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-rw-r--r--target/linux/xburst/patches-2.6.35/050-nand.patch601
1 files changed, 601 insertions, 0 deletions
diff --git a/target/linux/xburst/patches-2.6.35/050-nand.patch b/target/linux/xburst/patches-2.6.35/050-nand.patch
new file mode 100644
index 0000000000..a9f69214f2
--- /dev/null
+++ b/target/linux/xburst/patches-2.6.35/050-nand.patch
@@ -0,0 +1,601 @@
+From c09d9002953c1182843050df1d4c639dea4af7f6 Mon Sep 17 00:00:00 2001
+From: Lars-Peter Clausen <lars@metafoo.de>
+Date: Sat, 17 Jul 2010 11:15:29 +0000
+Subject: [PATCH] MTD: Nand: Add JZ4740 NAND driver
+
+Add support for the NAND controller on JZ4740 SoCs.
+
+Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
+Cc: David Woodhouse <dwmw2@infradead.org>
+Cc: linux-mtd@lists.infradead.org
+Cc: linux-mips@linux-mips.org
+Cc: linux-kernel@vger.kernel.org
+Patchwork: https://patchwork.linux-mips.org/patch/1470/
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+---
+ arch/mips/include/asm/mach-jz4740/jz4740_nand.h | 34 ++
+ drivers/mtd/nand/Kconfig | 6 +
+ drivers/mtd/nand/Makefile | 1 +
+ drivers/mtd/nand/jz4740_nand.c | 516 +++++++++++++++++++++++
+ 4 files changed, 557 insertions(+), 0 deletions(-)
+ create mode 100644 arch/mips/include/asm/mach-jz4740/jz4740_nand.h
+ create mode 100644 drivers/mtd/nand/jz4740_nand.c
+
+--- /dev/null
++++ b/arch/mips/include/asm/mach-jz4740/jz4740_nand.h
+@@ -0,0 +1,34 @@
++/*
++ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
++ * JZ4740 SoC NAND controller driver
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License as published by the
++ * Free Software Foundation; either version 2 of the License, or (at your
++ * option) any later version.
++ *
++ * You should have received a copy of the GNU General Public License along
++ * with this program; if not, write to the Free Software Foundation, Inc.,
++ * 675 Mass Ave, Cambridge, MA 02139, USA.
++ *
++ */
++
++#ifndef __ASM_MACH_JZ4740_JZ4740_NAND_H__
++#define __ASM_MACH_JZ4740_JZ4740_NAND_H__
++
++#include <linux/mtd/nand.h>
++#include <linux/mtd/partitions.h>
++
++struct jz_nand_platform_data {
++ int num_partitions;
++ struct mtd_partition *partitions;
++
++ struct nand_ecclayout *ecc_layout;
++
++ unsigned int busy_gpio;
++
++ void (*ident_callback)(struct platform_device *, struct nand_chip *,
++ struct mtd_partition **, int *num_partitions);
++};
++
++#endif
+--- a/drivers/mtd/nand/Kconfig
++++ b/drivers/mtd/nand/Kconfig
+@@ -526,4 +526,10 @@ config MTD_NAND_NUC900
+ This enables the driver for the NAND Flash on evaluation board based
+ on w90p910 / NUC9xx.
+
++config MTD_NAND_JZ4740
++ tristate "Support for JZ4740 SoC NAND controller"
++ depends on MACH_JZ4740
++ help
++ Enables support for NAND Flash on JZ4740 SoC based boards.
