On Wed, 14 Mar 2018 17:30:23 +0100 Arnd Bergmann <a...@arndb.de> wrote:
> The blackfin architecture is getting removed, so this driver has > become obsolete. > Applied to nand/next. Thanks, Boris > Signed-off-by: Arnd Bergmann <a...@arndb.de> > --- > drivers/mtd/nand/raw/Kconfig | 32 -- > drivers/mtd/nand/raw/Makefile | 1 - > drivers/mtd/nand/raw/bf5xx_nand.c | 861 > -------------------------------------- > 3 files changed, 894 deletions(-) > delete mode 100644 drivers/mtd/nand/raw/bf5xx_nand.c > > diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig > index 605ec8cce67b..0f2b6f348a0a 100644 > --- a/drivers/mtd/nand/raw/Kconfig > +++ b/drivers/mtd/nand/raw/Kconfig > @@ -116,38 +116,6 @@ config MTD_NAND_AU1550 > This enables the driver for the NAND flash controller on the > AMD/Alchemy 1550 SOC. > > -config MTD_NAND_BF5XX > - tristate "Blackfin on-chip NAND Flash Controller driver" > - depends on BF54x || BF52x > - help > - This enables the Blackfin on-chip NAND flash controller > - > - No board specific support is done by this driver, each board > - must advertise a platform_device for the driver to attach. > - > - This driver can also be built as a module. If so, the module > - will be called bf5xx-nand. > - > -config MTD_NAND_BF5XX_HWECC > - bool "BF5XX NAND Hardware ECC" > - default y > - depends on MTD_NAND_BF5XX > - help > - Enable the use of the BF5XX's internal ECC generator when > - using NAND. > - > -config MTD_NAND_BF5XX_BOOTROM_ECC > - bool "Use Blackfin BootROM ECC Layout" > - default n > - depends on MTD_NAND_BF5XX_HWECC > - help > - If you wish to modify NAND pages and allow the Blackfin on-chip > - BootROM to boot from them, say Y here. This is only necessary > - if you are booting U-Boot out of NAND and you wish to update > - U-Boot from Linux' userspace. Otherwise, you should say N here. > - > - If unsure, say N. > - > config MTD_NAND_S3C2410 > tristate "NAND Flash support for Samsung S3C SoCs" > depends on ARCH_S3C24XX || ARCH_S3C64XX > diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile > index f16f59a197a3..165b7ef9e9a1 100644 > --- a/drivers/mtd/nand/raw/Makefile > +++ b/drivers/mtd/nand/raw/Makefile > @@ -11,7 +11,6 @@ obj-$(CONFIG_MTD_NAND_DENALI) += denali.o > obj-$(CONFIG_MTD_NAND_DENALI_PCI) += denali_pci.o > obj-$(CONFIG_MTD_NAND_DENALI_DT) += denali_dt.o > obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o > -obj-$(CONFIG_MTD_NAND_BF5XX) += bf5xx_nand.o > obj-$(CONFIG_MTD_NAND_S3C2410) += s3c2410.o > obj-$(CONFIG_MTD_NAND_TANGO) += tango_nand.o > obj-$(CONFIG_MTD_NAND_DAVINCI) += davinci_nand.o > diff --git a/drivers/mtd/nand/raw/bf5xx_nand.c > b/drivers/mtd/nand/raw/bf5xx_nand.c > deleted file mode 100644 > index 9a1d8d104570..000000000000 > --- a/drivers/mtd/nand/raw/bf5xx_nand.c > +++ /dev/null > @@ -1,861 +0,0 @@ > -/* > - * Copyright 2006-2008 Analog Devices Inc. > - * http://blackfin.uclinux.org/ > - * Bryan Wu <bryan...@analog.com> > - * > - * Blackfin BF5xx on-chip NAND flash controller driver > - * > - * Derived from s3c2410.c > - * Copyright (c) 2007 Ben Dooks <b...