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Diffstat (limited to 'target/mips/mikrotik-rb4xx/patches/3.14.26/0001-mtd-add-rb4xx-nand-driver.patch')
-rw-r--r--target/mips/mikrotik-rb4xx/patches/3.14.26/0001-mtd-add-rb4xx-nand-driver.patch351
1 files changed, 351 insertions, 0 deletions
diff --git a/target/mips/mikrotik-rb4xx/patches/3.14.26/0001-mtd-add-rb4xx-nand-driver.patch b/target/mips/mikrotik-rb4xx/patches/3.14.26/0001-mtd-add-rb4xx-nand-driver.patch
new file mode 100644
index 000000000..8199de991
--- /dev/null
+++ b/target/mips/mikrotik-rb4xx/patches/3.14.26/0001-mtd-add-rb4xx-nand-driver.patch
@@ -0,0 +1,351 @@
+From 1e692cc0c53202b932eedabd0315107910c5b093 Mon Sep 17 00:00:00 2001
+From: Phil Sutter <phil@nwl.cc>
+Date: Tue, 13 May 2014 00:08:54 +0200
+Subject: [PATCH] mtd: add rb4xx nand driver
+
+---
+ drivers/mtd/nand/Kconfig | 4 +
+ drivers/mtd/nand/Makefile | 1 +
+ drivers/mtd/nand/rb4xx_nand.c | 305 ++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 310 insertions(+)
+ create mode 100644 drivers/mtd/nand/rb4xx_nand.c
+
+diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
+index 90ff447..bb01309 100644
+--- a/drivers/mtd/nand/Kconfig
++++ b/drivers/mtd/nand/Kconfig
+@@ -510,4 +510,8 @@ config MTD_NAND_XWAY
+ Enables support for NAND Flash chips on Lantiq XWAY SoCs. NAND is attached
+ to the External Bus Unit (EBU).
+
++config MTD_NAND_RB4XX
++ tristate "NAND flash driver for RouterBoard 4xx series"
++ depends on MTD_NAND && ATH79_MACH_RB4XX
++
+ endif # MTD_NAND
+diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
+index 542b568..e2b5e1c 100644
+--- a/drivers/mtd/nand/Makefile
++++ b/drivers/mtd/nand/Makefile
+@@ -31,6 +31,7 @@ obj-$(CONFIG_MTD_NAND_CM_X270) += cmx270_nand.o
+ obj-$(CONFIG_MTD_NAND_PXA3xx) += pxa3xx_nand.o
+ obj-$(CONFIG_MTD_NAND_TMIO) += tmio_nand.o
+ obj-$(CONFIG_MTD_NAND_PLATFORM) += plat_nand.o
++obj-$(CONFIG_MTD_NAND_RB4XX) += rb4xx_nand.o
+ obj-$(CONFIG_MTD_NAND_PASEMI) += pasemi_nand.o
+ obj-$(CONFIG_MTD_NAND_ORION) += orion_nand.o
+ obj-$(CONFIG_MTD_NAND_FSL_ELBC) += fsl_elbc_nand.o
+diff --git a/drivers/mtd/nand/rb4xx_nand.c b/drivers/mtd/nand/rb4xx_nand.c
+new file mode 100644
+index 0000000..5b9841b
+--- /dev/null
++++ b/drivers/mtd/nand/rb4xx_nand.c
+@@ -0,0 +1,305 @@
++/*
++ * 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/kernel.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/mtd/nand.h>
++#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;
++ struct mtd_info mtd;
++};
++
++/*
++ * 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 } }
++};
++
++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 = "rootfs",
++ .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, NULL, 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, NULL, 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;
++ 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;
++ info->mtd.priv = &info->chip;
++ info->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;
++
++ platform_set_drvdata(pdev, info);
++
++ ret = nand_scan_ident(&info->mtd, 1, NULL);
++ if (ret) {
++ ret = -ENXIO;
++ goto err_free_info;
++ }
++
++ if (info->mtd.writesize == 512)
++ info->chip.ecc.layout = &rb4xx_nand_ecclayout;
++
++ ret = nand_scan_tail(&info->mtd);
++ if (ret) {
++ return -ENXIO;
++ goto err_set_drvdata;
++ }
++
++ mtd_device_register(&info->mtd, rb4xx_nand_partitions,
++ ARRAY_SIZE(rb4xx_nand_partitions));
++ if (ret)
++ goto err_release_nand;
++
++ return 0;
++
++err_release_nand:
++ nand_release(&info->mtd);
++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->mtd);
++ 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");
+--
+1.8.5.3
+
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