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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/mtd/nand/pxa3xx_nand.c
Initial import
Diffstat (limited to 'drivers/mtd/nand/pxa3xx_nand.c')
-rw-r--r--drivers/mtd/nand/pxa3xx_nand.c1940
1 files changed, 1940 insertions, 0 deletions
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
new file mode 100644
index 000000000..a4615fcc3
--- /dev/null
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -0,0 +1,1940 @@
+/*
+ * drivers/mtd/nand/pxa3xx_nand.c
+ *
+ * Copyright © 2005 Intel Corporation
+ * Copyright © 2006 Marvell International Ltd.
+ *
+ * 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.
+ *
+ * See Documentation/mtd/nand/pxa3xx-nand.txt for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_mtd.h>
+
+#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
+#define ARCH_HAS_DMA
+#endif
+
+#ifdef ARCH_HAS_DMA
+#include <mach/dma.h>
+#endif
+
+#include <linux/platform_data/mtd-nand-pxa3xx.h>
+
+#define CHIP_DELAY_TIMEOUT msecs_to_jiffies(200)
+#define NAND_STOP_DELAY msecs_to_jiffies(40)
+#define PAGE_CHUNK_SIZE (2048)
+
+/*
+ * Define a buffer size for the initial command that detects the flash device:
+ * STATUS, READID and PARAM. The largest of these is the PARAM command,
+ * needing 256 bytes.
+ */
+#define INIT_BUFFER_SIZE 256
+
+/* registers and bit definitions */
+#define NDCR (0x00) /* Control register */
+#define NDTR0CS0 (0x04) /* Timing Parameter 0 for CS0 */
+#define NDTR1CS0 (0x0C) /* Timing Parameter 1 for CS0 */
+#define NDSR (0x14) /* Status Register */
+#define NDPCR (0x18) /* Page Count Register */
+#define NDBDR0 (0x1C) /* Bad Block Register 0 */
+#define NDBDR1 (0x20) /* Bad Block Register 1 */
+#define NDECCCTRL (0x28) /* ECC control */
+#define NDDB (0x40) /* Data Buffer */
+#define NDCB0 (0x48) /* Command Buffer0 */
+#define NDCB1 (0x4C) /* Command Buffer1 */
+#define NDCB2 (0x50) /* Command Buffer2 */
+
+#define NDCR_SPARE_EN (0x1 << 31)
+#define NDCR_ECC_EN (0x1 << 30)
+#define NDCR_DMA_EN (0x1 << 29)
+#define NDCR_ND_RUN (0x1 << 28)
+#define NDCR_DWIDTH_C (0x1 << 27)
+#define NDCR_DWIDTH_M (0x1 << 26)
+#define NDCR_PAGE_SZ (0x1 << 24)
+#define NDCR_NCSX (0x1 << 23)
+#define NDCR_ND_MODE (0x3 << 21)
+#define NDCR_NAND_MODE (0x0)
+#define NDCR_CLR_PG_CNT (0x1 << 20)
+#define NDCR_STOP_ON_UNCOR (0x1 << 19)
+#define NDCR_RD_ID_CNT_MASK (0x7 << 16)
+#define NDCR_RD_ID_CNT(x) (((x) << 16) & NDCR_RD_ID_CNT_MASK)
+
+#define NDCR_RA_START (0x1 << 15)
+#define NDCR_PG_PER_BLK (0x1 << 14)
+#define NDCR_ND_ARB_EN (0x1 << 12)
+#define NDCR_INT_MASK (0xFFF)
+
+#define NDSR_MASK (0xfff)
+#define NDSR_ERR_CNT_OFF (16)
+#define NDSR_ERR_CNT_MASK (0x1f)
+#define NDSR_ERR_CNT(sr) ((sr >> NDSR_ERR_CNT_OFF) & NDSR_ERR_CNT_MASK)
+#define NDSR_RDY (0x1 << 12)
+#define NDSR_FLASH_RDY (0x1 << 11)
+#define NDSR_CS0_PAGED (0x1 << 10)
+#define NDSR_CS1_PAGED (0x1 << 9)
+#define NDSR_CS0_CMDD (0x1 << 8)
+#define NDSR_CS1_CMDD (0x1 << 7)
+#define NDSR_CS0_BBD (0x1 << 6)
+#define NDSR_CS1_BBD (0x1 << 5)
+#define NDSR_UNCORERR (0x1 << 4)
+#define NDSR_CORERR (0x1 << 3)
+#define NDSR_WRDREQ (0x1 << 2)
+#define NDSR_RDDREQ (0x1 << 1)
+#define NDSR_WRCMDREQ (0x1)
+
+#define NDCB0_LEN_OVRD (0x1 << 28)
+#define NDCB0_ST_ROW_EN (0x1 << 26)
+#define NDCB0_AUTO_RS (0x1 << 25)
+#define NDCB0_CSEL (0x1 << 24)
+#define NDCB0_EXT_CMD_TYPE_MASK (0x7 << 29)
+#define NDCB0_EXT_CMD_TYPE(x) (((x) << 29) & NDCB0_EXT_CMD_TYPE_MASK)
+#define NDCB0_CMD_TYPE_MASK (0x7 << 21)
+#define NDCB0_CMD_TYPE(x) (((x) << 21) & NDCB0_CMD_TYPE_MASK)
+#define NDCB0_NC (0x1 << 20)
+#define NDCB0_DBC (0x1 << 19)
+#define NDCB0_ADDR_CYC_MASK (0x7 << 16)
+#define NDCB0_ADDR_CYC(x) (((x) << 16) & NDCB0_ADDR_CYC_MASK)
+#define NDCB0_CMD2_MASK (0xff << 8)
+#define NDCB0_CMD1_MASK (0xff)
+#define NDCB0_ADDR_CYC_SHIFT (16)
+
+#define EXT_CMD_TYPE_DISPATCH 6 /* Command dispatch */
+#define EXT_CMD_TYPE_NAKED_RW 5 /* Naked read or Naked write */
+#define EXT_CMD_TYPE_READ 4 /* Read */
+#define EXT_CMD_TYPE_DISP_WR 4 /* Command dispatch with write */
+#define EXT_CMD_TYPE_FINAL 3 /* Final command */
+#define EXT_CMD_TYPE_LAST_RW 1 /* Last naked read/write */
+#define EXT_CMD_TYPE_MONO 0 /* Monolithic read/write */
+
+/* macros for registers read/write */
+#define nand_writel(info, off, val) \
+ writel_relaxed((val), (info)->mmio_base + (off))
+
+#define nand_readl(info, off) \
+ readl_relaxed((info)->mmio_base + (off))
+
+/* error code and state */
+enum {
+ ERR_NONE = 0,
+ ERR_DMABUSERR = -1,
+ ERR_SENDCMD = -2,
+ ERR_UNCORERR = -3,
+ ERR_BBERR = -4,
+ ERR_CORERR = -5,
+};
+
+enum {
+ STATE_IDLE = 0,
+ STATE_PREPARED,
+ STATE_CMD_HANDLE,
+ STATE_DMA_READING,
+ STATE_DMA_WRITING,
+ STATE_DMA_DONE,
+ STATE_PIO_READING,
+ STATE_PIO_WRITING,
+ STATE_CMD_DONE,
+ STATE_READY,
+};
+
+enum pxa3xx_nand_variant {
+ PXA3XX_NAND_VARIANT_PXA,
+ PXA3XX_NAND_VARIANT_ARMADA370,
+};
+
+struct pxa3xx_nand_host {
+ struct nand_chip chip;
+ struct mtd_info *mtd;
+ void *info_data;
+
+ /* page size of attached chip */
+ int use_ecc;
+ int cs;
+
+ /* calculated from pxa3xx_nand_flash data */
+ unsigned int col_addr_cycles;
+ unsigned int row_addr_cycles;
+ size_t read_id_bytes;
+
+};
+
+struct pxa3xx_nand_info {
+ struct nand_hw_control controller;
+ struct platform_device *pdev;
+
+ struct clk *clk;
+ void __iomem *mmio_base;
+ unsigned long mmio_phys;
+ struct completion cmd_complete, dev_ready;
+
+ unsigned int buf_start;
+ unsigned int buf_count;
+ unsigned int buf_size;
+ unsigned int data_buff_pos;
+ unsigned int oob_buff_pos;
+
+ /* DMA information */
+ int drcmr_dat;
+ int drcmr_cmd;
+
+ unsigned char *data_buff;
+ unsigned char *oob_buff;
+ dma_addr_t data_buff_phys;
+ int data_dma_ch;
+ struct pxa_dma_desc *data_desc;
+ dma_addr_t data_desc_addr;
+
+ struct pxa3xx_nand_host *host[NUM_CHIP_SELECT];
+ unsigned int state;
+
+ /*
+ * This driver supports NFCv1 (as found in PXA SoC)
+ * and NFCv2 (as found in Armada 370/XP SoC).