@simtec.co.uk> > - * > - * Derived from cafe.c > - * Copyright © 2006 Red Hat, Inc. > - * Copyright © 2006 David Woodhouse <dw...@infradead.org> > - * > - * Changelog: > - * 12-Jun-2007 Bryan Wu: Initial version > - * 18-Jul-2007 Bryan Wu: > - * - ECC_HW and ECC_SW supported > - * - DMA supported in ECC_HW > - * - YAFFS tested as rootfs in both ECC_HW and ECC_SW > - * > - * This program is free software; you can redistribute it and/or modify > - * it under the terms of the GNU General Public License as published by > - * the Free Software Foundation; either version 2 of the License, or > - * (at your option) any later version. > - * > - * This program is distributed in the hope that it will be useful, > - * but WITHOUT ANY WARRANTY; without even the implied warranty of > - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > - * GNU General Public License for more details. > - * > - * You should have received a copy of the GNU General Public License > - * along with this program; if not, write to the Free Software > - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA > -*/ > - > -#include <linux/module.h> > -#include <linux/types.h> > -#include <linux/kernel.h> > -#include <linux/string.h> > -#include <linux/ioport.h> > -#include <linux/platform_device.h> > -#include <linux/delay.h> > -#include <linux/dma-mapping.h> > -#include <linux/err.h> > -#include <linux/slab.h> > -#include <linux/io.h> > -#include <linux/bitops.h> > - > -#include <linux/mtd/mtd.h> > -#include <linux/mtd/rawnand.h> > -#include <linux/mtd/nand_ecc.h> > -#include <linux/mtd/partitions.h> > - > -#include <asm/blackfin.h> > -#include <asm/dma.h> > -#include <asm/cacheflush.h> > -#include <asm/nand.h> > -#include <asm/portmux.h> > - > -#define DRV_NAME "bf5xx-nand" > -#define DRV_VERSION "1.2" > -#define DRV_AUTHOR "Bryan Wu <bryan...@analog.com>" > -#define DRV_DESC "BF5xx on-chip NAND FLash Controller Driver" > - > -/* NFC_STAT Masks */ > -#define NBUSY 0x01 /* Not Busy */ > -#define WB_FULL 0x02 /* Write Buffer Full */ > -#define PG_WR_STAT 0x04 /* Page Write Pending */ > -#define PG_RD_STAT 0x08 /* Page Read Pending */ > -#define WB_EMPTY 0x10 /* Write Buffer Empty */ > - > -/* NFC_IRQSTAT Masks */ > -#define NBUSYIRQ 0x01 /* Not Busy IRQ */ > -#define WB_OVF 0x02 /* Write Buffer Overflow */ > -#define WB_EDGE 0x04 /* Write Buffer Edge Detect */ > -#define RD_RDY 0x08 /* Read Data Ready */ > -#define WR_DONE 0x10 /* Page Write Done */ > - > -/* NFC_RST Masks */ > -#define ECC_RST 0x01 /* ECC (and NFC counters) Reset */ > - > -/* NFC_PGCTL Masks */ > -#define PG_RD_START 0x01 /* Page Read Start */ > -#define PG_WR_START 0x02 /* Page Write Start */ > - > -#ifdef CONFIG_MTD_NAND_BF5XX_HWECC > -static int hardware_ecc = 1; > -#else > -static int hardware_ecc; > -#endif > - > -static const unsigned short bfin_nfc_pin_req[] = > - {P_NAND_CE, > - P_NAND_RB, > - P_NAND_D0, > - P_NAND_D1, > - P_NAND_D2, > - P_NAND_D3, > - P_NAND_D4, > - P_NAND_D5, > - P_NAND_D6, > - P_NAND_D7, > - P_NAND_WE, > - P_NAND_RE, > - P_NAND_CLE, > - P_NAND_ALE, > - 0}; > - > -#ifdef CONFIG_MTD_NAND_BF5XX_BOOTROM_ECC > -static int bootrom_ooblayout_ecc(struct mtd_info *mtd, int section, > - struct