From 8dd851de8184bb39c4ea86de20a0ed2496e6eb0d Mon Sep 17 00:00:00 2001 From: David Woodhouse Date: Fri, 20 Oct 2006 02:11:40 +0100 Subject: =?UTF-8?q?[MTD=20NAND]=20OLPC=20CAF=C3=89=20driver=20update?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - Fix OOB handling, bad block table marker placement - Some cleanups, enable runtime-optional debugging - Allow BBT stuff to be skipped Signed-off-by: David Woodhouse --- drivers/mtd/nand/cafe_nand.c | 135 +++++++++++++++++++++++++++++++------------ 1 file changed, 99 insertions(+), 36 deletions(-) (limited to 'drivers/mtd/nand') diff --git a/drivers/mtd/nand/cafe_nand.c b/drivers/mtd/nand/cafe_nand.c index 8d7a795a947..60cb019b140 100644 --- a/drivers/mtd/nand/cafe_nand.c +++ b/drivers/mtd/nand/cafe_nand.c @@ -5,7 +5,7 @@ * Copyright © 2006 David Woodhouse */ -//#define DEBUG +#define DEBUG #include #undef DEBUG @@ -53,15 +53,24 @@ struct cafe_priv { static int usedma = 1; module_param(usedma, int, 0644); +static int skipbbt = 0; +module_param(skipbbt, int, 0644); + +static int debug = 0; +module_param(debug, int, 0644); + +#define cafe_dev_dbg(dev, args...) do { if (debug) dev_dbg(dev, ##args); } while(0) + + static int cafe_device_ready(struct mtd_info *mtd) { struct cafe_priv *cafe = mtd->priv; int result = !!(readl(cafe->mmio + CAFE_NAND_STATUS) | 0x40000000); - uint32_t irqs = readl(cafe->mmio + 0x10); - writel(irqs, cafe->mmio+0x10); - dev_dbg(&cafe->pdev->dev, "NAND device is%s ready, IRQ %x (%x) (%x,%x)\n", - result?"":" not", irqs, readl(cafe->mmio + 0x10), + uint32_t irqs = readl(cafe->mmio + CAFE_NAND_IRQ); + writel(irqs, cafe->mmio+CAFE_NAND_IRQ); + cafe_dev_dbg(&cafe->pdev->dev, "NAND device is%s ready, IRQ %x (%x) (%x,%x)\n", + result?"":" not", irqs, readl(cafe->mmio + CAFE_NAND_IRQ), readl(cafe->mmio + 0x3008), readl(cafe->mmio + 0x300c)); return result; } @@ -77,7 +86,7 @@ static void cafe_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) memcpy_toio(cafe->mmio + CAFE_NAND_WRITE_DATA + cafe->datalen, buf, len); cafe->datalen += len; - dev_dbg(&cafe->pdev->dev, "Copy 0x%x bytes to write buffer. datalen 0x%x\n", + cafe_dev_dbg(&cafe->pdev->dev, "Copy 0x%x bytes to write buffer. datalen 0x%x\n", len, cafe->datalen); } @@ -90,7 +99,7 @@ static void cafe_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) else memcpy_fromio(buf, cafe->mmio + CAFE_NAND_READ_DATA + cafe->datalen, len); - dev_dbg(&cafe->pdev->dev, "Copy 0x%x bytes from position 0x%x in read buffer.\n", + cafe_dev_dbg(&cafe->pdev->dev, "Copy 0x%x bytes from position 0x%x in read buffer.