+ */
+ enum pxa3xx_nand_variant variant;
+
+ int cs;
+ int use_ecc; /* use HW ECC ? */
+ int ecc_bch; /* using BCH ECC? */
+ int use_dma; /* use DMA ? */
+ int use_spare; /* use spare ? */
+ int need_wait;
+
+ unsigned int data_size; /* data to be read from FIFO */
+ unsigned int chunk_size; /* split commands chunk size */
+ unsigned int oob_size;
+ unsigned int spare_size;
+ unsigned int ecc_size;
+ unsigned int ecc_err_cnt;
+ unsigned int max_bitflips;
+ int retcode;
+
+ /* cached register value */
+ uint32_t reg_ndcr;
+ uint32_t ndtr0cs0;
+ uint32_t ndtr1cs0;
+
+ /* generated NDCBx register values */
+ uint32_t ndcb0;
+ uint32_t ndcb1;
+ uint32_t ndcb2;
+ uint32_t ndcb3;
+};
+
+static bool use_dma = 1;
+module_param(use_dma, bool, 0444);
+MODULE_PARM_DESC(use_dma, "enable DMA for data transferring to/from NAND HW");
+
+static struct pxa3xx_nand_timing timing[] = {
+ { 40, 80, 60, 100, 80, 100, 90000, 400, 40, },
+ { 10, 0, 20, 40, 30, 40, 11123, 110, 10, },
+ { 10, 25, 15, 25, 15, 30, 25000, 60, 10, },
+ { 10, 35, 15, 25, 15, 25, 25000, 60, 10, },
+};
+
+static struct pxa3xx_nand_flash builtin_flash_types[] = {
+{ "DEFAULT FLASH", 0, 0, 2048, 8, 8, 0, &timing[0] },
+{ "64MiB 16-bit", 0x46ec, 32, 512, 16, 16, 4096, &timing[1] },
+{ "256MiB 8-bit", 0xdaec, 64, 2048, 8, 8, 2048, &timing[1] },
+{ "4GiB 8-bit", 0xd7ec, 128, 4096, 8, 8, 8192, &timing[1] },
+{ "128MiB 8-bit", 0xa12c, 64, 2048, 8, 8, 1024, &timing[2] },
+{ "128MiB 16-bit", 0xb12c, 64, 2048, 16, 16, 1024, &timing[2] },
+{ "512MiB 8-bit", 0xdc2c, 64, 2048, 8, 8, 4096, &timing[2] },
+{ "512MiB 16-bit", 0xcc2c, 64, 2048, 16, 16, 4096, &timing[2] },
+{ "256MiB 16-bit", 0xba20, 64, 2048, 16, 16, 2048, &timing[3] },
+};
+
+static u8 bbt_pattern[] = {'M', 'V', 'B', 'b', 't', '0' };
+static u8 bbt_mirror_pattern[] = {'1', 't', 'b', 'B', 'V', 'M' };
+
+static struct nand_bbt_descr bbt_main_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION,
+ .offs = 8,
+ .len = 6,
+ .veroffs = 14,
+ .maxblocks = 8, /* Last 8 blocks in each chip */
+ .pattern = bbt_pattern
+};
+
+static struct nand_bbt_descr bbt_mirror_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION,
+ .offs = 8,
+ .len = 6,
+ .veroffs = 14,
+ .maxblocks = 8, /* Last 8 blocks in each chip */
+ .pattern = bbt_mirror_pattern
+};
+
+static struct nand_ecclayout ecc_layout_2KB_bch4bit = {
+ .eccbytes = 32,
+ .eccpos = {
+ 32, 33, 34, 35, 36, 37, 38, 39,
+ 40, 41, 42, 43, 44, 45, 46, 47,
+ 48, 49, 50, 51, 52, 53, 54, 55,
+ 56, 57, 58, 59, 60, 61, 62, 63},
+ .oobfree = { {2, 30} }
+};
+
+static struct nand_ecclayout ecc_layout_4KB_bch4bit = {
+ .eccbytes = 64,
+ .eccpos = {
+ 32, 33, 34, 35, 36, 37, 38, 39,
+ 40, 41, 42, 43, 44, 45, 46, 47,
+ 48, 49, 50, 51, 52, 53, 54, 55,
+ 56, 57, 58, 59, 60, 61, 62, 63,
+ 96, 97, 98, 99, 100, 101, 102, 103,
+ 104, 105, 106, 107, 108, 109, 110, 111,
+ 112, 113, 114, 115, 116, 117, 118, 119,
+ 120, 121, 122, 123, 124, 125, 126, 127},
+ /* Bootrom looks in bytes 0 & 5 for bad blocks */
+ .oobfree = { {6, 26}, { 64, 32} }
+};
+
+static struct nand_ecclayout ecc_layout_4KB_bch8bit = {
+ .eccbytes = 128,
+ .eccpos = {
+ 32, 33, 34, 35, 36, 37, 38, 39,
+ 40, 41, 42, 43, 44, 45, 46, 47,
+ 48, 49, 50, 51, 52, 53, 54, 55,
+ 56, 57, 58, 59, 60, 61, 62, 63},
+ .oobfree = { }
+};
+
+/* Define a default flash type setting serve as flash detecting only */
+#define DEFAULT_FLASH_TYPE (&builtin_flash_types[0])
+
+#define NDTR0_tCH(c) (min((c), 7) << 19)
+#define NDTR0_tCS(c) (min((c), 7) << 16)
+#define NDTR0_tWH(c) (min((c), 7) << 11)
+#define NDTR0_tWP(c) (min((c), 7) << 8)
+#define NDTR0_tRH(c) (min((c), 7) << 3)
+#define NDTR0_tRP(c) (min((c), 7) << 0)
+
+#define NDTR1_tR(c) (min((c), 65535) << 16)
+#define NDTR1_tWHR(c) (min((c), 15) << 4)
+#define NDTR1_tAR(c) (min((c), 15) << 0)
+
+/* convert nano-seconds to nand flash controller clock cycles */
+#define ns2cycle(ns, clk) (int)((ns) * (clk / 1000000) / 1000)
+
+static const struct of_device_id pxa3xx_nand_dt_ids[] = {
+ {
+ .compatible = "marvell,pxa3xx-nand",
+ .data = (void *)PXA3XX_NAND_VARIANT_PXA,
+ },
+ {
+ .compatible = "marvell,armada370-nand",
+ .data = (void *)PXA3XX_NAND_VARIANT_ARMADA370,
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, pxa3xx_nand_dt_ids);
+
+static enum pxa3xx_nand_variant
+pxa3xx_nand_get_variant(struct platform_device *pdev)
+{
+ const struct of_device_id *of_id =
+ of_match_device(pxa3xx_nand_dt_ids, &pdev->dev);
+ if (!of_id)
+ return PXA3XX_NAND_VARIANT_PXA;
+ return (enum pxa3xx_nand_variant)of_id->data;
+}
+
+static void pxa3xx_nand_set_timing(struct pxa3xx_nand_host *host,
+ const struct pxa3xx_nand_timing *t)
+{
+ struct pxa3xx_nand_info *info = host->info_data;
+ unsigned long nand_clk = clk_get_rate(info->clk);
+ uint32_t ndtr0, ndtr1;
+
+ ndtr0 = NDTR0_tCH(ns2cycle(t->tCH, nand_clk)) |
+ NDTR0_tCS(ns2cycle(t->tCS, nand_clk)) |
+ NDTR0_tWH(ns2cycle(t->tWH, nand_clk)) |
+ NDTR0_tWP(ns2cycle(t->tWP, nand_clk)) |
+ NDTR0_tRH(ns2cycle(t->tRH, nand_clk)) |
+ NDTR0_tRP(ns2cycle(t->tRP, nand_clk));
+
+ ndtr1 = NDTR1_tR(ns2cycle(t->tR, nand_clk)) |
+ NDTR1_tWHR(ns2cycle(t->tWHR, nand_clk)) |
+ NDTR1_tAR(ns2cycle(t->tAR, nand_clk));
+
+ info->ndtr0cs0 = ndtr0;
+ info->ndtr1cs0 = ndtr1;
+ nand_writel(info, NDTR0CS0, ndtr0);
+ nand_writel(info, NDTR1CS0, ndtr1);
+}
+
+/*
+ * Set the data and OOB size, depending on the selected
+ * spare and ECC configuration.
+ * Only applicable to READ0, READOOB and PAGEPROG commands.
+ */
+static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info,
+ struct mtd_info *mtd)
+{
+ int oob_enable = info->reg_ndcr & NDCR_SPARE_EN;
+
+ info->data_size = mtd->writesize;
+ if (!oob_enable)
+ return;
+
+ info->oob_size = info->spare_size;
+ if (!info->use_ecc)
+ info->oob_size += info->ecc_size;
+}
+
+/**
+ * NOTE: it is a must to set ND_RUN firstly, then write
+ * command buffer, otherwise, it does not work.