mtd_oob_region *oobregion) > -{ > - if (section > 7) > - return -ERANGE; > - > - oobregion->offset = section * 8; > - oobregion->length = 3; > - > - return 0; > -} > - > -static int bootrom_ooblayout_free(struct mtd_info *mtd, int section, > - struct mtd_oob_region *oobregion) > -{ > - if (section > 7) > - return -ERANGE; > - > - oobregion->offset = (section * 8) + 3; > - oobregion->length = 5; > - > - return 0; > -} > - > -static const struct mtd_ooblayout_ops bootrom_ooblayout_ops = { > - .ecc = bootrom_ooblayout_ecc, > - .free = bootrom_ooblayout_free, > -}; > -#endif > - > -/* > - * Data structures for bf5xx nand flash controller driver > - */ > - > -/* bf5xx nand info */ > -struct bf5xx_nand_info { > - /* mtd info */ > - struct nand_hw_control controller; > - struct nand_chip chip; > - > - /* platform info */ > - struct bf5xx_nand_platform *platform; > - > - /* device info */ > - struct device *device; > - > - /* DMA stuff */ > - struct completion dma_completion; > -}; > - > -/* > - * Conversion functions > - */ > -static struct bf5xx_nand_info *mtd_to_nand_info(struct mtd_info *mtd) > -{ > - return container_of(mtd_to_nand(mtd), struct bf5xx_nand_info, > - chip); > -} > - > -static struct bf5xx_nand_info *to_nand_info(struct platform_device *pdev) > -{ > - return platform_get_drvdata(pdev); > -} > - > -static struct bf5xx_nand_platform *to_nand_plat(struct platform_device *pdev) > -{ > - return dev_get_platdata(&pdev->dev); > -} > - > -/* > - * struct nand_chip interface function pointers > - */ > - > -/* > - * bf5xx_nand_hwcontrol > - * > - * Issue command and address cycles to the chip > - */ > -static void bf5xx_nand_hwcontrol(struct mtd_info *mtd, int cmd, > - unsigned int ctrl) > -{ > - if (cmd == NAND_CMD_NONE) > - return; > - > - while (bfin_read_NFC_STAT() & WB_FULL) > - cpu_relax(); > - > - if (ctrl & NAND_CLE) > - bfin_write_NFC_CMD(cmd); > - else if (ctrl & NAND_ALE) > - bfin_write_NFC_ADDR(cmd); > - SSYNC(); > -} > - > -/* > - * bf5xx_nand_devready() > - * > - * returns 0 if the nand is busy, 1 if it is ready > - */ > -static int bf5xx_nand_devready(struct mtd_info *mtd) > -{ > - unsigned short val = bfin_read_NFC_STAT(); > - > - if ((val & NBUSY) == NBUSY) > - return 1; > - else > - return 0; > -} > - > -/* > - * ECC functions > - * These allow the bf5xx to use the controller's ECC > - * generator block to ECC the data as it passes through > - */ > - > -/* > - * ECC error correction function > - */ > -static int bf5xx_nand_correct_data_256(struct mtd_info *mtd, u_char *dat, > - u_char *read_ecc, u_char *calc_ecc) > -{ > - struct bf5xx_nand_info *info = mtd_to_nand_info(mtd); > - u32 syndrome[5]; > - u32 calced, stored; > - int i; > - unsigned short failing_bit, failing_byte; > - u_char data; > - > - calced = calc_ecc[0] | (calc_ecc[1] << 8) | (calc_ecc[2] << 16); > - stored = read_ecc[0] | (read_ecc[1] << 8) | (read_ecc[2] << 16); > - > - syndrome[0] = (calced ^ stored); > - > - /* > - * syndrome 0: all zero > - * No error in data > - * No action > - */ > - if (!syndrome[0] || !calced || !stored) > - return 0; > - > - /* > - * sysdrome 0: only one bit is one > - * ECC data was incorrect > - * No action > - */ > - if (hweight32(syndrome[0]) == 1) { > - dev_err(info->device, "ECC data was incorrect!