diff options
Diffstat (limited to 'target/linux/xburst/patches-2.6.35/050-nand.patch')
-rw-r--r-- | target/linux/xburst/patches-2.6.35/050-nand.patch | 601 |
1 files changed, 0 insertions, 601 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 deleted file mode 100644 index a9f69214f2..0000000000 --- a/target/linux/xburst/patches-2.6.35/050-nand.patch +++ /dev/null @@ -1,601 +0,0 @@ -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"); |