+ * We enable all the interrupt at the same time, and
+ * let pxa3xx_nand_irq to handle all logic.
+ */
+static void pxa3xx_nand_start(struct pxa3xx_nand_info *info)
+{
+ uint32_t ndcr;
+
+ ndcr = info->reg_ndcr;
+
+ if (info->use_ecc) {
+ ndcr |= NDCR_ECC_EN;
+ if (info->ecc_bch)
+ nand_writel(info, NDECCCTRL, 0x1);
+ } else {
+ ndcr &= ~NDCR_ECC_EN;
+ if (info->ecc_bch)
+ nand_writel(info, NDECCCTRL, 0x0);
+ }
+
+ if (info->use_dma)
+ ndcr |= NDCR_DMA_EN;
+ else
+ ndcr &= ~NDCR_DMA_EN;
+
+ if (info->use_spare)
+ ndcr |= NDCR_SPARE_EN;
+ else
+ ndcr &= ~NDCR_SPARE_EN;
+
+ ndcr |= NDCR_ND_RUN;
+
+ /* clear status bits and run */
+ nand_writel(info, NDCR, 0);
+ nand_writel(info, NDSR, NDSR_MASK);
+ nand_writel(info, NDCR, ndcr);
+}
+
+static void pxa3xx_nand_stop(struct pxa3xx_nand_info *info)
+{
+ uint32_t ndcr;
+ int timeout = NAND_STOP_DELAY;
+
+ /* wait RUN bit in NDCR become 0 */
+ ndcr = nand_readl(info, NDCR);
+ while ((ndcr & NDCR_ND_RUN) && (timeout-- > 0)) {
+ ndcr = nand_readl(info, NDCR);
+ udelay(1);
+ }
+
+ if (timeout <= 0) {
+ ndcr &= ~NDCR_ND_RUN;
+ nand_writel(info, NDCR, ndcr);
+ }
+ /* clear status bits */
+ nand_writel(info, NDSR, NDSR_MASK);
+}
+
+static void __maybe_unused
+enable_int(struct pxa3xx_nand_info *info, uint32_t int_mask)
+{
+ uint32_t ndcr;
+
+ ndcr = nand_readl(info, NDCR);
+ nand_writel(info, NDCR, ndcr & ~int_mask);
+}
+
+static void disable_int(struct pxa3xx_nand_info *info, uint32_t int_mask)
+{
+ uint32_t ndcr;
+
+ ndcr = nand_readl(info, NDCR);
+ nand_writel(info, NDCR, ndcr | int_mask);
+}
+
+static void drain_fifo(struct pxa3xx_nand_info *info, void *data, int len)
+{
+ if (info->ecc_bch) {
+ int timeout;
+
+ /*
+ * According to the datasheet, when reading from NDDB
+ * with BCH enabled, after each 32 bytes reads, we
+ * have to make sure that the NDSR.RDDREQ bit is set.
+ *
+ * Drain the FIFO 8 32 bits reads at a time, and skip
+ * the polling on the last read.
+ */
+ while (len > 8) {
+ __raw_readsl(info->mmio_base + NDDB, data, 8);
+
+ for (timeout = 0;
+ !(nand_readl(info, NDSR) & NDSR_RDDREQ);
+ timeout++) {
+ if (timeout >= 5) {
+ dev_err(&info->pdev->dev,
+ "Timeout on RDDREQ while draining the FIFO\n");
+ return;
+ }
+
+ mdelay(1);
+ }
+
+ data += 32;
+ len -= 8;
+ }
+ }
+
+ __raw_readsl(info->mmio_base + NDDB, data, len);
+}
+
+static void handle_data_pio(struct pxa3xx_nand_info *info)
+{
+ unsigned int do_bytes = min(info->data_size, info->chunk_size);
+
+ switch (info->state) {
+ case STATE_PIO_WRITING:
+ __raw_writesl(info->mmio_base + NDDB,
+ info->data_buff + info->data_buff_pos,
+ DIV_ROUND_UP(do_bytes, 4));
+
+ if (info->oob_size > 0)
+ __raw_writesl(info->mmio_base + NDDB,
+ info->oob_buff + info->oob_buff_pos,
+ DIV_ROUND_UP(info->oob_size, 4));
+ break;
+ case STATE_PIO_READING:
+ drain_fifo(info,
+ info->data_buff + info->data_buff_pos,
+ DIV_ROUND_UP(do_bytes, 4));
+
+ if (info->oob_size > 0)
+ drain_fifo(info,
+ info->oob_buff + info->oob_buff_pos,
+ DIV_ROUND_UP(info->oob_size, 4));
+ break;
+ default:
+ dev_err(&info->pdev->dev, "%s: invalid state %d\n", __func__,
+ info->state);
+ BUG();
+ }
+
+ /* Update buffer pointers for multi-page read/write */
+ info->data_buff_pos += do_bytes;
+ info->oob_buff_pos += info->oob_size;
+ info->data_size -= do_bytes;
+}
+
+#ifdef ARCH_HAS_DMA
+static void start_data_dma(struct pxa3xx_nand_info *info)
+{
+ struct pxa_dma_desc *desc = info->data_desc;
+ int dma_len = ALIGN(info->data_size + info->oob_size, 32);
+
+ desc->ddadr = DDADR_STOP;
+ desc->dcmd = DCMD_ENDIRQEN | DCMD_WIDTH4 | DCMD_BURST32 | dma_len;
+
+ switch (info->state) {
+ case STATE_DMA_WRITING:
+ desc->dsadr = info->data_buff_phys;
+ desc->dtadr = info->mmio_phys + NDDB;
+ desc->dcmd |= DCMD_INCSRCADDR | DCMD_FLOWTRG;
+ break;
+ case STATE_DMA_READING:
+ desc->dtadr = info->data_buff_phys;
+ desc->dsadr = info->mmio_phys + NDDB;
+ desc->dcmd |= DCMD_INCTRGADDR | DCMD_FLOWSRC;
+ break;
+ default:
+ dev_err(&info->pdev->dev, "%s: invalid state %d\n", __func__,
+ info->state);
+ BUG();
+ }
+
+ DRCMR(info->drcmr_dat) = DRCMR_MAPVLD | info->data_dma_ch;
+ DDADR(info->data_dma_ch) = info->data_desc_addr;
+ DCSR(info->data_dma_ch) |= DCSR_RUN;
+}
+
+static void pxa3xx_nand_data_dma_irq(int channel, void *data)
+{
+ struct pxa3xx_nand_info *info = data;
+ uint32_t dcsr;
+
+ dcsr = DCSR(channel);
+ DCSR(channel) = dcsr;
+
+ if (dcsr & DCSR_BUSERR) {
+ info->retcode = ERR_DMABUSERR;
+ }
+
+ info->state = STATE_DMA_DONE;
+ enable_int(info, NDCR_INT_MASK);
+ nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ);
+}
+#else
+static void start_data_dma(struct pxa3xx_nand_info *info)
+{}
+#endif
+
+static irqreturn_t pxa3xx_nand_irq_thread(int irq, void *data)
+{
+ struct pxa3xx_nand_info *info = data;
+
+ handle_data_pio(info);
+
+ info->state = STATE_CMD_DONE;
+ nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pxa3xx_nand_irq(int irq, void *devid)
+{
+ struct pxa3xx_nand_info *info = devid;
+ unsigned int status, is_completed = 0, is_ready = 0;
+ unsigned int ready, cmd_done;
+ irqreturn_t ret = IRQ_HANDLED;
+
+ if (info->cs == 0) {
+ ready = NDSR_FLASH_RDY;
+ cmd_done = NDSR_CS0_CMDD;
+ } else {
+ ready = NDSR_RDY;
+ cmd_done = NDSR_CS1_CMDD;
+ }
+
+ status = nand_readl(info, NDSR);
+
+ if (status & NDSR_UNCORERR)
+ info->retcode = ERR_UNCORERR;
+ if (status & NDSR_CORERR) {
+ info->retcode = ERR_CORERR;
+ if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370 &&
+ info->ecc_bch)
+ info->ecc_err_cnt = NDSR_ERR_CNT(status);
+ else
+ info->ecc_err_cnt = 1;
+
+ /*
+ * Each chunk composing a page is corrected independently,
+ * and we need to store maximum number of corrected bitflips
+ * to return it to the MTD layer in ecc.read_page().
+ */
+ info->max_bitflips = max_t(unsigned int,
+ info->max_bitflips,
+ info->ecc_err_cnt);
+ }
+ if (status & (NDSR_RDDREQ | NDSR_WRDREQ)) {
+ /* whether use dma to transfer data */
+ if (info->use_dma) {
+ disable_int(info, NDCR_INT_MASK);
+ info->state = (status & NDSR_RDDREQ) ?
