From patchwork Tue Sep 9 08:00:30 2008 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 217 Return-Path: X-Original-To: patchwork@ozlabs.org Delivered-To: patchwork@ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id C7D1CDDF01 for ; Tue, 9 Sep 2008 18:01:00 +1000 (EST) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.68 #1 (Red Hat Linux)) id 1Kcy9P-0001MG-2l; Tue, 09 Sep 2008 08:00:39 +0000 Received: from mail.renesas.com ([202.234.163.13] helo=mail01.idc.renesas.com) by bombadil.infradead.org with esmtp (Exim 4.68 #1 (Red Hat Linux)) id 1Kcy9L-000191-KW; Tue, 09 Sep 2008 08:00:37 +0000 X-AuditID: ac140384-0000000400000ffd-49-48c62d1f3a1e Received: from guardian01.idc.renesas.com ([172.20.8.200]) by mail01.idc.renesas.com (sendmail) with ESMTP id m8980Ugm028373; Tue, 9 Sep 2008 17:00:30 +0900 (JST) Received: (from root@localhost) by guardian01.idc.renesas.com with id m8980Vwt016250; Tue, 9 Sep 2008 17:00:31 +0900 (JST) Received: from mta02.idc.renesas.com (localhost [127.0.0.1]) by mta02.idc.renesas.com with ESMTP id m8980WP1012681; Tue, 9 Sep 2008 17:00:32 +0900 (JST) Received: from [172.30.8.157] by ims05.idc.renesas.com (Sendmail) with ESMTPA id <0K6X0045E4WV6F@ims05.idc.renesas.com>; Tue, 09 Sep 2008 17:00:31 +0900 (JST) Date: Tue, 09 Sep 2008 17:00:30 +0900 From: Yoshihiro Shimoda Subject: [PATCH] mtd: sh_flctl: add support for Renesas SuperH FLCTL To: dwmw2@infradead.org Message-id: <48C62D1E.7020906@renesas.com> MIME-version: 1.0 User-Agent: Thunderbird 2.0.0.14 (Windows/20080421) X-Brightmail-Tracker: AAAAAA== X-Spam-Score: 0.0 (/) Cc: linux-mtd@lists.infradead.org, linux-sh@vger.kernel.org X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.9 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+patchwork=ozlabs.org@lists.infradead.org Several Renesas SuperH CPU has FLCTL. The FLCTL support NAND Flash. This driver support SH7723. Signed-off-by: Yoshihiro Shimoda Acked-by: Paul Mundt diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index 41f361c..c3182de 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -406,4 +406,11 @@ config MTD_NAND_FSL_UPM Enables support for NAND Flash chips wired onto Freescale PowerPC processor localbus with User-Programmable Machine support. +config MTD_NAND_SH_FLCTL + tristate "Support for NAND on Renesas SuperH FLCTL" + depends on MTD_NAND && SUPERH && CPU_SUBTYPE_SH7723 + help + Several Renesas SuperH CPU has FLCTL. This option enables support + for NAND Flash using FLCTL. This driver support SH7723. + endif # MTD_NAND diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index b786c5d..2cc2d58 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -34,5 +34,6 @@ obj-$(CONFIG_MTD_NAND_PASEMI) += pasemi_nand.o obj-$(CONFIG_MTD_NAND_ORION) += orion_nand.o obj-$(CONFIG_MTD_NAND_FSL_ELBC) += fsl_elbc_nand.o obj-$(CONFIG_MTD_NAND_FSL_UPM) += fsl_upm.o +obj-$(CONFIG_MTD_NAND_SH_FLCTL) += sh_flctl.o nand-objs := nand_base.o nand_bbt.o diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c new file mode 100644 index 0000000..326363c --- /dev/null +++ b/drivers/mtd/nand/sh_flctl.c @@ -0,0 +1,878 @@ +/* + * SuperH FLCTL nand controller + * + * Copyright (C) 2008 Renesas Solutions Corp. + * Copyright (C) 2008 Atom Create Engineering Co., Ltd. + * + * Based on fsl_elbc_nand.c, Copyright (c) 2006-2007 Freescale Semiconductor + * + * 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; version 2 of the License. