diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/raw/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/marvell_nand.c | 3 | ||||
| -rw-r--r-- | drivers/mtd/nand/raw/pxa3xx_nand.c | 2103 |
4 files changed, 1 insertions, 2117 deletions
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index e6b8c59f2c0d..2c6ecb7ae753 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -313,17 +313,6 @@ config MTD_NAND_ATMEL Enables support for NAND Flash / Smart Media Card interface on Atmel AT91 processors. -config MTD_NAND_PXA3xx - tristate "NAND support on PXA3xx and Armada 370/XP" - depends on !MTD_NAND_MARVELL - depends on PXA3xx || ARCH_MMP || PLAT_ORION || ARCH_MVEBU - help - - This enables the driver for the NAND flash device found on - PXA3xx processors (NFCv1) and also on 32-bit Armada - platforms (XP, 370, 375, 38x, 39x) and 64-bit Armada - platforms (7K, 8K) (NFCv2). - config MTD_NAND_MARVELL tristate "NAND controller support on Marvell boards" depends on PXA3xx || ARCH_MMP || PLAT_ORION || ARCH_MVEBU || \ diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile index 4e0982476267..f16f59a197a3 100644 --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -28,7 +28,6 @@ omap2_nand-objs := omap2.o obj-$(CONFIG_MTD_NAND_OMAP2) += omap2_nand.o obj-$(CONFIG_MTD_NAND_OMAP_BCH_BUILD) += omap_elm.o obj-$(CONFIG_MTD_NAND_CM_X270) += cmx270_nand.o -obj-$(CONFIG_MTD_NAND_PXA3xx) += pxa3xx_nand.o obj-$(CONFIG_MTD_NAND_MARVELL) += marvell_nand.o obj-$(CONFIG_MTD_NAND_TMIO) += tmio_nand.o obj-$(CONFIG_MTD_NAND_PLATFORM) += plat_nand.o diff --git a/drivers/mtd/nand/raw/marvell_nand.c b/drivers/mtd/nand/raw/marvell_nand.c index cc21f9633edd..528a8e0342bd 100644 --- a/drivers/mtd/nand/raw/marvell_nand.c +++ b/drivers/mtd/nand/raw/marvell_nand.c @@ -2539,8 +2539,7 @@ static int marvell_nand_chip_init(struct device *dev, struct marvell_nfc *nfc, if (pdata) /* Legacy bindings support only one chip */ - ret = mtd_device_register(mtd, pdata->parts[0], - pdata->nr_parts[0]); + ret = mtd_device_register(mtd, pdata->parts, pdata->nr_parts); else ret = mtd_device_register(mtd, NULL, 0); if (ret) { diff --git a/drivers/mtd/nand/raw/pxa3xx_nand.c b/drivers/mtd/nand/raw/pxa3xx_nand.c deleted file mode 100644 index d75f30263d21..000000000000 --- a/drivers/mtd/nand/raw/pxa3xx_nand.c +++ /dev/null @@ -1,2103 +0,0 @@ -/* - * 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/dmaengine.h> -#include <linux/dma-mapping.h> -#include <linux/dma/pxa-dma.h> -#include <linux/delay.h> -#include <linux/clk.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/rawnand.h> -#include <linux/mtd/partitions.h> -#include <linux/io.h> -#include <linux/iopoll.h> -#include <linux/irq.h> -#include <linux/slab.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/platform_data/mtd-nand-pxa3xx.h> -#include <linux/mfd/syscon.h> -#include <linux/regmap.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. - * ONFI param page is 256 bytes, and there are three redundant copies - * to be read. JEDEC param page is 512 bytes, and there are also three - * redundant copies to be read. - * Hence this buffer should be at least 512 x 3. Let's pick 2048. - */ -#define INIT_BUFFER_SIZE 2048 - -/* System control register and bit to enable NAND on some SoCs */ -#define GENCONF_SOC_DEVICE_MUX 0x208 -#define GENCONF_SOC_DEVICE_MUX_NFC_EN BIT(0) - -/* 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 NFCV1_NDCR_ARB_CNTL (0x1 << 19) -#define NFCV2_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 */ - -/* - * This should be large enough to read 'ONFI' and 'JEDEC'. - * Let's use 7 bytes, which is the maximum ID count supported - * by the controller (see NDCR_RD_ID_CNT_MASK). - */ -#define READ_ID_BYTES 7 - -/* macros for registers read/write */ -#define nand_writel(info, off, val) \ - do { \ - dev_vdbg(&info->pdev->dev, \ - "%s():%d nand_writel(0x%x, 0x%04x)\n", \ - __func__, __LINE__, (val), (off)); \ - writel_relaxed((val), (info)->mmio_base + (off)); \ - } while (0) - -#define nand_readl(info, off) \ - ({ \ - unsigned int _v; \ - _v = readl_relaxed((info)->mmio_base + (off)); \ - dev_vdbg(&info->pdev->dev, \ - "%s():%d nand_readl(0x%04x) = 0x%x\n", \ - __func__, __LINE__, (off), _v); \ - _v; \ - }) - -/* 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, - PXA3XX_NAND_VARIANT_ARMADA_8K, -}; - -struct pxa3xx_nand_host { - struct nand_chip chip; - 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; -}; - -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 */ - struct scatterlist sg; - enum dma_data_direction dma_dir; - struct dma_chan *dma_chan; - dma_cookie_t dma_cookie; - int drcmr_dat; - - unsigned char *data_buff; - unsigned char *oob_buff; - dma_addr_t data_buff_phys; - int data_dma_ch; - - 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; - - /* Amount of real data per full chunk */ - unsigned int chunk_size; - - /* Amount of spare data per full chunk */ - unsigned int spare_size; - - /* Number of full chunks (i.e chunk_size + spare_size) */ - unsigned int nfullchunks; - - /* - * Total number of chunks. If equal to nfullchunks, then there - * are only full chunks. Otherwise, there is one last chunk of - * size (last_chunk_size + last_spare_size) - */ - unsigned int ntotalchunks; - - /* Amount of real data in the last chunk */ - unsigned int last_chunk_size; - - /* Amount of spare data in the last chunk */ - unsigned int last_spare_size; - - unsigned int ecc_size; - unsigned int ecc_err_cnt; - unsigned int max_bitflips; - int retcode; - - /* - * Variables only valid during command - * execution. step_chunk_size and step_spare_size is the - * amount of real data and spare data in the current - * chunk. cur_chunk is the current chunk being - * read/programmed. - */ - unsigned int step_chunk_size; - unsigned int step_spare_size; - unsigned int cur_chunk; - - /* 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"); - -struct pxa3xx_nand_timing { - unsigned int tCH; /* Enable signal hold time */ - unsigned int tCS; /* Enable signal setup time */ - unsigned int tWH; /* ND_nWE high duration */ - unsigned int tWP; /* ND_nWE pulse time */ - unsigned int tRH; /* ND_nRE high duration */ - unsigned int tRP; /* ND_nRE pulse width */ - unsigned int tR; /* ND_nWE high to ND_nRE low for read */ - unsigned int tWHR; /* ND_nWE high to ND_nRE low for status read */ - unsigned int tAR; /* ND_ALE low to ND_nRE low delay */ -}; - -struct pxa3xx_nand_flash { - uint32_t chip_id; - unsigned int flash_width; /* Width of Flash memory (DWIDTH_M) */ - unsigned int dfc_width; /* Width of flash controller(DWIDTH_C) */ - struct pxa3xx_nand_timing *timing; /* NAND Flash timing */ -}; - -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[] = { - { 0x46ec, 16, 16, &timing[1] }, - { 0xdaec, 8, 8, &timing[1] }, - { 0xd7ec, 8, 8, &timing[1] }, - { 0xa12c, 8, 8, &timing[2] }, - { 0xb12c, 16, 16, &timing[2] }, - { 0xdc2c, 8, 8, &timing[2] }, - { 0xcc2c, 16, 16, &timing[2] }, - { 0xba20, 16, 16, &timing[3] }, -}; - -static int pxa3xx_ooblayout_ecc(struct mtd_info *mtd, int section, - struct mtd_oob_region *oobregion) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - struct pxa3xx_nand_host *host = nand_get_controller_data(chip); - struct pxa3xx_nand_info *info = host->info_data; - int nchunks = mtd->writesize / info->chunk_size; - - if (section >= nchunks) - return -ERANGE; - - oobregion->offset = ((info->ecc_size + info->spare_size) * section) + - info->spare_size; - oobregion->length = info->ecc_size; - - return 0; -} - -static int pxa3xx_ooblayout_free(struct mtd_info *mtd, int section, - struct mtd_oob_region *oobregion) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - struct pxa3xx_nand_host *host = nand_get_controller_data(chip); - struct pxa3xx_nand_info *info = host->info_data; - int nchunks = mtd->writesize / info->chunk_size; - - if (section >= nchunks) - return -ERANGE; - - if (!info->spare_size) - return 0; - - oobregion->offset = section * (info->ecc_size + info->spare_size); - oobregion->length = info->spare_size; - if (!section) { - /* - * Bootrom looks in bytes 0 & 5 for bad blocks for the - * 4KB page / 4bit BCH combination. - */ - if (mtd->writesize == 4096 && info->chunk_size == 2048) { - oobregion->offset += 6; - oobregion->length -= 6; - } else { - oobregion->offset += 2; - oobregion->length -= 2; - } - } - - return 0; -} - -static const struct mtd_ooblayout_ops pxa3xx_ooblayout_ops = { - .ecc = pxa3xx_ooblayout_ecc, - .free = pxa3xx_ooblayout_free, -}; - -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 -}; - -#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, - }, - { - .compatible = "marvell,armada-8k-nand", - .data = (void *)PXA3XX_NAND_VARIANT_ARMADA_8K, - }, - {} -}; -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); -} - -static void pxa3xx_nand_set_sdr_timing(struct pxa3xx_nand_host *host, - const struct nand_sdr_timings *t) -{ - struct pxa3xx_nand_info *info = host->info_data; - struct nand_chip *chip = &host->chip; - unsigned long nand_clk = clk_get_rate(info->clk); - uint32_t ndtr0, ndtr1; - - u32 tCH_min = DIV_ROUND_UP(t->tCH_min, 1000); - u32 tCS_min = DIV_ROUND_UP(t->tCS_min, 1000); - u32 tWH_min = DIV_ROUND_UP(t->tWH_min, 1000); - u32 tWP_min = DIV_ROUND_UP(t->tWC_min - t->tWH_min, 1000); - u32 tREH_min = DIV_ROUND_UP(t->tREH_min, 1000); - u32 tRP_min = DIV_ROUND_UP(t->tRC_min - t->tREH_min, 1000); - u32 tR = chip->chip_delay * 1000; - u32 tWHR_min = DIV_ROUND_UP(t->tWHR_min, 1000); - u32 tAR_min = DIV_ROUND_UP(t->tAR_min, 1000); - - /* fallback to a default value if tR = 0 */ - if (!tR) - tR = 20000; - - ndtr0 = NDTR0_tCH(ns2cycle(tCH_min, nand_clk)) | - NDTR0_tCS(ns2cycle(tCS_min, nand_clk)) | - NDTR0_tWH(ns2cycle(tWH_min, nand_clk)) | - NDTR0_tWP(ns2cycle(tWP_min, nand_clk)) | - NDTR0_tRH(ns2cycle(tREH_min, nand_clk)) | - NDTR0_tRP(ns2cycle(tRP_min, nand_clk)); - - ndtr1 = NDTR1_tR(ns2cycle(tR, nand_clk)) | - NDTR1_tWHR(ns2cycle(tWHR_min, nand_clk)) | - NDTR1_tAR(ns2cycle(tAR_min, nand_clk)); - - info->ndtr0cs0 = ndtr0; - info->ndtr1cs0 = ndtr1; - nand_writel(info, NDTR0CS0, ndtr0); - nand_writel(info, NDTR1CS0, ndtr1); -} - -static int pxa3xx_nand_init_timings_compat(struct pxa3xx_nand_host *host, - unsigned int *flash_width, - unsigned int *dfc_width) -{ - struct nand_chip *chip = &host->chip; - struct pxa3xx_nand_info *info = host->info_data; - const struct pxa3xx_nand_flash *f = NULL; - int i, id, ntypes; - u8 idbuf[2]; - - ntypes = ARRAY_SIZE(builtin_flash_types); - - nand_readid_op(chip, 0, idbuf, sizeof(idbuf)); - id = idbuf[0] | (idbuf[1] << 8); - - for (i = 0; i < ntypes; i++) { - f = &builtin_flash_types[i]; - - if (f->chip_id == id) - break; - } - - if (i == ntypes) { - dev_err(&info->pdev->dev, "Error: timings not found\n"); - return -EINVAL; - } - - pxa3xx_nand_set_timing(host, f->timing); - - *flash_width = f->flash_width; - *dfc_width = f->dfc_width; - - return 0; -} - -static int pxa3xx_nand_init_timings_onfi(struct pxa3xx_nand_host *host, - int mode) -{ - const struct nand_sdr_timings *timings; - - mode = fls(mode) - 1; - if (mode < 0) - mode = 0; - - timings = onfi_async_timing_mode_to_sdr_timings(mode); - if (IS_ERR(timings)) - return PTR_ERR(timings); - - pxa3xx_nand_set_sdr_timing(host, timings); - - return 0; -} - -static int pxa3xx_nand_init(struct pxa3xx_nand_host *host) -{ - struct nand_chip *chip = &host->chip; - struct pxa3xx_nand_info *info = host->info_data; - unsigned int flash_width = 0, dfc_width = 0; - int mode, err; - - mode = onfi_get_async_timing_mode(chip); - if (mode == ONFI_TIMING_MODE_UNKNOWN) { - err = pxa3xx_nand_init_timings_compat(host, &flash_width, - &dfc_width); - if (err) - return err; - - if (flash_width == 16) { - info->reg_ndcr |= NDCR_DWIDTH_M; - chip->options |= NAND_BUSWIDTH_16; - } - - info->reg_ndcr |= (dfc_width == 16) ? NDCR_DWIDTH_C : 0; - } else { - err = pxa3xx_nand_init_timings_onfi(host, mode); - if (err) - return err; - } - - return 0; -} - -/** - * 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, NDSR, NDSR_MASK); - nand_writel(info, NDCR, 0); - 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); - } - if (info->dma_chan) - dmaengine_terminate_all(info->dma_chan); - - /* 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) { - u32 val; - int ret; - - /* - * 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) { - ioread32_rep(info->mmio_base + NDDB, data, 8); - - ret = readl_relaxed_poll_timeout(info->mmio_base + NDSR, val, - val & NDSR_RDDREQ, 1000, 5000); - if (ret) { - dev_err(&info->pdev->dev, - "Timeout on RDDREQ while draining the FIFO\n"); - return; - } - - data += 32; - len -= 8; - } - } - - ioread32_rep(info->mmio_base + NDDB, data, len); -} - -static void handle_data_pio(struct pxa3xx_nand_info *info) -{ - switch (info->state) { - case STATE_PIO_WRITING: - if (info->step_chunk_size) - writesl(info->mmio_base + NDDB, - info->data_buff + info->data_buff_pos, - DIV_ROUND_UP(info->step_chunk_size, 4)); - - if (info->step_spare_size) - writesl(info->mmio_base + NDDB, - info->oob_buff + info->oob_buff_pos, - DIV_ROUND_UP(info->step_spare_size, 4)); - break; - case STATE_PIO_READING: - if (info->step_chunk_size) - drain_fifo(info, - info->data_buff + info->data_buff_pos, - DIV_ROUND_UP(info->step_chunk_size, 4)); - - if (info->step_spare_size) - drain_fifo(info, - info->oob_buff + info->oob_buff_pos, - DIV_ROUND_UP(info->step_spare_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 += info->step_chunk_size; - info->oob_buff_pos += info->step_spare_size; -} - -static void pxa3xx_nand_data_dma_irq(void *data) -{ - struct pxa3xx_nand_info *info = data; - struct dma_tx_state state; - enum dma_status status; - - status = dmaengine_tx_status(info->dma_chan, info->dma_cookie, &state); - if (likely(status == DMA_COMPLETE)) { - info->state = STATE_DMA_DONE; - } else { - dev_err(&info->pdev->dev, "DMA error on data channel\n"); - info->retcode = ERR_DMABUSERR; - } - dma_unmap_sg(info->dma_chan->device->dev, &info->sg, 1, info->dma_dir); - - nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ); - enable_int(info, NDCR_INT_MASK); -} - -static void start_data_dma(struct pxa3xx_nand_info *info) -{ - enum dma_transfer_direction direction; - struct dma_async_tx_descriptor *tx; - - switch (info->state) { - case STATE_DMA_WRITING: - info->dma_dir = DMA_TO_DEVICE; - direction = DMA_MEM_TO_DEV; - break; - case STATE_DMA_READING: - info->dma_dir = DMA_FROM_DEVICE; - direction = DMA_DEV_TO_MEM; - break; - default: - dev_err(&info->pdev->dev, "%s: invalid state %d\n", __func__, - info->state); - BUG(); - } - info->sg.length = info->chunk_size; - if (info->use_spare) - info->sg.length += info->spare_size + info->ecc_size; - dma_map_sg(info->dma_chan->device->dev, &info->sg, 1, info->dma_dir); - - tx = dmaengine_prep_slave_sg(info->dma_chan, &info->sg, 1, direction, - DMA_PREP_INTERRUPT); - if (!tx) { - dev_err(&info->pdev->dev, "prep_slave_sg() failed\n"); - return; - } - tx->callback = pxa3xx_nand_data_dma_irq; - tx->callback_param = info; - info->dma_cookie = dmaengine_submit(tx); - dma_async_issue_pending(info->dma_chan); - dev_dbg(&info->pdev->dev, "%s(dir=%d cookie=%x size=%u)\n", - __func__, direction, info->dma_cookie, info->sg.length); -} - -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->variant == PXA3XX_NAND_VARIANT_ARMADA_8K) && - 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; - } - - /* - * Clear all status bit before issuing the next command, which - * can and will alter the status bits and will deserve a new - * interrupt on its own. This lets the controller exit the IRQ - */ - nand_writel(info, NDSR, status); - - if (status & 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 || - info->variant == PXA3XX_NAND_VARIANT_ARMADA_8K) - nand_writel(info, NDCB0, info->ndcb3); - } - - 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 = nand_to_mtd(&host->chip); - - /* reset data and oob column point to handle data */ - info->buf_start = 0; - info->buf_count = 0; - info->data_buff_pos = 0; - info->oob_buff_pos = 0; - info->step_chunk_size = 0; - info->step_spare_size = 0; - info->cur_chunk = 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_READOOB: - case NAND_CMD_PAGEPROG: - info->use_ecc = 1; - 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 = nand_to_mtd(&host->chip); - 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; - - if (info->cur_chunk < info->nfullchunks) { - info->step_chunk_size = info->chunk_size; - info->step_spare_size = info->spare_size; - } else { - info->step_chunk_size = info->last_chunk_size; - info->step_spare_size = info->last_spare_size; - } - - /* - * 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->step_chunk_size + - info->step_spare_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; - exec_cmd = 1; - } - break; - - case NAND_CMD_PAGEPROG: - if (is_buf_blank(info->data_buff, - (mtd->writesize + mtd->oobsize))) { - exec_cmd = 0; - break; - } - - if (info->cur_chunk < info->nfullchunks) { - info->step_chunk_size = info->chunk_size; - info->step_spare_size = info->spare_size; - } else { - info->step_chunk_size = info->last_chunk_size; - info->step_spare_size = info->last_spare_size; - } - - /* 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->step_chunk_size + - info->step_spare_size; - - /* - * This is the command dispatch that completes a chunked - * page program operation. - */ - if (info->cur_chunk == info->ntotalchunks) { - 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 = INIT_BUFFER_SIZE; - info->ndcb0 |= NDCB0_CMD_TYPE(0) - | NDCB0_ADDR_CYC(1) - | NDCB0_LEN_OVRD - | command; - info->ndcb1 = (column & 0xFF); - info->ndcb3 = INIT_BUFFER_SIZE; - info->step_chunk_size = INIT_BUFFER_SIZE; - break; - - case NAND_CMD_READID: - info->buf_count = READ_ID_BYTES; - info->ndcb0 |= NDCB0_CMD_TYPE(3) - | NDCB0_ADDR_CYC(1) - | command; - info->ndcb1 = (column & 0xFF); - - info->step_chunk_size = 8; - break; - case NAND_CMD_STATUS: - info->buf_count = 1; - info->ndcb0 |= NDCB0_CMD_TYPE(4) - | NDCB0_ADDR_CYC(1) - | command; - - info->step_chunk_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 nand_chip *chip = mtd_to_nand(mtd); - struct pxa3xx_nand_host *host = nand_get_controller_data(chip); - 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 nand_chip *chip = mtd_to_nand(mtd); - struct pxa3xx_nand_host *host = nand_get_controller_data(chip); - 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; - } - - /* Only a few commands need several steps */ - if (command != NAND_CMD_PAGEPROG && - command != NAND_CMD_READ0 && - command != NAND_CMD_READOOB) - break; - - info->cur_chunk++; - - /* Check if the sequence is complete */ - if (info->cur_chunk == info->ntotalchunks && command != NAND_CMD_PAGEPROG) - break; - - /* - * After a splitted program command sequence has issued - * the command dispatch, the command sequence is complete. - */ - if (info->cur_chunk == (info->ntotalchunks + 1) && - 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->cur_chunk == info->ntotalchunks - 1) - 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->cur_chunk == info->ntotalchunks) { - 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, - int page) -{ - nand_prog_page_begin_op(chip, page, 0, buf, mtd->writesize); - chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); - - return nand_prog_page_end_op(chip); -} - -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 = nand_get_controller_data(chip); - struct pxa3xx_nand_info *info = host->info_data; - - nand_read_page_op(chip, page, 0, 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 nand_chip *chip = mtd_to_nand(mtd); - struct