+ STATE_DMA_READING : STATE_DMA_WRITING;
+ start_data_dma(info);
+ goto NORMAL_IRQ_EXIT;
+ } else {
+ info->state = (status & NDSR_RDDREQ) ?
+ STATE_PIO_READING : STATE_PIO_WRITING;
+ ret = IRQ_WAKE_THREAD;
+ goto NORMAL_IRQ_EXIT;
+ }
+ }
+ if (status & cmd_done) {
+ info->state = STATE_CMD_DONE;
+ is_completed = 1;
+ }
+ if (status & ready) {
+ info->state = STATE_READY;
+ is_ready = 1;
+ }
+
+ if (status & NDSR_WRCMDREQ) {
+ nand_writel(info, NDSR, NDSR_WRCMDREQ);
+ status &= ~NDSR_WRCMDREQ;
+ info->state = STATE_CMD_HANDLE;
+
+ /*
+ * Command buffer registers NDCB{0-2} (and optionally NDCB3)
+ * must be loaded by writing directly either 12 or 16
+ * bytes directly to NDCB0, four bytes at a time.
+ *
+ * Direct write access to NDCB1, NDCB2 and NDCB3 is ignored
+ * but each NDCBx register can be read.
+ */
+ nand_writel(info, NDCB0, info->ndcb0);
+ nand_writel(info, NDCB0, info->ndcb1);
+ nand_writel(info, NDCB0, info->ndcb2);
+
+ /* NDCB3 register is available in NFCv2 (Armada 370/XP SoC) */
+ if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370)
+ nand_writel(info, NDCB0, info->ndcb3);
+ }
+
+ /* clear NDSR to let the controller exit the IRQ */
+ nand_writel(info, NDSR, status);
+ if (is_completed)
+ complete(&info->cmd_complete);
+ if (is_ready)
+ complete(&info->dev_ready);
+NORMAL_IRQ_EXIT:
+ return ret;
+}
+
+static inline int is_buf_blank(uint8_t *buf, size_t len)
+{
+ for (; len > 0; len--)
+ if (*buf++ != 0xff)
+ return 0;
+ return 1;
+}
+
+static void set_command_address(struct pxa3xx_nand_info *info,
+ unsigned int page_size, uint16_t column, int page_addr)
+{
+ /* small page addr setting */
+ if (page_size < PAGE_CHUNK_SIZE) {
+ info->ndcb1 = ((page_addr & 0xFFFFFF) << 8)
+ | (column & 0xFF);
+
+ info->ndcb2 = 0;
+ } else {
+ info->ndcb1 = ((page_addr & 0xFFFF) << 16)
+ | (column & 0xFFFF);
+
+ if (page_addr & 0xFF0000)
+ info->ndcb2 = (page_addr & 0xFF0000) >> 16;
+ else
+ info->ndcb2 = 0;
+ }
+}
+
+static void prepare_start_command(struct pxa3xx_nand_info *info, int command)
+{
+ struct pxa3xx_nand_host *host = info->host[info->cs];
+ struct mtd_info *mtd = host->mtd;
+
+ /* reset data and oob column point to handle data */
+ info->buf_start = 0;
+ info->buf_count = 0;
+ info->oob_size = 0;
+ info->data_buff_pos = 0;
+ info->oob_buff_pos = 0;
+ info->use_ecc = 0;
+ info->use_spare = 1;
+ info->retcode = ERR_NONE;
+ info->ecc_err_cnt = 0;
+ info->ndcb3 = 0;
+ info->need_wait = 0;
+
+ switch (command) {
+ case NAND_CMD_READ0:
+ case NAND_CMD_PAGEPROG:
+ info->use_ecc = 1;
+ case NAND_CMD_READOOB:
+ pxa3xx_set_datasize(info, mtd);
+ break;
+ case NAND_CMD_PARAM:
+ info->use_spare = 0;
+ break;
+ default:
+ info->ndcb1 = 0;
+ info->ndcb2 = 0;
+ break;
+ }
+
+ /*
+ * If we are about to issue a read command, or about to set
+ * the write address, then clean the data buffer.
+ */
+ if (command == NAND_CMD_READ0 ||
+ command == NAND_CMD_READOOB ||
+ command == NAND_CMD_SEQIN) {
+
+ info->buf_count = mtd->writesize + mtd->oobsize;
+ memset(info->data_buff, 0xFF, info->buf_count);
+ }
+
+}
+
+static int prepare_set_command(struct pxa3xx_nand_info *info, int command,
+ int ext_cmd_type, uint16_t column, int page_addr)
+{
+ int addr_cycle, exec_cmd;
+ struct pxa3xx_nand_host *host;
+ struct mtd_info *mtd;
+
+ host = info->host[info->cs];
+ mtd = host->mtd;
+ addr_cycle = 0;
+ exec_cmd = 1;
+
+ if (info->cs != 0)
+ info->ndcb0 = NDCB0_CSEL;
+ else
+ info->ndcb0 = 0;
+
+ if (command == NAND_CMD_SEQIN)
+ exec_cmd = 0;
+
+ addr_cycle = NDCB0_ADDR_CYC(host->row_addr_cycles
+ + host->col_addr_cycles);
+
+ switch (command) {
+ case NAND_CMD_READOOB:
+ case NAND_CMD_READ0:
+ info->buf_start = column;
+ info->ndcb0 |= NDCB0_CMD_TYPE(0)
+ | addr_cycle
+ | NAND_CMD_READ0;
+
+ if (command == NAND_CMD_READOOB)
+ info->buf_start += mtd->writesize;
+
+ /*
+ * Multiple page read needs an 'extended command type' field,
+ * which is either naked-read or last-read according to the
+ * state.
+ */
+ if (mtd->writesize == PAGE_CHUNK_SIZE) {
+ info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8);
+ } else if (mtd->writesize > PAGE_CHUNK_SIZE) {
+ info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8)
+ | NDCB0_LEN_OVRD
+ | NDCB0_EXT_CMD_TYPE(ext_cmd_type);
+ info->ndcb3 = info->chunk_size +
+ info->oob_size;
+ }
+
+ set_command_address(info, mtd->writesize, column, page_addr);
+ break;
+
+ case NAND_CMD_SEQIN:
+
+ info->buf_start = column;
+ set_command_address(info, mtd->writesize, 0, page_addr);
+
+ /*
+ * Multiple page programming needs to execute the initial
+ * SEQIN command that sets the page address.
+ */
+ if (mtd->writesize > PAGE_CHUNK_SIZE) {
+ info->ndcb0 |= NDCB0_CMD_TYPE(0x1)
+ | NDCB0_EXT_CMD_TYPE(ext_cmd_type)
+ | addr_cycle
+ | command;
+ /* No data transfer in this case */
+ info->data_size = 0;
+ exec_cmd = 1;
+ }
+ break;
+
+ case NAND_CMD_PAGEPROG:
+ if (is_buf_blank(info->data_buff,
+ (mtd->writesize + mtd->oobsize))) {
+ exec_cmd = 0;
+ break;
+ }
+
+ /* Second command setting for large pages */
+ if (mtd->writesize > PAGE_CHUNK_SIZE) {
+ /*
+ * Multiple page write uses the 'extended command'
+ * field. This can be used to issue a command dispatch
+ * or a naked-write depending on the current stage.
+ */
+ info->ndcb0 |= NDCB0_CMD_TYPE(0x1)
+ | NDCB0_LEN_OVRD
+ | NDCB0_EXT_CMD_TYPE(ext_cmd_type);
+ info->ndcb3 = info->chunk_size +
+ info->oob_size;
+
+ /*
+ * This is the command dispatch that completes a chunked
+ * page program operation.