\n"); > - return -EBADMSG; > - } > - > - syndrome[1] = (calced & 0x7FF) ^ (stored & 0x7FF); > - syndrome[2] = (calced & 0x7FF) ^ ((calced >> 11) & 0x7FF); > - syndrome[3] = (stored & 0x7FF) ^ ((stored >> 11) & 0x7FF); > - syndrome[4] = syndrome[2] ^ syndrome[3]; > - > - for (i = 0; i < 5; i++) > - dev_info(info->device, "syndrome[%d] 0x%08x\n", i, syndrome[i]); > - > - dev_info(info->device, > - "calced[0x%08x], stored[0x%08x]\n", > - calced, stored); > - > - /* > - * sysdrome 0: exactly 11 bits are one, each parity > - * and parity' pair is 1 & 0 or 0 & 1. > - * 1-bit correctable error > - * Correct the error > - */ > - if (hweight32(syndrome[0]) == 11 && syndrome[4] == 0x7FF) { > - dev_info(info->device, > - "1-bit correctable error, correct it.\n"); > - dev_info(info->device, > - "syndrome[1] 0x%08x\n", syndrome[1]); > - > - failing_bit = syndrome[1] & 0x7; > - failing_byte = syndrome[1] >> 0x3; > - data = *(dat + failing_byte); > - data = data ^ (0x1 << failing_bit); > - *(dat + failing_byte) = data; > - > - return 1; > - } > - > - /* > - * sysdrome 0: random data > - * More than 1-bit error, non-correctable error > - * Discard data, mark bad block > - */ > - dev_err(info->device, > - "More than 1-bit error, non-correctable error.\n"); > - dev_err(info->device, > - "Please discard data, mark bad block\n"); > - > - return -EBADMSG; > -} > - > -static int bf5xx_nand_correct_data(struct mtd_info *mtd, u_char *dat, > - u_char *read_ecc, u_char *calc_ecc) > -{ > - struct nand_chip *chip = mtd_to_nand(mtd); > - int ret, bitflips = 0; > - > - ret = bf5xx_nand_correct_data_256(mtd, dat, read_ecc, calc_ecc); > - if (ret < 0) > - return ret; > - > - bitflips = ret; > - > - /* If ecc size is 512, correct second 256 bytes */ > - if (chip->ecc.size == 512) { > - dat += 256; > - read_ecc += 3; > - calc_ecc += 3; > - ret = bf5xx_nand_correct_data_256(mtd, dat, read_ecc, calc_ecc); > - if (ret < 0) > - return ret; > - > - bitflips += ret; > - } > - > - return bitflips; > -} > - > -static void bf5xx_nand_enable_hwecc(struct mtd_info *mtd, int mode) > -{ > - return; > -} > - > -static int bf5xx_nand_calculate_ecc(struct mtd_info *mtd, > - const u_char *dat, u_char *ecc_code) > -{ > - struct bf5xx_nand_info *info = mtd_to_nand_info(mtd); > - struct nand_chip *chip = mtd_to_nand(mtd); > - u16 ecc0, ecc1; > - u32 code[2]; > - u8 *p; > - > - /* first 3 bytes ECC code for 256 page size */ > - ecc0 = bfin_read_NFC_ECC0(); > - ecc1 = bfin_read_NFC_ECC1(); > - > - code[0] = (ecc0 & 0x7ff) | ((ecc1 & 0x7ff) << 11); > - > - dev_dbg(info->device, "returning ecc 0x%08x\n", code[0]); > - > - p = (u8 *) code; > - memcpy(ecc_code, p, 3); > - > - /* second 3 bytes ECC code for 512 ecc size */ > - if (chip->ecc.size == 512) { > - ecc0 = bfin_read_NFC_ECC2(); > - ecc1 = bfin_read_NFC_ECC3(); > - code[1] = (ecc0 & 0x7ff) | ((ecc1 & 0x7ff) << 11); > - > - /* second 3 bytes in ecc_code for second 256 > - * bytes of 512 page size > - */ > - p = (u8 *) (code + 1); > - memcpy((ecc_code + 3), p, 