++
+ endif # MTD_NAND
+--- a/drivers/mtd/nand/Makefile
++++ b/drivers/mtd/nand/Makefile
+@@ -46,5 +46,6 @@ obj-$(CONFIG_MTD_NAND_NOMADIK) += nomad
+ obj-$(CONFIG_MTD_NAND_BCM_UMI) += bcm_umi_nand.o nand_bcm_umi.o
+ obj-$(CONFIG_MTD_NAND_MPC5121_NFC) += mpc5121_nfc.o
+ obj-$(CONFIG_MTD_NAND_RICOH) += r852.o
++obj-$(CONFIG_MTD_NAND_JZ4740) += jz4740_nand.o
+
+ nand-objs := nand_base.o nand_bbt.o
+--- /dev/null
++++ b/drivers/mtd/nand/jz4740_nand.c
+@@ -0,0 +1,516 @@
++/*
++ * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
++ * JZ4740 SoC NAND controller driver
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License as published by the
++ * Free Software Foundation; either version 2 of the License, or (at your
++ * option) any later version.
++ *
++ * You should have received a copy of the GNU General Public License along
++ * with this program; if not, write to the Free Software Foundation, Inc.,
++ * 675 Mass Ave, Cambridge, MA 02139, USA.
++ *
++ */
++
++#include <linux/ioport.h>
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/nand.h>
++#include <linux/mtd/partitions.h>
++
++#include <linux/gpio.h>
++
++#include <asm/mach-jz4740/jz4740_nand.h>
++
++#define JZ_REG_NAND_CTRL 0x50
++#define JZ_REG_NAND_ECC_CTRL 0x100
++#define JZ_REG_NAND_DATA 0x104
++#define JZ_REG_NAND_PAR0 0x108
++#define JZ_REG_NAND_PAR1 0x10C
++#define JZ_REG_NAND_PAR2 0x110
++#define JZ_REG_NAND_IRQ_STAT 0x114
++#define JZ_REG_NAND_IRQ_CTRL 0x118
++#define JZ_REG_NAND_ERR(x) (0x11C + ((x) << 2))
++
++#define JZ_NAND_ECC_CTRL_PAR_READY BIT(4)
++#define JZ_NAND_ECC_CTRL_ENCODING BIT(3)
++#define JZ_NAND_ECC_CTRL_RS BIT(2)
++#define JZ_NAND_ECC_CTRL_RESET BIT(1)
++#define JZ_NAND_ECC_CTRL_ENABLE BIT(0)
++
++#define JZ_NAND_STATUS_ERR_COUNT (BIT(31) | BIT(30) | BIT(29))
++#define JZ_NAND_STATUS_PAD_FINISH BIT(4)
++#define JZ_NAND_STATUS_DEC_FINISH BIT(3)
++#define JZ_NAND_STATUS_ENC_FINISH BIT(2)
++#define JZ_NAND_STATUS_UNCOR_ERROR BIT(1)
++#define JZ_NAND_STATUS_ERROR BIT(0)
++
++#define JZ_NAND_CTRL_ENABLE_CHIP(x) BIT((x) << 1)
++#define JZ_NAND_CTRL_ASSERT_CHIP(x) BIT(((x) << 1) + 1)
++
++#define JZ_NAND_MEM_ADDR_OFFSET 0x10000
++#define JZ_NAND_MEM_CMD_OFFSET 0x08000
++
++struct jz_nand {
++ struct mtd_info mtd;
++ struct nand_chip chip;
++ void __iomem *base;
++ struct resource *mem;
++
++ void __iomem *bank_base;
++ struct resource *bank_mem;
++
++ struct jz_nand_platform_data *pdata;
++ bool is_reading;
++};
++
++static inline struct jz_nand *mtd_to_jz_nand(struct mtd_info *mtd)
++{
++ return container_of(mtd, struct jz_nand, mtd);
++}
++
++static void jz_nand_cmd_ctrl(struct mtd_info *mtd, int dat, unsigned int ctrl)
++{
++ struct jz_nand *nand = mtd_to_jz_nand(mtd);
++ struct nand_chip *chip = mtd->priv;
++ uint32_t reg;
++
++ if (ctrl & NAND_CTRL_CHANGE) {
++ BUG_ON((ctrl & NAND_ALE) && (ctrl & NAND_CLE));