+ */
+ if (info->data_size == 0) {
+ info->ndcb0 = NDCB0_CMD_TYPE(0x1)
+ | NDCB0_EXT_CMD_TYPE(ext_cmd_type)
+ | command;
+ info->ndcb1 = 0;
+ info->ndcb2 = 0;
+ info->ndcb3 = 0;
+ }
+ } else {
+ info->ndcb0 |= NDCB0_CMD_TYPE(0x1)
+ | NDCB0_AUTO_RS
+ | NDCB0_ST_ROW_EN
+ | NDCB0_DBC
+ | (NAND_CMD_PAGEPROG << 8)
+ | NAND_CMD_SEQIN
+ | addr_cycle;
+ }
+ break;
+
+ case NAND_CMD_PARAM:
+ info->buf_count = 256;
+ info->ndcb0 |= NDCB0_CMD_TYPE(0)
+ | NDCB0_ADDR_CYC(1)
+ | NDCB0_LEN_OVRD
+ | command;
+ info->ndcb1 = (column & 0xFF);
+ info->ndcb3 = 256;
+ info->data_size = 256;
+ break;
+
+ case NAND_CMD_READID:
+ info->buf_count = host->read_id_bytes;
+ info->ndcb0 |= NDCB0_CMD_TYPE(3)
+ | NDCB0_ADDR_CYC(1)
+ | command;
+ info->ndcb1 = (column & 0xFF);
+
+ info->data_size = 8;
+ break;
+ case NAND_CMD_STATUS:
+ info->buf_count = 1;
+ info->ndcb0 |= NDCB0_CMD_TYPE(4)
+ | NDCB0_ADDR_CYC(1)
+ | command;
+
+ info->data_size = 8;
+ break;
+
+ case NAND_CMD_ERASE1:
+ info->ndcb0 |= NDCB0_CMD_TYPE(2)
+ | NDCB0_AUTO_RS
+ | NDCB0_ADDR_CYC(3)
+ | NDCB0_DBC
+ | (NAND_CMD_ERASE2 << 8)
+ | NAND_CMD_ERASE1;
+ info->ndcb1 = page_addr;
+ info->ndcb2 = 0;
+
+ break;
+ case NAND_CMD_RESET:
+ info->ndcb0 |= NDCB0_CMD_TYPE(5)
+ | command;
+
+ break;
+
+ case NAND_CMD_ERASE2:
+ exec_cmd = 0;
+ break;
+
+ default:
+ exec_cmd = 0;
+ dev_err(&info->pdev->dev, "non-supported command %x\n",
+ command);
+ break;
+ }
+
+ return exec_cmd;
+}
+
+static void nand_cmdfunc(struct mtd_info *mtd, unsigned command,
+ int column, int page_addr)
+{
+ struct pxa3xx_nand_host *host = mtd->priv;
+ struct pxa3xx_nand_info *info = host->info_data;
+ int exec_cmd;
+
+ /*
+ * if this is a x16 device ,then convert the input
+ * "byte" address into a "word" address appropriate
+ * for indexing a word-oriented device
+ */
+ if (info->reg_ndcr & NDCR_DWIDTH_M)
+ column /= 2;
+
+ /*
+ * There may be different NAND chip hooked to
+ * different chip select, so check whether
+ * chip select has been changed, if yes, reset the timing
+ */
+ if (info->cs != host->cs) {
+ info->cs = host->cs;
+ nand_writel(info, NDTR0CS0, info->ndtr0cs0);
+ nand_writel(info, NDTR1CS0, info->ndtr1cs0);
+ }
+
+ prepare_start_command(info, command);
+
+ info->state = STATE_PREPARED;
+ exec_cmd = prepare_set_command(info, command, 0, column, page_addr);
+
+ if (exec_cmd) {
+ init_completion(&info->cmd_complete);
+ init_completion(&info->dev_ready);
+ info->need_wait = 1;
+ pxa3xx_nand_start(info);
+
+ if (!wait_for_completion_timeout(&info->cmd_complete,
+ CHIP_DELAY_TIMEOUT)) {
+ dev_err(&info->pdev->dev, "Wait time out!!!\n");
+ /* Stop State Machine for next command cycle */
+ pxa3xx_nand_stop(info);
+ }
+ }
+ info->state = STATE_IDLE;
+}
+
+static void nand_cmdfunc_extended(struct mtd_info *mtd,
+ const unsigned command,
+ int column, int page_addr)
+{
+ struct pxa3xx_nand_host *host = mtd->priv;
+ struct pxa3xx_nand_info *info = host->info_data;
+ int exec_cmd, ext_cmd_type;
+
+ /*
+ * if this is a x16 device then convert the input
+ * "byte" address into a "word" address appropriate
+ * for indexing a word-oriented device
+ */
+ if (info->reg_ndcr & NDCR_DWIDTH_M)
+ column /= 2;
+
+ /*
+ * There may be different NAND chip hooked to
+ * different chip select, so check whether
+ * chip select has been changed, if yes, reset the timing
+ */
+ if (info->cs != host->cs) {
+ info->cs = host->cs;
+ nand_writel(info, NDTR0CS0, info->ndtr0cs0);
+ nand_writel(info, NDTR1CS0, info->ndtr1cs0);
+ }
+
+ /* Select the extended command for the first command */
+ switch (command) {
+ case NAND_CMD_READ0:
+ case NAND_CMD_READOOB:
+ ext_cmd_type = EXT_CMD_TYPE_MONO;
+ break;
+ case NAND_CMD_SEQIN:
+ ext_cmd_type = EXT_CMD_TYPE_DISPATCH;
+ break;
+ case NAND_CMD_PAGEPROG:
+ ext_cmd_type = EXT_CMD_TYPE_NAKED_RW;
+ break;
+ default:
+ ext_cmd_type = 0;
+ break;
+ }
+
+ prepare_start_command(info, command);
+
+ /*
+ * Prepare the "is ready" completion before starting a command
+ * transaction sequence. If the command is not executed the
+ * completion will be completed, see below.
+ *
+ * We can do that inside the loop because the command variable
+ * is invariant and thus so is the exec_cmd.
+ */
+ info->need_wait = 1;
+ init_completion(&info->dev_ready);
+ do {
+ info->state = STATE_PREPARED;
+ exec_cmd = prepare_set_command(info, command, ext_cmd_type,
+ column, page_addr);
+ if (!exec_cmd) {
+ info->need_wait = 0;
+ complete(&info->dev_ready);
+ break;
+ }
+
+ init_completion(&info->cmd_complete);
+ pxa3xx_nand_start(info);
+
+ if (!wait_for_completion_timeout(&info->cmd_complete,
+ CHIP_DELAY_TIMEOUT)) {
+ dev_err(&info->pdev->dev, "Wait time out!!!\n");
+ /* Stop State Machine for next command cycle */
+ pxa3xx_nand_stop(info);
+ break;
+ }
+
+ /* Check if the sequence is complete */
+ if (info->data_size == 0 && command != NAND_CMD_PAGEPROG)
+ break;
+
+ /*
+ * After a splitted program command sequence has issued
+ * the command dispatch, the command sequence is complete.
+ */
+ if (info->data_size == 0 &&
+ command == NAND_CMD_PAGEPROG &&
+ ext_cmd_type == EXT_CMD_TYPE_DISPATCH)
+ break;
+
+ if (command == NAND_CMD_READ0 || command == NAND_CMD_READOOB) {
+ /* Last read: issue a 'last naked read' */
+ if (info->data_size == info->chunk_size)
+ ext_cmd_type = EXT_CMD_TYPE_LAST_RW;
+ else
+ ext_cmd_type = EXT_CMD_TYPE_NAKED_RW;
+
+ /*
+ * If a splitted program command has no more data to transfer,
+ * the command dispatch must be issued to complete.