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +static struct nand_ecclayout flctl_4secc_oob_16 = { + .eccbytes = 10, + .eccpos = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, + .oobfree = { + {.offset = 12, + . length = 4} }, +}; + +static struct nand_ecclayout flctl_4secc_oob_64 = { + .eccbytes = 10, + .eccpos = {48, 49, 50, 51, 52, 53, 54, 55, 56, 57}, + .oobfree = { + {.offset = 60, + . length = 4} }, +}; + +static uint8_t scan_ff_pattern[] = { 0xff, 0xff }; + +static struct nand_bbt_descr flctl_4secc_smallpage = { + .options = NAND_BBT_SCAN2NDPAGE, + .offs = 11, + .len = 1, + .pattern = scan_ff_pattern, +}; + +static struct nand_bbt_descr flctl_4secc_largepage = { + .options = 0, + .offs = 58, + .len = 2, + .pattern = scan_ff_pattern, +}; + +static void empty_fifo(struct sh_flctl *flctl) +{ + writel(0x000c0000, FLINTDMACR(flctl)); /* FIFO Clear */ + writel(0x00000000, FLINTDMACR(flctl)); /* Clear Error flags */ +} + +static void start_translation(struct sh_flctl *flctl) +{ + writeb(TRSTRT, FLTRCR(flctl)); +} + +static void wait_completion(struct sh_flctl *flctl) +{ + u32 timeout = LOOP_TIMEOUT_MAX; + + while (timeout--) { + if (readb(FLTRCR(flctl)) & TREND) { + writeb(0x0, FLTRCR(flctl)); + return; + } + udelay(1); + } + + printk(KERN_ERR "wait_completion(): Timeout occured \n"); + writeb(0x0, FLTRCR(flctl)); +} + +static void set_addr(struct mtd_info *mtd, int column, int page_addr) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + u32 addr = 0; + + if (column == -1) { + addr = page_addr; /* ERASE1 */ + } else if (page_addr != -1) { + /* SEQIN, READ0, etc.. */ + if (flctl->page_size) { + addr = column & 0x0FFF; + addr |= (page_addr & 0xff) << 16; + addr |= ((page_addr >> 8) & 0xff) << 24; + /* big than 128MB */ + if (flctl->rw_ADRCNT == ADRCNT2_E) { + u32 addr2; + addr2 = (page_addr >> 16) & 0xff; + writel(addr2, FLADR2(flctl)); + } + } else { + addr = column; + addr |= (page_addr & 0xff) << 8; + addr |= ((page_addr >> 8) & 0xff) << 16; + addr |= ((page_addr >> 16) & 0xff) << 24; + } + } + writel(addr, FLADR(flctl)); +} + +static void wait_rfifo_ready(struct sh_flctl *flctl) +{ + u32 timeout = LOOP_TIMEOUT_MAX; + + while (timeout--) { + u32 val; + /* check FIFO */ + val = readl(FLDTCNTR(flctl)) >> 16; + if (val & 0xFF) + return; + udelay(1); + } + printk(KERN_ERR "wait_rfifo_ready(): Timeout occured \n"); +} + +static void wait_wfifo_ready(struct sh_flctl *flctl) +{ + u32 len, timeout = LOOP_TIMEOUT_MAX; + + while (timeout--) { + /* check FIFO */ + len = (readl(FLDTCNTR(flctl)) >> 16) & 0xFF; + if (len >= 4) + return; + udelay(1); + } + printk(KERN_ERR "wait_wfifo_ready(): Timeout occured \n"); +} + +static int wait_recfifo_ready(struct sh_flctl *flctl) +{ + u32 timeout = LOOP_TIMEOUT_MAX; + int checked[4]; + void __iomem *ecc_reg[4]; + int i; + u32 data, size; + + memset(checked, 0, sizeof(checked)); + + while (timeout--) { + size = readl(FLDTCNTR(flctl)) >> 24; + if (size & 0xFF) + return 0; /* success */ + + if (readl(FL4ECCCR(flctl)) & _4ECCFA) + return 1; /* can't correct */ + + udelay(1); + if (!