_nand_ecclayout_ops); -#endif - - ret = nand_scan_tail(mtd); - if (ret) { - return -ENXIO; - goto err_set_drvdata; - } - - mtd_device_register(mtd, rb4xx_nand_partitions, - ARRAY_SIZE(rb4xx_nand_partitions)); - if (ret) - goto err_release_nand; - - return 0; - -err_release_nand: - nand_release(&info->chip); -err_set_drvdata: - platform_set_drvdata(pdev, NULL); -err_free_info: - kfree(info); -err_free_gpio_nce: - gpio_free(RB4XX_NAND_GPIO_NCE); -err_free_gpio_cle: - gpio_free(RB4XX_NAND_GPIO_CLE); -err_free_gpio_ale: - gpio_free(RB4XX_NAND_GPIO_ALE); -err_free_gpio_ready: - gpio_free(RB4XX_NAND_GPIO_READY); -err: - return ret; -} - -static int rb4xx_nand_remove(struct platform_device *pdev) -{ - struct rb4xx_nand_info *info = platform_get_drvdata(pdev); - - nand_release(&info->chip); - platform_set_drvdata(pdev, NULL); - kfree(info); - gpio_free(RB4XX_NAND_GPIO_NCE); - gpio_free(RB4XX_NAND_GPIO_CLE); - gpio_free(RB4XX_NAND_GPIO_ALE); - gpio_free(RB4XX_NAND_GPIO_READY); - - return 0; -} - -static struct platform_driver rb4xx_nand_driver = { - .probe = rb4xx_nand_probe, - .remove = rb4xx_nand_remove, - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - }, -}; - -static int __init rb4xx_nand_init(void) -{ - return platform_driver_register(&rb4xx_nand_driver); -} - -static void __exit rb4xx_nand_exit(void) -{ - platform_driver_unregister(&rb4xx_nand_driver); -} - -module_init(rb4xx_nand_init); -module_exit(rb4xx_nand_exit); - -MODULE_DESCRIPTION(DRV_DESC); -MODULE_VERSION(DRV_VERSION); -MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); -MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>"); -MODULE_LICENSE("GPL v2"); |