+ */
+ } else if (command == NAND_CMD_PAGEPROG &&
+ info->data_size == 0) {
+ ext_cmd_type = EXT_CMD_TYPE_DISPATCH;
+ }
+ } while (1);
+
+ info->state = STATE_IDLE;
+}
+
+static int pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf, int oob_required)
+{
+ chip->write_buf(mtd, buf, mtd->writesize);
+ chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ return 0;
+}
+
+static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf, int oob_required,
+ int page)
+{
+ struct pxa3xx_nand_host *host = mtd->priv;
+ struct pxa3xx_nand_info *info = host->info_data;
+
+ chip->read_buf(mtd, buf, mtd->writesize);
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+
+ if (info->retcode == ERR_CORERR && info->use_ecc) {
+ mtd->ecc_stats.corrected += info->ecc_err_cnt;
+
+ } else if (info->retcode == ERR_UNCORERR) {
+ /*
+ * for blank page (all 0xff), HW will calculate its ECC as
+ * 0, which is different from the ECC information within
+ * OOB, ignore such uncorrectable errors
+ */
+ if (is_buf_blank(buf, mtd->writesize))
+ info->retcode = ERR_NONE;
+ else
+ mtd->ecc_stats.failed++;
+ }
+
+ return info->max_bitflips;
+}
+
+static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd)
+{
+ struct pxa3xx_nand_host *host = mtd->priv;
+ struct pxa3xx_nand_info *info = host->info_data;
+ char retval = 0xFF;
+
+ if (info->buf_start < info->buf_count)
+ /* Has just send a new command? */
+ retval = info->data_buff[info->buf_start++];
+
+ return retval;
+}
+
+static u16 pxa3xx_nand_read_word(struct mtd_info *mtd)
+{
+ struct pxa3xx_nand_host *host = mtd->priv;
+ struct pxa3xx_nand_info *info = host->info_data;
+ u16 retval = 0xFFFF;
+
+ if (!(info->buf_start & 0x01) && info->buf_start < info->buf_count) {
+ retval = *((u16 *)(info->data_buff+info->buf_start));
+ info->buf_start += 2;
+ }
+ return retval;
+}
+
+static void pxa3xx_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+ struct pxa3xx_nand_host *host = mtd->priv;
+ struct pxa3xx_nand_info *info = host->info_data;
+ int real_len = min_t(size_t, len, info->buf_count - info->buf_start);
+
+ memcpy(buf, info->data_buff + info->buf_start, real_len);
+ info->buf_start += real_len;
+}
+
+static void pxa3xx_nand_write_buf(struct mtd_info *mtd,
+ const uint8_t *buf, int len)
+{
+ struct pxa3xx_nand_host *host = mtd->priv;
+ struct pxa3xx_nand_info *info = host->info_data;
+ int real_len = min_t(size_t, len, info->buf_count - info->buf_start);
+
+ memcpy(info->data_buff + info->buf_start, buf, real_len);
+ info->buf_start += real_len;
+}
+
+static void pxa3xx_nand_select_chip(struct mtd_info *mtd, int chip)
+{
+ return;
+}
+
+static int pxa3xx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *this)
+{
+ struct pxa3xx_nand_host *host = mtd->priv;
+ struct pxa3xx_nand_info *info = host->info_data;
+
+ if (info->need_wait) {
+ info->need_wait = 0;
+ if (!wait_for_completion_timeout(&info->dev_ready,
+ CHIP_DELAY_TIMEOUT)) {
+ dev_err(&info->pdev->dev, "Ready time out!!!\n");
+ return NAND_STATUS_FAIL;
+ }
+ }
+
+ /* pxa3xx_nand_send_command has waited for command complete */
+ if (this->state == FL_WRITING || this->state == FL_ERASING) {
+ if (info->retcode == ERR_NONE)
+ return 0;
+ else
+ return NAND_STATUS_FAIL;
+ }
+
+ return NAND_STATUS_READY;
+}
+
+static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
+ const struct pxa3xx_nand_flash *f)
+{
+ struct platform_device *pdev = info->pdev;
+ struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct pxa3xx_nand_host *host = info->host[info->cs];
+ uint32_t ndcr = 0x0; /* enable all interrupts */
+
+ if (f->page_size != 2048 && f->page_size != 512) {
+ dev_err(&pdev->dev, "Current only support 2048 and 512 size\n");
+ return -EINVAL;
+ }
+
+ if (f->flash_width != 16 && f->flash_width != 8) {
+ dev_err(&pdev->dev, "Only support 8bit and 16 bit!\n");
+ return -EINVAL;
+ }
+
+ /* calculate flash information */
+ host->read_id_bytes = (f->page_size == 2048) ? 4 : 2;
+
+ /* calculate addressing information */
+ host->col_addr_cycles = (f->page_size == 2048) ? 2 : 1;
+
+ if (f->num_blocks * f->page_per_block > 65536)
+ host->row_addr_cycles = 3;
+ else
+ host->row_addr_cycles = 2;
+
+ ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0;
+ ndcr |= (host->col_addr_cycles == 2) ? NDCR_RA_START : 0;
+ ndcr |= (f->page_per_block == 64) ? NDCR_PG_PER_BLK : 0;
+ ndcr |= (f->page_size == 2048) ? NDCR_PAGE_SZ : 0;
+ ndcr |= (f->flash_width == 16) ? NDCR_DWIDTH_M : 0;
+ ndcr |= (f->dfc_width == 16) ? NDCR_DWIDTH_C : 0;
+
+ ndcr |= NDCR_RD_ID_CNT(host->read_id_bytes);
+ ndcr |= NDCR_SPARE_EN; /* enable spare by default */
+
+ info->reg_ndcr = ndcr;
+
+ pxa3xx_nand_set_timing(host, f->timing);
+ return 0;
+}
+
+static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
+{
+ /*
+ * We set 0 by hard coding here, for we don't support keep_config
+ * when there is more than one chip attached to the controller
+ */
+ struct pxa3xx_nand_host *host = info->host[0];
+ uint32_t ndcr = nand_readl(info, NDCR);
+
+ if (ndcr & NDCR_PAGE_SZ) {
+ /* Controller's FIFO size */
+ info->chunk_size = 2048;
+ host->read_id_bytes = 4;
+ } else {
+ info->chunk_size = 512;
+ host->read_id_bytes = 2;
+ }
+
+ /* Set an initial chunk size */
+ info->reg_ndcr = ndcr & ~NDCR_INT_MASK;
+ info->ndtr0cs0 = nand_readl(info, NDTR0CS0);
+ info->ndtr1cs0 = nand_readl(info, NDTR1CS0);
+ return 0;
+}
+
+#ifdef ARCH_HAS_DMA
+static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info)
+{
+ struct platform_device *pdev = info->pdev;
+ int data_desc_offset = info->buf_size - sizeof(struct pxa_dma_desc);
+
+ if (use_dma == 0) {
+ info->data_buff = kmalloc(info->buf_size, GFP_KERNEL);
+ if (info->data_buff == NULL)
+ return -ENOMEM;
+ return 0;
+ }
+
+ info->data_buff = dma_alloc_coherent(&pdev->dev, info->buf_size,
+ &info->data_buff_phys, GFP_KERNEL);
+ if (info->data_buff == NULL) {
+ dev_err(&pdev->dev, "failed to allocate dma buffer\n");
+ return -ENOMEM;
+ }
+
+ info->data_desc = (void *)info->data_buff + data_desc_offset;
+ info->data_desc_addr = info->data_buff_phys + data_desc_offset;
+
+ info->data_dma_ch = pxa_request_dma("nand-data", DMA_PRIO_LOW,
+ pxa3xx_nand_data_dma_irq, info);
+ if (info->data_dma_ch < 0) {
+ dev_err(&pdev->dev, "failed to request data dma\n");
+ dma_free_coherent(&pdev->dev, info->buf_size,
+ info->data_buff, info->data_buff_phys);
+ return info->data_dma_ch;
+ }
+
+ /*
+ * Now that DMA buffers are allocated we turn on
+ * DMA proper for I/O operations.
+ */
+ info->use_dma = 1;
+ return 0;
+}
+
+static void pxa3xx_nand_free_buff(struct pxa3xx_nand_info *info)
+{
+ struct platform_device *pdev = info->pdev;
+ if (info->use_dma) {
+ pxa_free_dma(info->data_dma_ch);
+ dma_free_coherent(&pdev->dev, info->buf_size,
+ info->data_buff, info->data_buff_phys);
+ } else {
+ kfree(info->data_buff);
+ }
+}
+#else
+static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info)
+{
+ info->data_buff = kmalloc(info->buf_size, GFP_KERNEL);
+ if (info->data_buff == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static void pxa3xx_nand_free_buff(struct pxa3xx_nand_info *info)
+{
+ kfree(info->data_buff);
+}
+#endif
+
+static int pxa3xx_nand_sensing(struct pxa3xx_nand_info *info)
+{
+ struct mtd_info *mtd;
+ struct nand_chip *chip;
+ int ret;
+
+ mtd = info->host[info->cs]->mtd;
+ chip = mtd->priv;
+
+ /* use the common timing to make a try */
+ ret = pxa3xx_nand_config_flash(info, &builtin_flash_types[0]);
+ if (ret)
+ return ret;
+
+ chip->cmdfunc(mtd, NAND_CMD_RESET, 0, 0);
+ ret = chip->waitfunc(mtd, chip);
+ if (ret & NAND_STATUS_FAIL)
+ return -ENODEV;
+
+ return 0;
+}
+
+static int pxa_ecc_init(struct pxa3xx_nand_info *info,
+ struct nand_ecc_ctrl *ecc,
+ int strength, int ecc_stepsize, int page_size)
+{
+ if (strength == 1 && ecc_stepsize == 512 && page_size == 2048) {