pxa3xx_nand_host *host = nand_get_controller_data(chip); - 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 nand_chip *chip = mtd_to_nand(mtd); - struct pxa3xx_nand_host *host = nand_get_controller_data(chip); - 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 nand_chip *chip = mtd_to_nand(mtd); - struct pxa3xx_nand_host *host = nand_get_controller_data(chip); - 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 nand_chip *chip = mtd_to_nand(mtd); - struct pxa3xx_nand_host *host = nand_get_controller_data(chip); - 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 nand_chip *chip = mtd_to_nand(mtd); - struct pxa3xx_nand_host *host = nand_get_controller_data(chip); - 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_ident(struct pxa3xx_nand_info *info) -{ - struct pxa3xx_nand_host *host = info->host[info->cs]; - struct platform_device *pdev = info->pdev; - struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev); - const struct nand_sdr_timings *timings; - - /* Configure default flash values */ - info->chunk_size = PAGE_CHUNK_SIZE; - info->reg_ndcr = 0x0; /* enable all interrupts */ - info->reg_ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0; - info->reg_ndcr |= NDCR_RD_ID_CNT(READ_ID_BYTES); - info->reg_ndcr |= NDCR_SPARE_EN; - - /* use the common timing to make a try */ - timings = onfi_async_timing_mode_to_sdr_timings(0); - if (IS_ERR(timings)) - return PTR_ERR(timings); - - pxa3xx_nand_set_sdr_timing(host, timings); - return 0; -} - -static void pxa3xx_nand_config_tail(struct pxa3xx_nand_info *info) -{ - struct pxa3xx_nand_host *host = info->host[info->cs]; - struct nand_chip *chip = &host->chip; - struct mtd_info *mtd = nand_to_mtd(chip); - - info->reg_ndcr |= (host->col_addr_cycles == 2) ? NDCR_RA_START : 0; - info->reg_ndcr |= (chip->page_shift == 6) ? NDCR_PG_PER_BLK : 0; - info->reg_ndcr |= (mtd->writesize == 2048) ? NDCR_PAGE_SZ : 0; -} - -static void pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info) -{ - struct platform_device *pdev = info->pdev; - struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev); - uint32_t ndcr = nand_readl(info, NDCR); - - /* Set an initial chunk size */ - info->chunk_size = ndcr & NDCR_PAGE_SZ ? 2048 : 512; - info->reg_ndcr = ndcr & - ~(NDCR_INT_MASK | NDCR_ND_ARB_EN | NFCV1_NDCR_ARB_CNTL); - info->reg_ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0; - info->ndtr0cs0 = nand_readl(info, NDTR0CS0); - info->ndtr1cs0 = nand_readl(info, NDTR1CS0); -} - -static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info) -{ - struct platform_device *pdev = info->pdev; - struct dma_slave_config config; - dma_cap_mask_t mask; - struct pxad_param param; - int ret; - - info->data_buff = kmalloc(info->buf_size, GFP_KERNEL); - if (info->data_buff == NULL) - return -ENOMEM; - if (use_dma == 0) - return 0; - - ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); - if (ret) - return ret; - - sg_init_one(&info->sg, info->data_buff, info->buf_size); - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - param.prio = PXAD_PRIO_LOWEST; - param.drcmr = info->drcmr_dat; - info->dma_chan = dma_request_slave_channel_compat(mask, pxad_filter_fn, - ¶m, &pdev->dev, - "data"); - if (!info->dma_chan) { - dev_err(&pdev->dev, "unable to request data dma channel\n"); - return -ENODEV; - } - - memset(&config, 0, sizeof(config)); - config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - config.src_addr = info->mmio_phys + NDDB; - config.dst_addr = info->mmio_phys + NDDB; - config.src_maxburst = 32; - config.dst_maxburst = 32; - ret = dmaengine_slave_config(info->dma_chan, &config); - if (ret < 0) { - dev_err(&info->pdev->dev, - "dma channel configuration failed: %d\n", - ret); - return ret; - } - - /* - * 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) -{ - if (info->use_dma) { - dmaengine_terminate_all(info->dma_chan); - dma_release_channel(info->dma_chan); - } - kfree(info->data_buff); -} - -static