++ if (ctrl & NAND_ALE)
++ chip->IO_ADDR_W = nand->bank_base + JZ_NAND_MEM_ADDR_OFFSET;
++ else if (ctrl & NAND_CLE)
++ chip->IO_ADDR_W = nand->bank_base + JZ_NAND_MEM_CMD_OFFSET;
++ else
++ chip->IO_ADDR_W = nand->bank_base;
++
++ reg = readl(nand->base + JZ_REG_NAND_CTRL);
++ if (ctrl & NAND_NCE)
++ reg |= JZ_NAND_CTRL_ASSERT_CHIP(0);
++ else
++ reg &= ~JZ_NAND_CTRL_ASSERT_CHIP(0);
++ writel(reg, nand->base + JZ_REG_NAND_CTRL);
++ }
++ if (dat != NAND_CMD_NONE)
++ writeb(dat, chip->IO_ADDR_W);
++}
++
++static int jz_nand_dev_ready(struct mtd_info *mtd)
++{
++ struct jz_nand *nand = mtd_to_jz_nand(mtd);
++ return gpio_get_value_cansleep(nand->pdata->busy_gpio);
++}
++
++static void jz_nand_hwctl(struct mtd_info *mtd, int mode)
++{
++ struct jz_nand *nand = mtd_to_jz_nand(mtd);
++ uint32_t reg;
++
++ writel(0, nand->base + JZ_REG_NAND_IRQ_STAT);
++ reg = readl(nand->base + JZ_REG_NAND_ECC_CTRL);
++
++ reg |= JZ_NAND_ECC_CTRL_RESET;
++ reg |= JZ_NAND_ECC_CTRL_ENABLE;
++ reg |= JZ_NAND_ECC_CTRL_RS;
++
++ switch (mode) {
++ case NAND_ECC_READ:
++ reg &= ~JZ_NAND_ECC_CTRL_ENCODING;
++ nand->is_reading = true;
++ break;
++ case NAND_ECC_WRITE:
++ reg |= JZ_NAND_ECC_CTRL_ENCODING;
++ nand->is_reading = false;
++ break;
++ default:
++ break;
++ }
++
++ writel(reg, nand->base + JZ_REG_NAND_ECC_CTRL);
++}
++
++static int jz_nand_calculate_ecc_rs(struct mtd_info *mtd, const uint8_t *dat,
++ uint8_t *ecc_code)
++{
++ struct jz_nand *nand = mtd_to_jz_nand(mtd);
++ uint32_t reg, status;
++ int i;
++ unsigned int timeout = 1000;
++ static uint8_t empty_block_ecc[] = {0xcd, 0x9d, 0x90, 0x58, 0xf4,
++ 0x8b, 0xff, 0xb7, 0x6f};
++
++ if (nand->is_reading)
++ return 0;
++
++ do {
++ status = readl(nand->base + JZ_REG_NAND_IRQ_STAT);
++ } while (!(status & JZ_NAND_STATUS_ENC_FINISH) && --timeout);
++
++ if (timeout == 0)
++ return -1;
++
++ reg = readl(nand->base + JZ_REG_NAND_ECC_CTRL);
++ reg &= ~JZ_NAND_ECC_CTRL_ENABLE;
++ writel(reg, nand->base + JZ_REG_NAND_ECC_CTRL);
++
++ for (i = 0; i < 9; ++i)
++ ecc_code[i] = readb(nand->base + JZ_REG_NAND_PAR0 + i);
++
++ /* If the written data is completly 0xff, we also want to write 0xff as
++ * ecc, otherwise we will get in trouble when doing subpage writes. */
++ if (memcmp(ecc_code, empty_block_ecc, 9) == 0)
++ memset(ecc_code, 0xff, 9);
++
++ return 0;
++}
++
++static void jz_nand_correct_data(uint8_t *dat, int index, int mask)
++{
++ int offset = index & 0x7;
++ uint16_t data;
++
++ index += (index >> 3);
++
++ data = dat[index];
++ data |= dat[index+1] << 8;
++
++ mask ^= (data >> offset) & 0x1ff;
++ data &= ~(0x1ff << offset);
++ data |= (mask << offset);
++
++ dat[index] = data & 0xff;
++ dat[index+1] = (data >> 8) & 0xff;
++}
++
++static int jz_nand_correct_ecc_rs(struct mtd_info *mtd, uint8_t *dat,
++ uint8_t *read_ecc, uint8_t *calc_ecc)
++{
