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);
+ uint32_t 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);
+ uint32_t 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 uint8_t *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 uint8_t flctl_read_byte(struct mtd_info *mtd)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ int index = flctl->index;
+ uint8_t data;
+
+ data = flctl->done_buff[index];
+ flctl->index++;
+ return data;
+}
+
+static void flctl_read_buf(struct mtd_info *mtd, uint8_t *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 + 1);
+ 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");
projects / linux-2.6-omap-h63xx.git / commitdiff