(readl(FL4ECCCR(flctl)) & _4ECCEND)) + continue; + + /* start error correction */ + ecc_reg[0] = FL4ECCRESULT0(flctl); + ecc_reg[1] = FL4ECCRESULT1(flctl); + ecc_reg[2] = FL4ECCRESULT2(flctl); + ecc_reg[3] = FL4ECCRESULT3(flctl); + + for (i = 0; i < 3; i++) { + data = readl(ecc_reg[i]); + if (data != INIT_FL4ECCRESULT_VAL && !checked[i]) { + u8 org; + int index; + + index = data >> 16; + org = flctl->done_buff[index]; + flctl->done_buff[index] = org ^ (data & 0xFF); + checked[i] = 1; + } + } + + writel(0, FL4ECCCR(flctl)); + } + + printk(KERN_ERR "wait_recfifo_ready(): Timeout occured \n"); + return 1; /* timeout */ +} + +static void wait_wecfifo_ready(struct sh_flctl *flctl) +{ + u32 timeout = LOOP_TIMEOUT_MAX; + u32 len; + + while (timeout--) { + /* check FLECFIFO */ + len = (readl(FLDTCNTR(flctl)) >> 24) & 0xFF; + if (len >= 4) + return; + udelay(1); + } + printk(KERN_ERR "wait_wecfifo_ready(): Timeout occured \n"); +} + +static void read_datareg(struct sh_flctl *flctl, int offset) +{ + unsigned long data; + unsigned long *buf = (unsigned long *)&flctl->done_buff[offset]; + + wait_completion(flctl); + + data = readl(FLDATAR(flctl)); + *buf = le32_to_cpu(data); +} + +static void read_fiforeg(struct sh_flctl *flctl, int rlen, int offset) +{ + int i, len_4align; + unsigned long *buf = (unsigned long *)&flctl->done_buff[offset]; + void *fifo_addr = (void *)FLDTFIFO(flctl); + + len_4align = (rlen + 3) / 4; + + for (i = 0; i < len_4align; i++) { + wait_rfifo_ready(flctl); + buf[i] = readl(fifo_addr); + buf[i] = be32_to_cpu(buf[i]); + } +} + +static int read_ecfiforeg(struct sh_flctl *flctl, u8 *buff) +{ + int i; + unsigned long *ecc_buf = (unsigned long *)buff; + void *fifo_addr = (void *)FLECFIFO(flctl); + + for (i = 0; i < 4; i++) { + if (wait_recfifo_ready(flctl)) + return 1; + ecc_buf[i] = readl(fifo_addr); + ecc_buf[i] = be32_to_cpu(ecc_buf[i]); + } + + return 0; +} + +static void write_fiforeg(struct sh_flctl *flctl, int rlen, int offset) +{ + int i, len_4align; + unsigned long *data = (unsigned long *)&flctl->done_buff[offset]; + void *fifo_addr = (void *)FLDTFIFO(flctl); + + len_4align = (rlen + 3) / 4; + for (i = 0; i < len_4align; i++) { + wait_wfifo_ready(flctl); + writel(cpu_to_be32(data[i]), fifo_addr); + } +} + +static void set_cmd_regs(struct mtd_info *mtd, u32 cmd, u32 flcmcdr_val) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + u32 flcmncr_val = readl(FLCMNCR(flctl)); + u32 flcmdcr_val, addr_len_bytes = 0; + + /* Set SNAND bit if page size is 2048byte */ + if (flctl->page_size) + flcmncr_val |= SNAND_E; + else + flcmncr_val &= ~SNAND_E; + + /* default FLCMDCR val */ + flcmdcr_val = DOCMD1_E | DOADR_E; + + /* Set for FLCMDCR */ + switch (cmd) { + case NAND_CMD_ERASE1: + addr_len_bytes = flctl->erase_ADRCNT; + flcmdcr_val |= DOCMD2_E; + break; + case NAND_CMD_READ0: + case NAND_CMD_READOOB: + addr_len_bytes = flctl->rw_ADRCNT; + flcmdcr_val |= CDSRC_E; + break; + case NAND_CMD_SEQIN: + /* This case is that cmd is READ0 or READ1 or READ00 */ + flcmdcr_val &= ~DOADR_E; /* ONLY execute 1st cmd */ + break; + case NAND_CMD_PAGEPROG: + addr_len_bytes = flctl->rw_ADRCNT; + flcmdcr_val |= DOCMD2_E | CDSRC_E | SELRW; + break; + case NAND_CMD_READID: + flcmncr_val &= ~SNAND_E; + addr_len_bytes = ADRCNT_1; + break; + case NAND_CMD_STATUS: + case NAND_CMD_RESET: + flcmncr_val &= ~SNAND_E; + flcmdcr_val &= ~(DOADR_E | DOSR_E); + break; + default: + break; + } + + /* Set address bytes parameter */ + flcmdcr_val |= addr_len_bytes; + + /* Now actually write */ + writel(flcmncr_val, FLCMNCR(flctl)); + writel(flcmdcr_val, FLCMDCR(flctl)); + writel(flcmcdr_val, FLCMCDR(flctl)); +} + +static int flctl_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, + uint8_t *buf) +{ + int i, eccsize = chip->ecc.size; + int eccbytes = chip->ecc.bytes; + int eccsteps = chip->ecc.steps; + uint8_t *p = buf; + struct sh_flctl *flctl = mtd_to_flctl(mtd); + + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) + chip->read_buf(mtd, p, eccsize); + + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) { + if (flctl->hwecc_cant_correct[i]) + mtd->ecc_stats.failed++; + else + mtd->ecc_stats.corrected += 0; + } + + return 0; +} + +static void flctl_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, + const uint8_t *buf) +{ + int i, eccsize = chip->ecc.size; + int eccbytes = chip->ecc.bytes; + int eccsteps = chip->ecc.steps; + const uint8_t *p = buf; + + for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) + chip->write_buf(mtd, p, eccsize); +} + +static void execmd_read_page_sector(struct mtd_info *mtd, int page_addr) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + int sector, page_sectors; + + if (flctl->page_size) + page_sectors = 4; + else + page_sectors = 1; + + writel(readl(FLCMNCR(flctl)) | ACM_SACCES_MODE | _4ECCCORRECT, + FLCMNCR(flctl)); + + set_cmd_regs(mtd, NAND_CMD_READ0, + (NAND_CMD_READSTART << 8) | NAND_CMD_READ0); + + for (sector = 0; sector < page_sectors; sector++) { + int ret; + + empty_fifo(flctl); + writel(readl(FLCMDCR(flctl)) | 1, FLCMDCR(flctl)); + writel(page_addr << 2 | sector, FLADR(flctl)); + + start_translation(flctl); + read_fiforeg(flctl, 512, 512 * sector); + + ret = read_ecfiforeg(flctl, + &flctl->done_buff[mtd->writesize + 16 * sector]); + + if (ret) + flctl->hwecc_cant_correct[sector] = 1; + + writel(0x0, FL4ECCCR(flctl)); + wait_completion(flctl); + } + writel(readl(FLCMNCR(flctl)) & ~(ACM_SACCES_MODE | _4ECCCORRECT), + FLCMNCR(flctl)); +} + +static void execmd_read_oob(struct mtd_info *mtd, int page_addr) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + + set_cmd_regs(mtd, NAND_CMD_READ0, + (NAND_CMD_READSTART << 8) | NAND_CMD_READ0); + + empty_fifo(flctl); + if (flctl->page_size) { + int i; + /* In case that the page size is 2k */ + for (i = 0; i < 16 * 3; i++) + flctl->done_buff[i] = 0xFF; + + set_addr(mtd, 3 * 528 + 512, page_addr); + writel(16, FLDTCNTR(flctl)); + + start_translation(flctl); + read_fiforeg(flctl, 16, 16 * 3); + wait_completion(flctl); + } else { + /* In case that the page size is 512b */ + set_addr(mtd, 512, page_addr); + writel(16, FLDTCNTR(flctl)); + + start_translation(flctl); + read_fiforeg(flctl, 16, 0); + wait_completion(flctl); + } +} + +static void execmd_write_page_sector(struct mtd_info *mtd) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + int i, page_addr = flctl->seqin_page_addr; + int sector, page_sectors; + + if (flctl->page_size) + page_sectors = 4; + else + page_sectors = 1; + + writel(readl(FLCMNCR(flctl)) | ACM_SACCES_MODE, FLCMNCR(flctl)); + + set_cmd_regs(mtd, NAND_CMD_PAGEPROG, + (NAND_CMD_PAGEPROG << 8) | NAND_CMD_SEQIN); + + for (sector = 0; sector < page_sectors; sector++) { + empty_fifo(flctl); + writel(readl(FLCMDCR(flctl)) | 1, FLCMDCR(flctl)); + writel(page_addr << 2 | sector, FLADR(flctl)); + + start_translation(flctl); + write_fiforeg(flctl, 512, 512 * sector); + + for (i = 0; i < 4; i++) { + wait_wecfifo_ready(flctl); /* wait for write ready */ + writel(0xFFFFFFFF, FLECFIFO(flctl)); + } + wait_completion(flctl); + } + + writel(readl(FLCMNCR(flctl)) & ~ACM_SACCES_MODE, FLCMNCR(flctl)); +} + +static