++ struct jz_nand *nand = mtd_to_jz_nand(mtd);
++ int i, error_count, index;
++ uint32_t reg, status, error;
++ uint32_t t;
++ unsigned int timeout = 1000;
++
++ t = read_ecc[0];
++
++ if (t == 0xff) {
++ for (i = 1; i < 9; ++i)
++ t &= read_ecc[i];
++
++ t &= dat[0];
++ t &= dat[nand->chip.ecc.size / 2];
++ t &= dat[nand->chip.ecc.size - 1];
++
++ if (t == 0xff) {
++ for (i = 1; i < nand->chip.ecc.size - 1; ++i)
++ t &= dat[i];
++ if (t == 0xff)
++ return 0;
++ }
++ }
++
++ for (i = 0; i < 9; ++i)
++ writeb(read_ecc[i], nand->base + JZ_REG_NAND_PAR0 + i);
++
++ reg = readl(nand->base + JZ_REG_NAND_ECC_CTRL);
++ reg |= JZ_NAND_ECC_CTRL_PAR_READY;
++ writel(reg, nand->base + JZ_REG_NAND_ECC_CTRL);
++
++ do {
++ status = readl(nand->base + JZ_REG_NAND_IRQ_STAT);
++ } while (!(status & JZ_NAND_STATUS_DEC_FINISH) && --timeout);
++
++ if (timeout == 0)
++ return -1;
++
++ reg = readl(nand->base + JZ_REG_NAND_ECC_CTRL);
++ reg &= ~JZ_NAND_ECC_CTRL_ENABLE;
++ writel(reg, nand->base + JZ_REG_NAND_ECC_CTRL);
++
++ if (status & JZ_NAND_STATUS_ERROR) {
++ if (status & JZ_NAND_STATUS_UNCOR_ERROR)
++ return -1;
++
++ error_count = (status & JZ_NAND_STATUS_ERR_COUNT) >> 29;
++
++ for (i = 0; i < error_count; ++i) {
++ error = readl(nand->base + JZ_REG_NAND_ERR(i));
++ index = ((error >> 16) & 0x1ff) - 1;
++ if (index >= 0 && index < 512)
++ jz_nand_correct_data(dat, index, error & 0x1ff);
++ }
++
++ return error_count;
++ }
++
++ return 0;
++}
++
++
++/* Copy paste of nand_read_page_hwecc_oob_first except for different eccpos
++ * handling. The ecc area is for 4k chips 72 bytes long and thus does not fit
++ * into the eccpos array. */
++static int jz_nand_read_page_hwecc_oob_first(struct mtd_info *mtd,
++ struct nand_chip *chip, uint8_t *buf, int page)
++{
++ int i, eccsize = chip->ecc.size;
++ int eccbytes = chip->ecc.bytes;
++ int eccsteps = chip->ecc.steps;
++ uint8_t *p = buf;
++ unsigned int ecc_offset = chip->page_shift;
++
++ /* Read the OOB area first */
++ chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
++ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
++ chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
++
++ for (i = ecc_offset; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
++ int stat;
++
++ chip->ecc.hwctl(mtd, NAND_ECC_READ);
++ chip->read_buf(mtd, p, eccsize);
++
++ stat = chip->ecc.correct(mtd, p, &chip->oob_poi[i], NULL);
++ if (stat < 0)
++ mtd->ecc_stats.failed++;
++ else
++ mtd->ecc_stats.corrected += stat;
++ }
++ return 0;
++}
++
++/* Copy-and-paste of nand_write_page_hwecc with different eccpos handling. */
++static void jz_nand_write_page_hwecc(struct mtd_info *mtd,
++ struct nand_chip *chip, const uint8_t *buf)
++{
++ int i, eccsize = chip->ecc.size;
++ int eccbytes = chip->ecc.bytes;
++ int eccsteps = chip->ecc.steps;
++ const uint8_t *p = buf;