+ info->chunk_size = 2048;
+ info->spare_size = 40;
+ info->ecc_size = 24;
+ ecc->mode = NAND_ECC_HW;
+ ecc->size = 512;
+ ecc->strength = 1;
+
+ } else if (strength == 1 && ecc_stepsize == 512 && page_size == 512) {
+ info->chunk_size = 512;
+ info->spare_size = 8;
+ info->ecc_size = 8;
+ ecc->mode = NAND_ECC_HW;
+ ecc->size = 512;
+ ecc->strength = 1;
+
+ /*
+ * Required ECC: 4-bit correction per 512 bytes
+ * Select: 16-bit correction per 2048 bytes
+ */
+ } else if (strength == 4 && ecc_stepsize == 512 && page_size == 2048) {
+ info->ecc_bch = 1;
+ info->chunk_size = 2048;
+ info->spare_size = 32;
+ info->ecc_size = 32;
+ ecc->mode = NAND_ECC_HW;
+ ecc->size = info->chunk_size;
+ ecc->layout = &ecc_layout_2KB_bch4bit;
+ ecc->strength = 16;
+
+ } else if (strength == 4 && ecc_stepsize == 512 && page_size == 4096) {
+ info->ecc_bch = 1;
+ info->chunk_size = 2048;
+ info->spare_size = 32;
+ info->ecc_size = 32;
+ ecc->mode = NAND_ECC_HW;
+ ecc->size = info->chunk_size;
+ ecc->layout = &ecc_layout_4KB_bch4bit;
+ ecc->strength = 16;
+
+ /*
+ * Required ECC: 8-bit correction per 512 bytes
+ * Select: 16-bit correction per 1024 bytes
+ */
+ } else if (strength == 8 && ecc_stepsize == 512 && page_size == 4096) {
+ info->ecc_bch = 1;
+ info->chunk_size = 1024;
+ info->spare_size = 0;
+ info->ecc_size = 32;
+ ecc->mode = NAND_ECC_HW;
+ ecc->size = info->chunk_size;
+ ecc->layout = &ecc_layout_4KB_bch8bit;
+ ecc->strength = 16;
+ } else {
+ dev_err(&info->pdev->dev,
+ "ECC strength %d at page size %d is not supported\n",
+ strength, page_size);
+ return -ENODEV;
+ }
+
+ dev_info(&info->pdev->dev, "ECC strength %d, ECC step size %d\n",
+ ecc->strength, ecc->size);
+ return 0;
+}
+
+static int pxa3xx_nand_scan(struct mtd_info *mtd)
+{
+ struct pxa3xx_nand_host *host = mtd->priv;
+ struct pxa3xx_nand_info *info = host->info_data;
+ struct platform_device *pdev = info->pdev;
+ struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct nand_flash_dev pxa3xx_flash_ids[2], *def = NULL;
+ const struct pxa3xx_nand_flash *f = NULL;
+ struct nand_chip *chip = mtd->priv;
+ uint32_t id = -1;
+ uint64_t chipsize;
+ int i, ret, num;
+ uint16_t ecc_strength, ecc_step;
+
+ if (pdata->keep_config && !pxa3xx_nand_detect_config(info))
+ goto KEEP_CONFIG;
+
+ ret = pxa3xx_nand_sensing(info);
+ if (ret) {
+ dev_info(&info->pdev->dev, "There is no chip on cs %d!\n",
+ info->cs);
+
+ return ret;
+ }
+
+ chip->cmdfunc(mtd, NAND_CMD_READID, 0, 0);
+ id = *((uint16_t *)(info->data_buff));
+ if (id != 0)
+ dev_info(&info->pdev->dev, "Detect a flash id %x\n", id);
+ else {
+ dev_warn(&info->pdev->dev,
+ "Read out ID 0, potential timing set wrong!!\n");
+
+ return -EINVAL;
+ }
+
+ num = ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1;
+ for (i = 0; i < num; i++) {
+ if (i < pdata->num_flash)
+ f = pdata->flash + i;
+ else
+ f = &builtin_flash_types[i - pdata->num_flash + 1];
+
+ /* find the chip in default list */
+ if (f->chip_id == id)
+ break;
+ }
+
+ if (i >= (ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1)) {
+ dev_err(&info->pdev->dev, "ERROR!! flash not defined!!!\n");
+
+ return -EINVAL;
+ }
+
+ ret = pxa3xx_nand_config_flash(info, f);
+ if (ret) {
+ dev_err(&info->pdev->dev, "ERROR! Configure failed\n");
+ return ret;
+ }
+
+ memset(pxa3xx_flash_ids, 0, sizeof(pxa3xx_flash_ids));
+
+ pxa3xx_flash_ids[0].name = f->name;
+ pxa3xx_flash_ids[0].dev_id = (f->chip_id >> 8) & 0xffff;
+ pxa3xx_flash_ids[0].pagesize = f->page_size;
+ chipsize = (uint64_t)f->num_blocks * f->page_per_block * f->page_size;
+ pxa3xx_flash_ids[0].chipsize = chipsize >> 20;
+ pxa3xx_flash_ids[0].erasesize = f->page_size * f->page_per_block;
+ if (f->flash_width == 16)
+ pxa3xx_flash_ids[0].options = NAND_BUSWIDTH_16;
+ pxa3xx_flash_ids[1].name = NULL;
+ def = pxa3xx_flash_ids;
+KEEP_CONFIG:
+ if (info->reg_ndcr & NDCR_DWIDTH_M)
+ chip->options |= NAND_BUSWIDTH_16;
+
+ /* Device detection must be done with ECC disabled */
+ if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370)
+ nand_writel(info, NDECCCTRL, 0x0);
+
+ if (nand_scan_ident(mtd, 1, def))
+ return -ENODEV;
+
+ if (pdata->flash_bbt) {
+ /*
+ * We'll use a bad block table stored in-flash and don't
+ * allow writing the bad block marker to the flash.
+ */
+ chip->bbt_options |= NAND_BBT_USE_FLASH |
+ NAND_BBT_NO_OOB_BBM;
+ chip->bbt_td = &bbt_main_descr;
+ chip->bbt_md = &bbt_mirror_descr;
+ }
+
+ /*
+ * If the page size is bigger than the FIFO size, let's check
+ * we are given the right variant and then switch to the extended
+ * (aka splitted) command handling,
+ */
+ if (mtd->writesize > PAGE_CHUNK_SIZE) {
+ if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370) {
+ chip->cmdfunc = nand_cmdfunc_extended;
+ } else {
+ dev_err(&info->pdev->dev,
+ "unsupported page size on this variant\n");
+ return -ENODEV;
+ }
+ }
+
+ if (pdata->ecc_strength && pdata->ecc_step_size) {
+ ecc_strength = pdata->ecc_strength;
+ ecc_step = pdata->ecc_step_size;
+ } else {
+ ecc_strength = chip->ecc_strength_ds;
+ ecc_step = chip->ecc_step_ds;
+ }
+
+ /* Set default ECC strength requirements on non-ONFI devices */
+ if (ecc_strength < 1 && ecc_step < 1) {
+ ecc_strength = 1;
+ ecc_step = 512;
+ }
+
+ ret = pxa_ecc_init(info, &chip->ecc, ecc_strength,
+ ecc_step, mtd->writesize);
+ if (ret)
+ return ret;
+
+ /* calculate addressing information */
+ if (mtd->writesize >= 2048)
+ host->col_addr_cycles = 2;
+ else
+ host->col_addr_cycles = 1;
+
+ /* release the initial buffer */
+ kfree(info->data_buff);
+
+ /* allocate the real data + oob buffer */
+ info->buf_size = mtd->writesize + mtd->oobsize;
+ ret = pxa3xx_nand_init_buff(info);
+ if (ret)
+ return ret;
+ info->oob_buff = info->data_buff + mtd->writesize;
+
+ if ((mtd->size >> chip->page_shift) > 65536)
+ host->row_addr_cycles = 3;
+ else
+ host->row_addr_cycles = 2;
+ return nand_scan_tail(mtd);
+}
+
+static int alloc_nand_resource(struct platform_device *pdev)
+{
+ struct pxa3xx_nand_platform_data *pdata;
+ struct pxa3xx_nand_info *info;
+ struct pxa3xx_nand_host *host;
+ struct nand_chip *chip = NULL;
+ struct mtd_info *mtd;
+ struct resource *r;
+ int ret, irq, cs;
+
+ pdata = dev_get_platdata(&pdev->dev);
+ if (pdata->num_cs <= 0)
+ return -ENODEV;
+ info = devm_kzalloc(&pdev->dev, sizeof(*info) + (sizeof(*mtd) +
+ sizeof(*host)) * pdata->num_cs, GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->pdev = pdev;
+ info->variant = pxa3xx_nand_get_variant(pdev);
+ for (cs = 0; cs < pdata->num_cs; cs++) {
+ mtd = (struct mtd_info *)((unsigned int)&info[1] +
+ (sizeof(*mtd) + sizeof(*host)) * cs);
+ chip = (struct nand_chip *)(&mtd[1]);
+ host = (struct pxa3xx_nand_host *)chip;
+ info->host[cs] = host;
+ host->mtd = mtd;
+ host->cs = cs;
+ host->info_data = info;
+ mtd->priv = host;
+ mtd->owner = THIS_MODULE;
+
+ chip->ecc.read_page = pxa3xx_nand_read_page_hwecc;
+ chip->ecc.write_page = pxa3xx_nand_write_page_hwecc;
+ chip->controller = &info->controller;
+ chip->waitfunc = pxa3xx_nand_waitfunc;
+ chip->select_chip = pxa3xx_nand_select_chip;
+ chip->read_word = pxa3xx_nand_read_word;
+ chip->read_byte = pxa3xx_nand_read_byte;
+ chip->read_buf = pxa3xx_nand_read_buf;
+ chip->write_buf = pxa3xx_nand_write_buf;
+ chip->options |= NAND_NO_SUBPAGE_WRITE;
+ chip->cmdfunc = nand_cmdfunc;
+ }
+
+ spin_lock_init(&chip->controller->lock);
+ init_waitqueue_head(&chip->controller->wq);
+ info->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(info->clk)) {
+ dev_err(&pdev->dev, "failed to get nand clock\n");
+ return PTR_ERR(info->clk);
+ }
+ ret = clk_prepare_enable(info->clk);
+ if (ret < 0)
+ return ret;
+
+ if (use_dma) {
+ /*
+ * This is a dirty hack to make this driver work from
+ * devicetree bindings. It can be removed once we have
+ * a prober DMA controller framework for DT.