int pxa_ecc_init(struct pxa3xx_nand_info *info, - struct mtd_info *mtd, - int strength, int ecc_stepsize, int page_size) -{ - struct nand_chip *chip = mtd_to_nand(mtd); - struct nand_ecc_ctrl *ecc = &chip->ecc; - - if (strength == 1 && ecc_stepsize == 512 && page_size == 2048) { - info->nfullchunks = 1; - info->ntotalchunks = 1; - 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->nfullchunks = 1; - info->ntotalchunks = 1; - 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->nfullchunks = 1; - info->ntotalchunks = 1; - info->chunk_size = 2048; - info->spare_size = 32; - info->ecc_size = 32; - ecc->mode = NAND_ECC_HW; - ecc->size = info->chunk_size; - mtd_set_ooblayout(mtd, &pxa3xx_ooblayout_ops); - ecc->strength = 16; - - } else if (strength == 4 && ecc_stepsize == 512 && page_size == 4096) { - info->ecc_bch = 1; - info->nfullchunks = 2; - info->ntotalchunks = 2; - info->chunk_size = 2048; - info->spare_size = 32; - info->ecc_size = 32; - ecc->mode = NAND_ECC_HW; - ecc->size = info->chunk_size; - mtd_set_ooblayout(mtd, &pxa3xx_ooblayout_ops); - 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->nfullchunks = 4; - info->ntotalchunks = 5; - info->chunk_size = 1024; - info->spare_size = 0; - info->last_chunk_size = 0; - info->last_spare_size = 64; - info->ecc_size = 32; - ecc->mode = NAND_ECC_HW; - ecc->size = info->chunk_size; - mtd_set_ooblayout(mtd, &pxa3xx_ooblayout_ops); - 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 nand_chip *chip = mtd_to_nand(mtd); - struct pxa3xx_nand_host *host = nand_get_controller_data(chip); - 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); - int ret; - uint16_t ecc_strength, ecc_step; - - if (pdata->keep_config) { - pxa3xx_nand_detect_config(info); - } else { - ret = pxa3xx_nand_config_ident(info); - if (ret) - return ret; - } - - 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 || - info->variant == PXA3XX_NAND_VARIANT_ARMADA_8K) - nand_writel(info, NDECCCTRL, 0x0); - - if (pdata->flash_bbt) - chip->bbt_options |= NAND_BBT_USE_FLASH; - - chip->ecc.strength = pdata->ecc_strength; - chip->ecc.size = pdata->ecc_step_size; - - ret = nand_scan_ident(mtd, 1, NULL); - if (ret) - return ret; - - if (!pdata->keep_config) { - ret = pxa3xx_nand_init(host); - if (ret) { - dev_err(&info->pdev->dev, "Failed to init nand: %d\n", - ret); - return ret; - } - } - - if (chip->bbt_options & NAND_BBT_USE_FLASH) { - /* - * 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_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 || - info->variant == PXA3XX_NAND_VARIANT_ARMADA_8K) { - chip->cmdfunc = nand_cmdfunc_extended; - } else { - dev_err(&info->pdev->dev, - "unsupported page size on this variant\n"); - return -ENODEV; - } - } - - ecc_strength = chip->ecc.strength; - ecc_step = chip->ecc.size; - if (!ecc_strength || !ecc_step) { - 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, mtd, 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; - - if (!pdata->keep_config) - pxa3xx_nand_config_tail(info); - - return nand_scan_tail(mtd); -} - -static int alloc_nand_resource(struct platform_device *pdev) -{ - struct device_node *np = pdev->dev.of_node; - 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) { - dev_err(&pdev->dev, "invalid number of chip selects\n"); - return -ENODEV; - } - - info = devm_kzalloc(&pdev->dev, - sizeof(*info) + 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++) { - host = (void *)&info[1] + sizeof(*host) * cs; - chip = &host->chip; - nand_set_controller_data(chip, host); - mtd = nand_to_mtd(chip); - info->host[cs] = host; - host->cs = cs; - host->info_data = info; - mtd->dev.parent = &pdev->dev; - /* FIXME: all chips use the same device tree partitions */ - nand_set_flash_node(chip, np); - - nand_set_controller_data(chip, host); - 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; - chip->onfi_set_features = nand_onfi_get_set_features_notsupp; - chip->onfi_get_features = nand_onfi_get_set_features_notsupp; - } - - nand_hw_control_init(chip->controller); - info->clk = devm_clk_get(&pdev->dev, NULL); - if (IS_ERR(info->clk)) { - ret = PTR_ERR(info->clk); - dev_err(&pdev->dev, "failed to get nand clock: %d\n", ret); - return ret; - } - ret = clk_prepare_enable(info->clk); - if (ret < 0) - return ret; - - if (!np && use_dma) { - 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; - } - - 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); - dev_err(&pdev->dev, "failed to map register space: %d\n", ret); - 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: %d\n", ret); - 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); - - /* - * In the pxa3xx case, the DFI bus is shared between the SMC and NFC. - * In order to prevent a lockup of the system bus, the DFI bus - * arbitration is granted to SMC upon driver removal. This is done by - * setting the x_ARB_CNTL bit, which also prevents the NAND to have - * access to the bus anymore. - */ - nand_writel(info, NDCR, - (nand_readl(info, NDCR) & ~NDCR_ND_ARB_EN) | - NFCV1_NDCR_ARB_CNTL); - clk_disable_unprepare(info->clk); - - for (cs = 0; cs < pdata->num_cs; cs++) - nand_release(nand_to_mtd(&info->host[cs]->chip)); - 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; - - /* - * Some SoCs like A7k/A8k need to enable manually the NAND - * controller to avoid being bootloader dependent. This is done - * through the use of a single bit in the System Functions registers. - */ - if (pxa3xx_nand_get_variant(pdev) == PXA3XX_NAND_VARIANT_ARMADA_8K) { - struct regmap *sysctrl_base = syscon_regmap_lookup_by_phandle( - pdev->dev.of_node, "marvell,system-controller"); - u32 reg; - - if (IS_ERR(sysctrl_base)) - return PTR_ERR(sysctrl_base); - - regmap_read(sysctrl_base, GENCONF_SOC_DEVICE_MUX, ®); - reg |= GENCONF_SOC_DEVICE_MUX_NFC_EN; - regmap_write(sysctrl_base, GENCONF_SOC_DEVICE_MUX, reg); - } - - 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); - - pdev->dev.platform_data = pdata; - - return 0; -} - -static int pxa3xx_nand_probe(struct platform_device *pdev) -{ - struct pxa3xx_nand_platform_data *pdata; - struct pxa3xx_nand_info *info; - int ret, cs, probe_success, dma_available; - - dma_available = IS_ENABLED(CONFIG_ARM) && - (IS_ENABLED(CONFIG_ARCH_PXA) || IS_ENABLED(CONFIG_ARCH_MMP)); - if (use_dma && !dma_available) { - use_dma = 0; - dev_warn(&pdev->dev, - "This platform can't do DMA on this device\n"); - } - - 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) - return ret; - - info = platform_get_drvdata(pdev); - probe_success = 0; - for (cs = 0; cs < pdata->num_cs; cs++) { - struct mtd_info *mtd = nand_to_mtd(&info->host[cs]->chip); - - /* - * 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; - } - - ret = mtd_device_register(mtd, 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 device *dev) -{ - struct pxa3xx_nand_info *info = dev_get_drvdata(dev); - - if (info->state) { - dev_err(dev, "driver busy, state = %d\n", info->state); - return -EAGAIN; - } - - clk_disable(info->clk); - return 0; -} - -static int pxa3xx_nand_resume(struct device *dev) -{ - struct pxa3xx_nand_info *info = dev_get_drvdata(dev); - int ret; - - ret = clk_enable(info->clk); - if (ret < 0) - return ret; - - /* 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); - - return 0; -} -#else -#define pxa3xx_nand_suspend NULL -#define pxa3xx_nand_resume NULL -#endif - -static const struct dev_pm_ops pxa3xx_nand_pm_ops = { - .suspend = pxa3xx_nand_suspend, - .resume = pxa3xx_nand_resume, -}; - -static struct platform_driver pxa3xx_nand_driver = { - .driver = { - .name = "pxa3xx-nand", - .of_match_table = pxa3xx_nand_dt_ids, - .pm = &pxa3xx_nand_pm_ops, - }, - .probe = pxa3xx_nand_probe, - .remove = pxa3xx_nand_remove, -}; - -module_platform_driver(pxa3xx_nand_driver); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("PXA3xx NAND controller driver"); |