++ unsigned int ecc_offset = chip->page_shift;
++
++ for (i = ecc_offset; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
++ chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
++ chip->write_buf(mtd, p, eccsize);
++ chip->ecc.calculate(mtd, p, &chip->oob_poi[i]);
++ }
++
++ chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
++}
++
++#ifdef CONFIG_MTD_CMDLINE_PARTS
++static const char *part_probes[] = {"cmdline", NULL};
++#endif
++
++static int jz_nand_ioremap_resource(struct platform_device *pdev,
++ const char *name, struct resource **res, void __iomem **base)
++{
++ int ret;
++
++ *res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
++ if (!*res) {
++ dev_err(&pdev->dev, "Failed to get platform %s memory\n", name);
++ ret = -ENXIO;
++ goto err;
++ }
++
++ *res = request_mem_region((*res)->start, resource_size(*res),
++ pdev->name);
++ if (!*res) {
++ dev_err(&pdev->dev, "Failed to request %s memory region\n", name);
++ ret = -EBUSY;
++ goto err;
++ }
++
++ *base = ioremap((*res)->start, resource_size(*res));
++ if (!*base) {
++ dev_err(&pdev->dev, "Failed to ioremap %s memory region\n", name);
++ ret = -EBUSY;
++ goto err_release_mem;
++ }
++
++ return 0;
++
++err_release_mem:
++ release_mem_region((*res)->start, resource_size(*res));
++err:
++ *res = NULL;
++ *base = NULL;
++ return ret;
++}
++
++static int __devinit jz_nand_probe(struct platform_device *pdev)
++{
++ int ret;
++ struct jz_nand *nand;
++ struct nand_chip *chip;
++ struct mtd_info *mtd;
++ struct jz_nand_platform_data *pdata = pdev->dev.platform_data;
++#ifdef CONFIG_MTD_PARTITIONS
++ struct mtd_partition *partition_info;
++ int num_partitions = 0;
++#endif
++
++ nand = kzalloc(sizeof(*nand), GFP_KERNEL);
++ if (!nand) {
++ dev_err(&pdev->dev, "Failed to allocate device structure.\n");
++ return -ENOMEM;
++ }
++
++ ret = jz_nand_ioremap_resource(pdev, "mmio", &nand->mem, &nand->base);
++ if (ret)
++ goto err_free;
++ ret = jz_nand_ioremap_resource(pdev, "bank", &nand->bank_mem,
++ &nand->bank_base);
++ if (ret)
++ goto err_iounmap_mmio;
++
++ if (pdata && gpio_is_valid(pdata->busy_gpio)) {
++ ret = gpio_request(pdata->busy_gpio, "NAND busy pin");
++ if (ret) {
++ dev_err(&pdev->dev,
++ "Failed to request busy gpio %d: %d\n",
++ pdata->busy_gpio, ret);
++ goto err_iounmap_mem;
++ }
++ }
++
++ mtd = &nand->mtd;
++ chip = &nand->chip;
++ mtd->priv = chip;
++ mtd->owner = THIS_MODULE;
++ mtd->name = "jz4740-nand";
++
++ chip->ecc.hwctl = jz_nand_hwctl;
++ chip->ecc.calculate = jz_nand_calculate_ecc_rs;
++ chip->ecc.correct = jz_nand_correct_ecc_rs;
++ chip->ecc.mode = NAND_ECC_HW_OOB_FIRST;
++ chip->ecc.size = 512;
++ chip->ecc.bytes = 9;
++
++ chip->ecc.read_page = jz_nand_read_page_hwecc_oob_first;
++ chip->ecc.write_page = jz_nand_write_page_hwecc;
++
++ if (pdata)
++ chip->ecc.layout = pdata->ecc_layout;
++