3); > - dev_dbg(info->device, "returning ecc 0x%08x\n", code[1]); > - } > - > - return 0; > -} > - > -/* > - * PIO mode for buffer writing and reading > - */ > -static void bf5xx_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) > -{ > - int i; > - unsigned short val; > - > - /* > - * Data reads are requested by first writing to NFC_DATA_RD > - * and then reading back from NFC_READ. > - */ > - for (i = 0; i < len; i++) { > - while (bfin_read_NFC_STAT() & WB_FULL) > - cpu_relax(); > - > - /* Contents do not matter */ > - bfin_write_NFC_DATA_RD(0x0000); > - SSYNC(); > - > - while ((bfin_read_NFC_IRQSTAT() & RD_RDY) != RD_RDY) > - cpu_relax(); > - > - buf[i] = bfin_read_NFC_READ(); > - > - val = bfin_read_NFC_IRQSTAT(); > - val |= RD_RDY; > - bfin_write_NFC_IRQSTAT(val); > - SSYNC(); > - } > -} > - > -static uint8_t bf5xx_nand_read_byte(struct mtd_info *mtd) > -{ > - uint8_t val; > - > - bf5xx_nand_read_buf(mtd, &val, 1); > - > - return val; > -} > - > -static void bf5xx_nand_write_buf(struct mtd_info *mtd, > - const uint8_t *buf, int len) > -{ > - int i; > - > - for (i = 0; i < len; i++) { > - while (bfin_read_NFC_STAT() & WB_FULL) > - cpu_relax(); > - > - bfin_write_NFC_DATA_WR(buf[i]); > - SSYNC(); > - } > -} > - > -static void bf5xx_nand_read_buf16(struct mtd_info *mtd, uint8_t *buf, int > len) > -{ > - int i; > - u16 *p = (u16 *) buf; > - len >>= 1; > - > - /* > - * Data reads are requested by first writing to NFC_DATA_RD > - * and then reading back from NFC_READ. > - */ > - bfin_write_NFC_DATA_RD(0x5555); > - > - SSYNC(); > - > - for (i = 0; i < len; i++) > - p[i] = bfin_read_NFC_READ(); > -} > - > -static void bf5xx_nand_write_buf16(struct mtd_info *mtd, > - const uint8_t *buf, int len) > -{ > - int i; > - u16 *p = (u16 *) buf; > - len >>= 1; > - > - for (i = 0; i < len; i++) > - bfin_write_NFC_DATA_WR(p[i]); > - > - SSYNC(); > -} > - > -/* > - * DMA functions for buffer writing and reading > - */ > -static irqreturn_t bf5xx_nand_dma_irq(int irq, void *dev_id) > -{ > - struct bf5xx_nand_info *info = dev_id; > - > - clear_dma_irqstat(CH_NFC); > - disable_dma(CH_NFC); > - complete(&info->dma_completion); > - > - return IRQ_HANDLED; > -} > - > -static void bf5xx_nand_dma_rw(struct mtd_info *mtd, > - uint8_t *buf, int is_read) > -{ > - struct bf5xx_nand_info *info = mtd_to_nand_info(mtd); > - struct nand_chip *chip = mtd_to_nand(mtd); > - unsigned short val; > - > - dev_dbg(info->device, " mtd->%p, buf->%p, is_read %d\n", > - mtd, buf, is_read); > - > - /* > - * Before starting a dma transfer, be sure to invalidate/flush > - * the cache over the address range of your DMA buffer to > - * prevent cache coherency problems. Otherwise very subtle bugs > - * can be introduced to your driver. > - */ > - if (is_read) > - invalidate_dcache_range((unsigned int)buf, > - (unsigned int)(buf + chip->ecc.size)); > - else > - flush_dcache_range((unsigned int)buf, > - (unsigned int)(buf + chip->ecc.size)); > - > - /* > - * This register must be written before each page is > - * transferred to generate the correct ECC register > - * values. > - */ > - bfin_write_NFC_RST(ECC_RST); > - SSYNC(); > - while (bfin_read_NFC_RST() & ECC_RST) > - cpu_relax(); > - > - disable_dma(CH_NFC); > - clear_dma_irqstat(CH_NFC); > - > - /* setup DMA register with Blackfin DMA API */ > - set_dma_config(CH_NFC, 0x0); > - set_dma_start_addr(CH_NFC, (unsigned long) buf); > - > - /* The DMAs have different size on BF52x and BF54x */ > -#ifdef CONFIG_BF52x > - set_dma_x_count(CH_NFC, (chip->ecc.size >> 1)); > - set_dma_x_modify(CH_NFC, 2); > - val = DI_EN | WDSIZE_16; > -#endif > - > -#ifdef CONFIG_BF54x > - set_dma_x_count(CH_NFC, (chip->ecc.size >> 2)); > - set_dma_x_modify(CH_NFC, 4); > - val = DI_EN | WDSIZE_32; > -#endif > - /* setup write or read operation */ > - if (is_read) > - val |= WNR; > - set_dma_config(CH_NFC, val); > - enable_dma(CH_NFC); > - > - /* Start PAGE read/write operation */ > - if (is_read) > - bfin_write_NFC_PGCTL(PG_RD_START); > - else > - bfin_write_NFC_PGCTL(PG_WR_START); > - wait_for_completion(&info->dma_completion); > -} > - > -static void bf5xx_nand_dma_read_buf(struct mtd_info *mtd, > - uint8_t *buf, int len) > -{ > - struct bf5xx_nand_info *info = mtd_to_nand_info(mtd); > - struct nand_chip *chip = mtd_to_nand(mtd); > - > - dev_dbg(info->device, "mtd->%p, buf->%p, int %d\n", mtd, buf, len); > - > - if (len == chip->ecc.size) > - bf5xx_nand_dma_rw(mtd, buf, 1); > - else > - bf5xx_nand_read_buf(mtd, buf, len); > -} > - > -static void bf5xx_nand_dma_write_buf(struct mtd_info *mtd, > - const uint8_t *buf, int len) > -{ > - struct bf5xx_nand_info *info = mtd_to_nand_info(mtd); > - struct nand_chip *chip = mtd_to_nand(mtd); > - > - dev_dbg(info->device, "mtd->%p, buf->%p, len %d\n", mtd, buf, len); > - > - if (len == chip->ecc.size) > - bf5xx_nand_dma_rw(mtd, (uint8_t *)buf, 0); > - else > - bf5xx_nand_write_buf(mtd, buf, len); > -} > - > -static int bf5xx_nand_read_page_raw(struct mtd_info *mtd, struct nand_chip > *chip, > - uint8_t *buf, int oob_required, int page) > -{ > - nand_read_page_op(chip, page, 0, NULL, 0); > - > - bf5xx_nand_read_buf(mtd, buf, mtd->writesize); > - bf5xx_nand_read_buf(mtd, chip->oob_poi, mtd->oobsize); > - > - return 0; > -} > - > -static int bf5xx_nand_write_page_raw(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); > - bf5xx_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize); > - > - return nand_prog_page_end_op(chip); > -} > - > -/* > - * System initialization functions > - */ > -static int bf5xx_nand_dma_init(struct bf5xx_nand_info *info) > -{ > - int ret; > - > - /* Do not use dma */ > - if (!hardware_ecc) > - return 0; > - > - init_completion(&info->dma_completion); > - > - /* Request NFC DMA channel */ > - ret = request_dma(CH_NFC, "BF5XX NFC driver"); > - if (ret < 0) { > - dev_err(info->device, " unable to get DMA channel\n"); > - return ret; > - } > - > -#ifdef CONFIG_BF54x > - /* Setup DMAC1 channel mux for NFC which shared with SDH */ > - bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() & ~1); > - SSYNC(); > -#endif > - > - set_dma_callback(CH_NFC, bf5xx_nand_dma_irq, info); > - > - /* Turn off the DMA channel first */ > - disable_dma(CH_NFC); > - return 0; > -} > - > -static void bf5xx_nand_dma_remove(struct