+ */
+ if (pdev->dev.of_node &&
+ of_machine_is_compatible("marvell,pxa3xx")) {
+ info->drcmr_dat = 97;
+ info->drcmr_cmd = 99;
+ } else {
+ r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (r == NULL) {
+ dev_err(&pdev->dev,
+ "no resource defined for data DMA\n");
+ ret = -ENXIO;
+ goto fail_disable_clk;
+ }
+ info->drcmr_dat = r->start;
+
+ r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
+ if (r == NULL) {
+ dev_err(&pdev->dev,
+ "no resource defined for cmd DMA\n");
+ ret = -ENXIO;
+ goto fail_disable_clk;
+ }
+ info->drcmr_cmd = r->start;
+ }
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "no IRQ resource defined\n");
+ ret = -ENXIO;
+ goto fail_disable_clk;
+ }
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ info->mmio_base = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(info->mmio_base)) {
+ ret = PTR_ERR(info->mmio_base);
+ goto fail_disable_clk;
+ }
+ info->mmio_phys = r->start;
+
+ /* Allocate a buffer to allow flash detection */
+ info->buf_size = INIT_BUFFER_SIZE;
+ info->data_buff = kmalloc(info->buf_size, GFP_KERNEL);
+ if (info->data_buff == NULL) {
+ ret = -ENOMEM;
+ goto fail_disable_clk;
+ }
+
+ /* initialize all interrupts to be disabled */
+ disable_int(info, NDSR_MASK);
+
+ ret = request_threaded_irq(irq, pxa3xx_nand_irq,
+ pxa3xx_nand_irq_thread, IRQF_ONESHOT,
+ pdev->name, info);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to request IRQ\n");
+ goto fail_free_buf;
+ }
+
+ platform_set_drvdata(pdev, info);
+
+ return 0;
+
+fail_free_buf:
+ free_irq(irq, info);
+ kfree(info->data_buff);
+fail_disable_clk:
+ clk_disable_unprepare(info->clk);
+ return ret;
+}
+
+static int pxa3xx_nand_remove(struct platform_device *pdev)
+{
+ struct pxa3xx_nand_info *info = platform_get_drvdata(pdev);
+ struct pxa3xx_nand_platform_data *pdata;
+ int irq, cs;
+
+ if (!info)
+ return 0;
+
+ pdata = dev_get_platdata(&pdev->dev);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq >= 0)
+ free_irq(irq, info);
+ pxa3xx_nand_free_buff(info);
+
+ clk_disable_unprepare(info->clk);
+
+ for (cs = 0; cs < pdata->num_cs; cs++)
+ nand_release(info->host[cs]->mtd);
+ return 0;
+}
+
+static int pxa3xx_nand_probe_dt(struct platform_device *pdev)
+{
+ struct pxa3xx_nand_platform_data *pdata;
+ struct device_node *np = pdev->dev.of_node;
+ const struct of_device_id *of_id =
+ of_match_device(pxa3xx_nand_dt_ids, &pdev->dev);
+
+ if (!of_id)
+ return 0;
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ if (of_get_property(np, "marvell,nand-enable-arbiter", NULL))
+ pdata->enable_arbiter = 1;
+ if (of_get_property(np, "marvell,nand-keep-config", NULL))
+ pdata->keep_config = 1;
+ of_property_read_u32(np, "num-cs", &pdata->num_cs);
+ pdata->flash_bbt = of_get_nand_on_flash_bbt(np);
+
+ pdata->ecc_strength = of_get_nand_ecc_strength(np);
+ if (pdata->ecc_strength < 0)
+ pdata->ecc_strength = 0;
+
+ pdata->ecc_step_size = of_get_nand_ecc_step_size(np);
+ if (pdata->ecc_step_size < 0)
+ pdata->ecc_step_size = 0;
+
+ pdev->dev.platform_data = pdata;
+
+ return 0;
+}
+
+static int pxa3xx_nand_probe(struct platform_device *pdev)
+{
+ struct pxa3xx_nand_platform_data *pdata;
+ struct mtd_part_parser_data ppdata = {};
+ struct pxa3xx_nand_info *info;
+ int ret, cs, probe_success;
+
+#ifndef ARCH_HAS_DMA
+ if (use_dma) {
+ use_dma = 0;
+ dev_warn(&pdev->dev,
+ "This platform can't do DMA on this device\n");
+ }
+#endif
+ ret = pxa3xx_nand_probe_dt(pdev);
+ if (ret)
+ return ret;
+
+ pdata = dev_get_platdata(&pdev->dev);
+ if (!pdata) {
+ dev_err(&pdev->dev, "no platform data defined\n");
+ return -ENODEV;
+ }
+
+ ret = alloc_nand_resource(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "alloc nand resource failed\n");
+ return ret;
+ }
+
+ info = platform_get_drvdata(pdev);
+ probe_success = 0;
+ for (cs = 0; cs < pdata->num_cs; cs++) {
+ struct mtd_info *mtd = info->host[cs]->mtd;
+
+ /*
+ * The mtd name matches the one used in 'mtdparts' kernel
+ * parameter. This name cannot be changed or otherwise
+ * user's mtd partitions configuration would get broken.
+ */
+ mtd->name = "pxa3xx_nand-0";
+ info->cs = cs;
+ ret = pxa3xx_nand_scan(mtd);
+ if (ret) {
+ dev_warn(&pdev->dev, "failed to scan nand at cs %d\n",
+ cs);
+ continue;
+ }
+
+ ppdata.of_node = pdev->dev.of_node;
+ ret = mtd_device_parse_register(mtd, NULL,
+ &ppdata, pdata->parts[cs],
+ pdata->nr_parts[cs]);
+ if (!ret)
+ probe_success = 1;
+ }
+
+ if (!probe_success) {
+ pxa3xx_nand_remove(pdev);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int pxa3xx_nand_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct pxa3xx_nand_info *info = platform_get_drvdata(pdev);
+ struct pxa3xx_nand_platform_data *pdata;
+ struct mtd_info *mtd;
+ int cs;
+
+ pdata = dev_get_platdata(&pdev->dev);
+ if (info->state) {
+ dev_err(&pdev->dev, "driver busy, state = %d\n", info->state);
+ return -EAGAIN;
+ }
+
+ for (cs = 0; cs < pdata->num_cs; cs++) {
+ mtd = info->host[cs]->mtd;
+ mtd_suspend(mtd);
+ }
+
+ return 0;
+}
+
+static int pxa3xx_nand_resume(struct platform_device *pdev)
+{
+ struct pxa3xx_nand_info *info = platform_get_drvdata(pdev);
+ struct pxa3xx_nand_platform_data *pdata;
+ struct mtd_info *mtd;
+ int cs;
+
+ pdata = dev_get_platdata(&pdev->dev);
+ /* We don't want to handle interrupt without calling mtd routine */
+ disable_int(info, NDCR_INT_MASK);
+
+ /*
+ * Directly set the chip select to a invalid value,
+ * then the driver would reset the timing according
+ * to current chip select at the beginning of cmdfunc
+ */
+ info->cs = 0xff;
+
+ /*
+ * As the spec says, the NDSR would be updated to 0x1800 when
+ * doing the nand_clk disable/enable.
+ * To prevent it damaging state machine of the driver, clear
+ * all status before resume
+ */
+ nand_writel(info, NDSR, NDSR_MASK);
+ for (cs = 0; cs < pdata->num_cs; cs++) {
+ mtd = info->host[cs]->mtd;
+ mtd_resume(mtd);
+ }
+
+ return 0;
+}
+#else
+#define pxa3xx_nand_suspend NULL
+#define pxa3xx_nand_resume NULL
+#endif
+
+static struct platform_driver pxa3xx_nand_driver = {
+ .driver = {
+ .name = "pxa3xx-nand",
+ .of_match_table = pxa3xx_nand_dt_ids,
+ },
+ .probe = pxa3xx_nand_probe,
+ .remove = pxa3xx_nand_remove,
+ .suspend = pxa3xx_nand_suspend,
+ .resume = pxa3xx_nand_resume,
+};
+
+module_platform_driver(pxa3xx_nand_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PXA3xx NAND controller driver");