++ chip->chip_delay = 50;
++ chip->cmd_ctrl = jz_nand_cmd_ctrl;
++
++ if (pdata && gpio_is_valid(pdata->busy_gpio))
++ chip->dev_ready = jz_nand_dev_ready;
++
++ chip->IO_ADDR_R = nand->bank_base;
++ chip->IO_ADDR_W = nand->bank_base;
++
++ nand->pdata = pdata;
++ platform_set_drvdata(pdev, nand);
++
++ writel(JZ_NAND_CTRL_ENABLE_CHIP(0), nand->base + JZ_REG_NAND_CTRL);
++
++ ret = nand_scan_ident(mtd, 1, NULL);
++ if (ret) {
++ dev_err(&pdev->dev, "Failed to scan nand\n");
++ goto err_gpio_free;
++ }
++
++ if (pdata && pdata->ident_callback) {
++ pdata->ident_callback(pdev, chip, &pdata->partitions,
++ &pdata->num_partitions);
++ }
++
++ ret = nand_scan_tail(mtd);
++ if (ret) {
++ dev_err(&pdev->dev, "Failed to scan nand\n");
++ goto err_gpio_free;
++ }
++
++#ifdef CONFIG_MTD_PARTITIONS
++#ifdef CONFIG_MTD_CMDLINE_PARTS
++ num_partitions = parse_mtd_partitions(mtd, part_probes,
++ &partition_info, 0);
++#endif
++ if (num_partitions <= 0 && pdata) {
++ num_partitions = pdata->num_partitions;
++ partition_info = pdata->partitions;
++ }
++
++ if (num_partitions > 0)
++ ret = add_mtd_partitions(mtd, partition_info, num_partitions);
++ else
++#endif
++ ret = add_mtd_device(mtd);
++
++ if (ret) {
++ dev_err(&pdev->dev, "Failed to add mtd device\n");
++ goto err_nand_release;
++ }
++
++ dev_info(&pdev->dev, "Successfully registered JZ4740 NAND driver\n");
++
++ return 0;
++
++err_nand_release:
++ nand_release(&nand->mtd);
++err_gpio_free:
++ platform_set_drvdata(pdev, NULL);
++ gpio_free(pdata->busy_gpio);
++err_iounmap_mem:
++ iounmap(nand->bank_base);
++err_iounmap_mmio:
++ iounmap(nand->base);
++err_free:
++ kfree(nand);
++ return ret;
++}
++
++static int __devexit jz_nand_remove(struct platform_device *pdev)
++{
++ struct jz_nand *nand = platform_get_drvdata(pdev);
++
++ nand_release(&nand->mtd);
++
++ /* Deassert and disable all chips */
++ writel(0, nand->base + JZ_REG_NAND_CTRL);
++
++ iounmap(nand->bank_base);
++ release_mem_region(nand->bank_mem->start, resource_size(nand->bank_mem));
++ iounmap(nand->base);
++ release_mem_region(nand->mem->start, resource_size(nand->mem));
++
++ platform_set_drvdata(pdev, NULL);
++ kfree(nand);
++
++ return 0;
++}
++
++struct platform_driver jz_nand_driver = {
++ .probe = jz_nand_probe,
++ .remove = __devexit_p(jz_nand_remove),
++ .driver = {
++ .name = "jz4740-nand",
++ .owner = THIS_MODULE,
++ },
++};
++
++static int __init jz_nand_init(void)
++{
++ return platform_driver_register(&jz_nand_driver);
++}
++module_init(jz_nand_init);
++
++static void __exit jz_nand_exit(void)
++{
++ platform_driver_unregister(&jz_nand_driver);
++}
++module_exit(jz_nand_exit);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
++MODULE_DESCRIPTION("NAND controller driver for JZ4740 SoC");
++MODULE_ALIAS("platform:jz4740-nand");
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