bf5xx_nand_info *info) > -{ > - /* Free NFC DMA channel */ > - if (hardware_ecc) > - free_dma(CH_NFC); > -} > - > -/* > - * BF5XX NFC hardware initialization > - * - pin mux setup > - * - clear interrupt status > - */ > -static int bf5xx_nand_hw_init(struct bf5xx_nand_info *info) > -{ > - int err = 0; > - unsigned short val; > - struct bf5xx_nand_platform *plat = info->platform; > - > - /* setup NFC_CTL register */ > - dev_info(info->device, > - "data_width=%d, wr_dly=%d, rd_dly=%d\n", > - (plat->data_width ? 16 : 8), > - plat->wr_dly, plat->rd_dly); > - > - val = (1 << NFC_PG_SIZE_OFFSET) | > - (plat->data_width << NFC_NWIDTH_OFFSET) | > - (plat->rd_dly << NFC_RDDLY_OFFSET) | > - (plat->wr_dly << NFC_WRDLY_OFFSET); > - dev_dbg(info->device, "NFC_CTL is 0x%04x\n", val); > - > - bfin_write_NFC_CTL(val); > - SSYNC(); > - > - /* clear interrupt status */ > - bfin_write_NFC_IRQMASK(0x0); > - SSYNC(); > - val = bfin_read_NFC_IRQSTAT(); > - bfin_write_NFC_IRQSTAT(val); > - SSYNC(); > - > - /* DMA initialization */ > - if (bf5xx_nand_dma_init(info)) > - err = -ENXIO; > - > - return err; > -} > - > -/* > - * Device management interface > - */ > -static int bf5xx_nand_add_partition(struct bf5xx_nand_info *info) > -{ > - struct mtd_info *mtd = nand_to_mtd(&info->chip); > - struct mtd_partition *parts = info->platform->partitions; > - int nr = info->platform->nr_partitions; > - > - return mtd_device_register(mtd, parts, nr); > -} > - > -static int bf5xx_nand_remove(struct platform_device *pdev) > -{ > - struct bf5xx_nand_info *info = to_nand_info(pdev); > - > - /* first thing we need to do is release all our mtds > - * and their partitions, then go through freeing the > - * resources used > - */ > - nand_release(nand_to_mtd(&info->chip)); > - > - peripheral_free_list(bfin_nfc_pin_req); > - bf5xx_nand_dma_remove(info); > - > - return 0; > -} > - > -static int bf5xx_nand_scan(struct mtd_info *mtd) > -{ > - struct nand_chip *chip = mtd_to_nand(mtd); > - int ret; > - > - ret = nand_scan_ident(mtd, 1, NULL); > - if (ret) > - return ret; > - > - if (hardware_ecc) { > - /* > - * for nand with page size > 512B, think it as several sections > with 512B > - */ > - if (likely(mtd->writesize >= 512)) { > - chip->ecc.size = 512; > - chip->ecc.bytes = 6; > - chip->ecc.strength = 2; > - } else { > - chip->ecc.size = 256; > - chip->ecc.bytes = 3; > - chip->ecc.strength = 1; > - bfin_write_NFC_CTL(bfin_read_NFC_CTL() & ~(1 << > NFC_PG_SIZE_OFFSET)); > - SSYNC(); > - } > - } > - > - return nand_scan_tail(mtd); > -} > - > -/* > - * bf5xx_nand_probe > - * > - * called by device layer when it finds a device matching > - * one our driver can handled. This code checks to see if > - * it can allocate all necessary resources then calls the > - * nand layer to look for devices > - */ > -static int bf5xx_nand_probe(struct platform_device *pdev) > -{ > - struct bf5xx_nand_platform *plat = to_nand_plat(pdev); > - struct bf5xx_nand_info *info = NULL; > - struct nand_chip *chip = NULL; > - struct mtd_info *mtd = NULL; > - int err = 0; > - > - dev_dbg(&pdev->dev, "(%p)\n", pdev); > - > - if (!plat) { > - dev_err(&pdev->dev, "no