void execmd_write_oob(struct mtd_info *mtd) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + int page_addr = flctl->seqin_page_addr; + int sector, page_sectors; + + if (flctl->page_size) { + sector = 3; + page_sectors = 4; + } else { + sector = 0; + page_sectors = 1; + } + + set_cmd_regs(mtd, NAND_CMD_PAGEPROG, + (NAND_CMD_PAGEPROG << 8) | NAND_CMD_SEQIN); + + for (; sector < page_sectors; sector++) { + empty_fifo(flctl); + set_addr(mtd, sector * 528 + 512, page_addr); + writel(16, FLDTCNTR(flctl)); /* set read size */ + + start_translation(flctl); + write_fiforeg(flctl, 16, 16 * sector); + wait_completion(flctl); + } +} + +static void flctl_cmdfunc(struct mtd_info *mtd, unsigned int command, + int column, int page_addr) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + u32 read_cmd = 0; + + flctl->read_bytes = 0; + if (command != NAND_CMD_PAGEPROG) + flctl->index = 0; + + switch (command) { + case NAND_CMD_READ1: + case NAND_CMD_READ0: + if (flctl->hwecc) { + /* read page with hwecc */ + execmd_read_page_sector(mtd, page_addr); + break; + } + empty_fifo(flctl); + if (flctl->page_size) + set_cmd_regs(mtd, command, (NAND_CMD_READSTART << 8) + | command); + else + set_cmd_regs(mtd, command, command); + + set_addr(mtd, 0, page_addr); + + flctl->read_bytes = mtd->writesize + mtd->oobsize; + flctl->index += column; + goto read_normal_exit; + + case NAND_CMD_READOOB: + if (flctl->hwecc) { + /* read page with hwecc */ + execmd_read_oob(mtd, page_addr); + break; + } + + empty_fifo(flctl); + if (flctl->page_size) { + set_cmd_regs(mtd, command, (NAND_CMD_READSTART << 8) + | NAND_CMD_READ0); + set_addr(mtd, mtd->writesize, page_addr); + } else { + set_cmd_regs(mtd, command, command); + set_addr(mtd, 0, page_addr); + } + flctl->read_bytes = mtd->oobsize; + goto read_normal_exit; + + case NAND_CMD_READID: + empty_fifo(flctl); + set_cmd_regs(mtd, command, command); + set_addr(mtd, 0, 0); + + flctl->read_bytes = 4; + writel(flctl->read_bytes, FLDTCNTR(flctl)); /* set read size */ + start_translation(flctl); + read_datareg(flctl, 0); /* read and end */ + break; + + case NAND_CMD_ERASE1: + flctl->erase1_page_addr = page_addr; + break; + + case NAND_CMD_ERASE2: + set_cmd_regs(mtd, NAND_CMD_ERASE1, + (command << 8) | NAND_CMD_ERASE1); + set_addr(mtd, -1, flctl->erase1_page_addr); + start_translation(flctl); + wait_completion(flctl); + break; + + case NAND_CMD_SEQIN: + if (!flctl->page_size) { + /* output read command */ + if (column >= mtd->writesize) { + column -= mtd->writesize; + read_cmd = NAND_CMD_READOOB; + } else if (column < 256) { + read_cmd = NAND_CMD_READ0; + } else { + column -= 256; + read_cmd = NAND_CMD_READ1; + } + } + flctl->seqin_column = column; + flctl->seqin_page_addr = page_addr; + flctl->seqin_read_cmd = read_cmd; + break; + + case NAND_CMD_PAGEPROG: + empty_fifo(flctl); + if (!flctl->page_size) { + set_cmd_regs(mtd, NAND_CMD_SEQIN, + flctl->seqin_read_cmd); + set_addr(mtd, -1, -1); + writel(0, FLDTCNTR(flctl)); /* set 0 size */ + start_translation(flctl); + wait_completion(flctl); + } + if (flctl->hwecc) { + /* write page with hwecc */ + if (flctl->seqin_column == mtd->writesize) + execmd_write_oob(mtd); + else if (!flctl->seqin_column) + execmd_write_page_sector(mtd); + else + printk(KERN_ERR "Invalid address !?\n"); + break; + } + set_cmd_regs(mtd, command, (command << 8) | NAND_CMD_SEQIN); + set_addr(mtd, flctl->seqin_column, flctl->seqin_page_addr); + writel(flctl->index, FLDTCNTR(flctl)); /* set write size */ + start_translation(flctl); + write_fiforeg(flctl, flctl->index, 0); + wait_completion(flctl); + break; + + case NAND_CMD_STATUS: + set_cmd_regs(mtd, command, command); + set_addr(mtd, -1, -1); + + flctl->read_bytes = 1; + writel(flctl->read_bytes, FLDTCNTR(flctl)); /* set read size */ + start_translation(flctl); + read_datareg(flctl, 0); /* read and end */ + break; + + case NAND_CMD_RESET: + set_cmd_regs(mtd, command, command); + set_addr(mtd, -1, -1); + + writel(0, FLDTCNTR(flctl)); /* set 0 size */ + start_translation(flctl); + wait_completion(flctl); + break; + + default: + break; + } + return; + +read_normal_exit: + writel(flctl->read_bytes, FLDTCNTR(flctl)); /* set read size */ + start_translation(flctl); + read_fiforeg(flctl, flctl->read_bytes, 0); + wait_completion(flctl); + return; +} + +static void flctl_select_chip(struct mtd_info *mtd, int chipnr) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + u32 flcmncr_val = readl(FLCMNCR(flctl)); + + switch (chipnr) { + case -1: + flcmncr_val &= ~CE0_ENABLE; + writel(flcmncr_val, FLCMNCR(flctl)); + break; + case 0: + flcmncr_val |= CE0_ENABLE; + writel(flcmncr_val, FLCMNCR(flctl)); + break; + default: + BUG(); + } +} + +static void flctl_write_buf(struct mtd_info *mtd, const u8 *buf, int len) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + int i, index = flctl->index; + + for (i = 0; i < len; i++) + flctl->done_buff[index + i] = buf[i]; + flctl->index += len; +} + +static u8 flctl_read_byte(struct mtd_info *mtd) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + int index = flctl->index; + u8 data; + + data = flctl->done_buff[index]; + flctl->index++; + return data; +} + +static void flctl_read_buf(struct mtd_info *mtd, u8 *buf, int len) +{ + int i; + + for (i = 0; i < len; i++) + buf[i] = flctl_read_byte(mtd); +} + +static int flctl_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) +{ + int i; + + for (i = 0; i < len; i++) + if (buf[i] != flctl_read_byte(mtd)) + return -EFAULT; + return 0; +} + +static void flctl_register_init(struct sh_flctl *flctl, unsigned long val) +{ + writel(val, FLCMNCR(flctl)); +} + +static int flctl_chip_init_tail(struct mtd_info *mtd) +{ + struct sh_flctl *flctl = mtd_to_flctl(mtd); + struct nand_chip *chip = &flctl->chip; + + if (mtd->writesize == 512) { + flctl->page_size = 0; + if (chip->chipsize > (32 << 20)) { + /* big than 32MB */ + flctl->rw_ADRCNT = ADRCNT_4; + flctl->erase_ADRCNT = ADRCNT_3; + } else if (chip->chipsize > (2 << 16)) { + /* big than 128KB */ + flctl->rw_ADRCNT = ADRCNT_3; + flctl->erase_ADRCNT = ADRCNT_2; + } else { + flctl->rw_ADRCNT = ADRCNT_2; + flctl->erase_ADRCNT = ADRCNT_1; + } + } else { + flctl->page_size = 1; + if (chip->chipsize > (128 << 20)) { + /* big than 128MB */ + flctl->rw_ADRCNT = ADRCNT2_E; + flctl->erase_ADRCNT = ADRCNT_3; + } else if (chip->chipsize > (8 << 16)) { + /* big than 512KB */ + flctl->rw_ADRCNT = ADRCNT_4; + flctl->erase_ADRCNT = ADRCNT_2; + } else { + flctl->rw_ADRCNT = ADRCNT_3; + flctl->erase_ADRCNT = ADRCNT_1; + } + } + + if (flctl->hwecc) { + if (mtd->writesize == 512) { + chip->ecc.layout = &flctl_4secc_oob_16; + chip->badblock_pattern = &flctl_4secc_smallpage; + } else { + chip->ecc.layout = &flctl_4secc_oob_64; + chip->badblock_pattern = &flctl_4secc_largepage; + } + + chip->ecc.size = 512; + chip->ecc.bytes = 10; + chip->ecc.read_page = flctl_read_page_hwecc; + chip->ecc.write_page = flctl_write_page_hwecc; + chip->ecc.mode = NAND_ECC_HW; + + /* 4 symbols ECC enabled */ + writel(readl(FLCMNCR(flctl)) | _4ECCEN | ECCPOS2 | ECCPOS_02, + FLCMNCR(flctl)); + } else { + chip->ecc.mode = NAND_ECC_SOFT; + } + + return 0; +} + +static int __init flctl_probe(struct platform_device *pdev) +{ + struct resource *res; + struct sh_flctl *flctl; + struct mtd_info *flctl_mtd; + struct nand_chip *nand; + struct sh_flctl_platform_data *pdata; + int ret; + + pdata = pdev->dev.platform_data; + if (pdata == NULL) { + printk(KERN_ERR "sh_flctl platform_data not found.\n"); + return -ENODEV; + } + + flctl = kzalloc(sizeof(struct sh_flctl), GFP_KERNEL); + if (!flctl) { + printk(KERN_ERR "Unable to allocate NAND MTD dev structure.\n"); + return -ENOMEM; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + printk(KERN_ERR "%s: resource not found.\n", __func__); + ret = -ENODEV; + goto err; + } + + flctl->reg = ioremap(res->start, res->end - res->start); + if (flctl->reg == NULL) { + printk(KERN_ERR "%s: ioremap error.\n", __func__); + ret = -ENOMEM; + goto err; + } + + platform_set_drvdata(pdev, flctl); + flctl_mtd = &flctl->mtd; + nand = &flctl->chip; + flctl_mtd->priv = nand; + flctl->hwecc = pdata->has_hwecc; + + flctl_register_init(flctl, pdata->flcmncr_val); + + nand->options = NAND_NO_AUTOINCR; + + /* Set address of hardware control function */ + /* 20 us command delay time */ + nand->chip_delay = 20; + + nand->read_byte = flctl_read_byte; + nand->write_buf = flctl_write_buf; + nand->read_buf = flctl_read_buf; + nand->verify_buf = flctl_verify_buf; + nand->select_chip = flctl_select_chip; + nand->cmdfunc = flctl_cmdfunc; + + ret = nand_scan_ident(flctl_mtd, 1); + if (ret) + goto err; + + ret = flctl_chip_init_tail(flctl_mtd); + if (ret) + goto err; + + ret = nand_scan_tail(flctl_mtd); + if (ret) + goto err; + + add_mtd_partitions(flctl_mtd, pdata->parts, pdata->nr_parts); + + return 0; + +err: + kfree(flctl); + return ret; +} + +static int __exit flctl_remove(struct platform_device *pdev) +{ + struct sh_flctl *flctl = platform_get_drvdata(pdev); + + nand_release(&flctl->mtd); + kfree(flctl); + + return 0; +} + +static struct platform_driver flctl_driver = { + .probe = flctl_probe, + .remove = flctl_remove, + .driver = { + .name = "sh_flctl", + .owner = THIS_MODULE, + }, +}; + +static int __init flctl_nand_init(void) +{ + return platform_driver_register(&flctl_driver); +} + +static void __exit flctl_nand_cleanup(void) +{ + platform_driver_unregister(&flctl_driver); +} + +module_init(flctl_nand_init); +module_exit(flctl_nand_cleanup); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Yoshihiro Shimoda"); +MODULE_DESCRIPTION("SuperH FLCTL driver"); +MODULE_ALIAS("platform:sh_flctl"); diff --git a/include/linux/mtd/sh_flctl.h b/include/linux/mtd/sh_flctl.h new file mode 100644 index 0000000..d0ec3e3 --- /dev/null +++ b/include/linux/mtd/sh_flctl.h @@ -0,0 +1,125 @@ +/* + * SuperH FLCTL nand controller + * + * Copyright (C) 2008 Renesas Solutions Corp. + * + * 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; version 2 of the License. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef __SH_FLCTL_H__ +#define __SH_FLCTL_H__ + +#include +#include +#include + +/* FLCTL registers */ +#define FLCMNCR(f) (f->reg + 0x0) +#define FLCMDCR(f) (f->reg + 0x4) +#define FLCMCDR(f) (f->reg + 0x8) +#define FLADR(f) (f->reg + 0xC) +#define FLADR2(f) (f->reg + 0x3C) +#define FLDATAR(f) (f->reg + 0x10) +#define FLDTCNTR(f) (f->reg + 0x14) +#define FLINTDMACR(f) (f->reg + 0x18) +#define FLBSYTMR(f) (f->reg + 0x1C) +#define FLBSYCNT(f) (f->reg + 0x20) +#define FLDTFIFO(f) (f->reg + 0x24) +#define FLECFIFO(f) (f->reg + 0x28) +#define FLTRCR(f) (f->reg + 0x2C) +#define FL4ECCRESULT0(f) (f->reg + 0x80) +#define FL4ECCRESULT1(f) (f->reg + 0x84) +#define FL4ECCRESULT2(f) (f->reg + 0x88) +#define FL4ECCRESULT3(f) (f->reg + 0x8C) +#define FL4ECCCR(f) (f->reg + 0x90) +#define FL4ECCCNT(f) (f->reg + 0x94) +#define FLERRADR(f) (f->reg + 0x98) + +/* FLCMNCR control bits */ +#define ECCPOS2 (0x1 << 25) +#define _4ECCCNTEN (0x1 << 24) +#define _4ECCEN (0x1 << 23) +#define _4ECCCORRECT (0x1 << 22) +#define SNAND_E (0x1 << 18) /* SNAND (0=512 1=2048)*/ +#define QTSEL_E (0x1 << 17) +#define ENDIAN (0x1 << 16) /* 1 = little endian */ +#define FCKSEL_E (0x1 << 15) +#define ECCPOS_00 (0x00 << 12) +#define ECCPOS_01 (0x01 << 12) +#define ECCPOS_02 (0x02 << 12) +#define ACM_SACCES_MODE (0x01 << 10) +#define NANWF_E (0x1 << 9) +#define SE_D (0x1 << 8) /* Spare area disable */ +#define CE1_ENABLE (0x1 << 4) /* Chip Enable 1 */ +#define CE0_ENABLE (0x1 << 3) /* Chip Enable 0 */ +#define TYPESEL_SET (0x1 << 0) + +/* FLCMDCR control bits */ +#define ADRCNT2_E (0x1 << 31) /* 5byte address enable */ +#define ADRMD_E (0x1 << 26) /* Sector address access */ +#define CDSRC_E (0x1 << 25) /* Data buffer selection */ +#define DOSR_E (0x1 << 24) /* Status read check */ +#define SELRW (0x1 << 21) /* 0:read 1:write */ +#define DOADR_E (0x1 << 20) /* Address stage execute */ +#define ADRCNT_1 (0x00 << 18) /* Address data bytes: 1byte */ +#define ADRCNT_2 (0x01 << 18) /* Address data bytes: 2byte */ +#define ADRCNT_3 (0x02 << 18) /* Address data bytes: 3byte */ +#define ADRCNT_4 (0x03 << 18) /* Address data bytes: 4byte */ +#define DOCMD2_E (0x1 << 17) /* 2nd cmd stage execute */ +#define DOCMD1_E (0x1 << 16) /* 1st cmd stage execute */ + +/* FLTRCR control bits */ +#define TRSTRT (0x1 << 0) /* translation start */ +#define TREND (0x1 << 1) /* translation end */ + +/* FL4ECCCR control bits */ +#define _4ECCFA (0x1 << 2) /* 4 symbols correct fault */ +#define _4ECCEND (0x1 << 1) /* 4 symbols end */ +#define _4ECCEXST (0x1 << 0) /* 4 symbols exist */ + +#define INIT_FL4ECCRESULT_VAL 0x03FF03FF +#define LOOP_TIMEOUT_MAX 0x00010000 + +#define mtd_to_flctl(mtd) container_of(mtd, struct sh_flctl, mtd) + +struct sh_flctl { + struct mtd_info mtd; + struct nand_chip chip; + void __iomem *reg; + + u8 done_buff[2048 + 64]; /* max size 2048 + 64 */ + int read_bytes; + int index; + int seqin_column; /* column in SEQIN cmd */ + int seqin_page_addr; /* page_addr in SEQIN cmd */ + u32 seqin_read_cmd; /* read cmd in SEQIN cmd */ + int erase1_page_addr; /* page_addr in ERASE1 cmd */ + u32 erase_ADRCNT; /* bits of FLCMDCR in ERASE1 cmd */ + u32 rw_ADRCNT; /* bits of FLCMDCR in READ WRITE cmd */ + + int hwecc_cant_correct[4]; + + unsigned page_size:1; /* NAND page size (0 = 512, 1 = 2048) */ + unsigned hwecc:1; /* Hardware ECC (0 = disabled, 1 = enabled) */ +}; + +struct sh_flctl_platform_data { + struct mtd_partition *parts; + int nr_parts; + unsigned long flcmncr_val; + + unsigned has_hwecc:1; +}; + +#endif /* __SH_FLCTL_H__ */