platform specific information\n"); > - return -EINVAL; > - } > - > - if (peripheral_request_list(bfin_nfc_pin_req, DRV_NAME)) { > - dev_err(&pdev->dev, "requesting Peripherals failed\n"); > - return -EFAULT; > - } > - > - info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); > - if (info == NULL) { > - err = -ENOMEM; > - goto out_err; > - } > - > - platform_set_drvdata(pdev, info); > - > - nand_hw_control_init(&info->controller); > - > - info->device = &pdev->dev; > - info->platform = plat; > - > - /* initialise chip data struct */ > - chip = &info->chip; > - mtd = nand_to_mtd(&info->chip); > - > - if (plat->data_width) > - chip->options |= NAND_BUSWIDTH_16; > - > - chip->options |= NAND_CACHEPRG | NAND_SKIP_BBTSCAN; > - > - chip->read_buf = (plat->data_width) ? > - bf5xx_nand_read_buf16 : bf5xx_nand_read_buf; > - chip->write_buf = (plat->data_width) ? > - bf5xx_nand_write_buf16 : bf5xx_nand_write_buf; > - > - chip->read_byte = bf5xx_nand_read_byte; > - > - chip->cmd_ctrl = bf5xx_nand_hwcontrol; > - chip->dev_ready = bf5xx_nand_devready; > - > - nand_set_controller_data(chip, mtd); > - chip->controller = &info->controller; > - > - chip->IO_ADDR_R = (void __iomem *) NFC_READ; > - chip->IO_ADDR_W = (void __iomem *) NFC_DATA_WR; > - > - chip->chip_delay = 0; > - > - /* initialise mtd info data struct */ > - mtd->dev.parent = &pdev->dev; > - > - /* initialise the hardware */ > - err = bf5xx_nand_hw_init(info); > - if (err) > - goto out_err; > - > - /* setup hardware ECC data struct */ > - if (hardware_ecc) { > -#ifdef CONFIG_MTD_NAND_BF5XX_BOOTROM_ECC > - mtd_set_ooblayout(mtd, &bootrom_ooblayout_ops); > -#endif > - chip->read_buf = bf5xx_nand_dma_read_buf; > - chip->write_buf = bf5xx_nand_dma_write_buf; > - chip->ecc.calculate = bf5xx_nand_calculate_ecc; > - chip->ecc.correct = bf5xx_nand_correct_data; > - chip->ecc.mode = NAND_ECC_HW; > - chip->ecc.hwctl = bf5xx_nand_enable_hwecc; > - chip->ecc.read_page_raw = bf5xx_nand_read_page_raw; > - chip->ecc.write_page_raw = bf5xx_nand_write_page_raw; > - } else { > - chip->ecc.mode = NAND_ECC_SOFT; > - chip->ecc.algo = NAND_ECC_HAMMING; > - } > - > - /* scan hardware nand chip and setup mtd info data struct */ > - if (bf5xx_nand_scan(mtd)) { > - err = -ENXIO; > - goto out_err_nand_scan; > - } > - > -#ifdef CONFIG_MTD_NAND_BF5XX_BOOTROM_ECC > - chip->badblockpos = 63; > -#endif > - > - /* add NAND partition */ > - bf5xx_nand_add_partition(info); > - > - dev_dbg(&pdev->dev, "initialised ok\n"); > - return 0; > - > -out_err_nand_scan: > - bf5xx_nand_dma_remove(info); > -out_err: > - peripheral_free_list(bfin_nfc_pin_req); > - > - return err; > -} > - > -/* driver device registration */ > -static struct platform_driver bf5xx_nand_driver = { > - .probe = bf5xx_nand_probe, > - .remove = bf5xx_nand_remove, > - .driver = { > - .name = DRV_NAME, > - }, > -}; > - > -module_platform_driver(bf5xx_nand_driver); > - > -MODULE_LICENSE("GPL"); > -MODULE_AUTHOR(DRV_AUTHOR); > -MODULE_DESCRIPTION(DRV_DESC); > -MODULE_ALIAS("platform:" DRV_NAME); -- Boris Brezillon, Bootlin (formerly Free Electrons) Embedded Linux and Kernel engineering https://bootlin.com