\n", len, cafe->datalen); cafe->datalen += len; } @@ -101,7 +110,7 @@ static uint8_t cafe_read_byte(struct mtd_info *mtd) uint8_t d; cafe_read_buf(mtd, &d, 1); - dev_dbg(&cafe->pdev->dev, "Read %02x\n", d); + cafe_dev_dbg(&cafe->pdev->dev, "Read %02x\n", d); return d; } @@ -115,14 +124,14 @@ static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command, uint32_t doneint = 0x80000000; int i; - dev_dbg(&cafe->pdev->dev, "cmdfunc %02x, 0x%x, 0x%x\n", + cafe_dev_dbg(&cafe->pdev->dev, "cmdfunc %02x, 0x%x, 0x%x\n", command, column, page_addr); if (command == NAND_CMD_ERASE2 || command == NAND_CMD_PAGEPROG) { /* Second half of a command we already calculated */ writel(cafe->ctl2 | 0x100 | command, cafe->mmio + 0x04); ctl1 = cafe->ctl1; - dev_dbg(&cafe->pdev->dev, "Continue command, ctl1 %08x, #data %d\n", + cafe_dev_dbg(&cafe->pdev->dev, "Continue command, ctl1 %08x, #data %d\n", cafe->ctl1, cafe->nr_data); goto do_command; } @@ -163,7 +172,7 @@ static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command, if (command == NAND_CMD_READID || command == NAND_CMD_STATUS) { ctl1 |= (1<<26); /* rd */ /* Always 5 bytes, for now */ - cafe->datalen = 5; + cafe->datalen = 4; /* And one address cycle -- even for STATUS, since the controller doesn't work without */ adrbytes = 1; } else if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || @@ -183,7 +192,7 @@ static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command, deals with them both at once, later */ cafe->ctl1 = ctl1; cafe->ctl2 = 0; - dev_dbg(&cafe->pdev->dev, "Setup for delayed command, ctl1 %08x, dlen %x\n", + cafe_dev_dbg(&cafe->pdev->dev, "Setup for delayed command, ctl1 %08x, dlen %x\n", cafe->ctl1, cafe->datalen); return; } @@ -194,13 +203,14 @@ static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command, writel(cafe->ctl2 | 0x100 | NAND_CMD_READSTART, cafe->mmio + CAFE_NAND_CTRL2); do_command: - if (cafe->datalen == 2112) - cafe->datalen = 2062; - dev_dbg(&cafe->pdev->dev, "dlen %x, ctl1 %x, ctl2 %x\n", + // ECC on read only works if we ... + // if (cafe->datalen == 2112) + // cafe->datalen = 2062; + cafe_dev_dbg(&cafe->pdev->dev, "dlen %x, ctl1 %x, ctl2 %x\n", cafe->datalen, ctl1, readl(cafe->mmio+CAFE_NAND_CTRL2)); /* NB: The datasheet lies -- we really should be subtracting 1 here */ writel(cafe->datalen, cafe->mmio + CAFE_NAND_DATA_LEN); - writel(0x90000000, cafe->mmio + 0x10); + writel(0x90000000, cafe->mmio + CAFE_NAND_IRQ); if (usedma && (ctl1 & (3<<25))) { uint32_t dmactl = 0xc0000000 + cafe->datalen; /* If WR or RD bits set, set up DMA */ @@ -230,20 +240,20 @@ static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command, ndelay(100); if (1) { - int c = 50000; + int c = 500000; uint32_t irqs; while (c--) { - irqs = readl(cafe->mmio + 0x10); + irqs = readl(cafe->mmio + CAFE_NAND_IRQ); if (irqs & doneint) break; udelay(1); - if (!(c & 1000)) - dev_dbg(&cafe->pdev->dev, "Wait for ready, IRQ %x\n", irqs); + if (!(c % 100000)) + cafe_dev_dbg(&cafe->pdev->dev, "Wait for ready, IRQ %x\n", irqs); cpu_relax(); } - writel(doneint, cafe->mmio + 0x10); - dev_dbg(&cafe->pdev->dev, "Command %x completed after %d usec, irqs %x (%x)\n", command, 50000-c, irqs, readl(cafe->mmio + 0x10)); + writel(doneint, cafe->mmio + CAFE_NAND_IRQ); + cafe_dev_dbg(&cafe->pdev->dev, "Command %x completed after %d usec, irqs %x (%x)\n", command, 50000-c, irqs, readl(cafe->mmio + CAFE_NAND_IRQ)); } @@ -276,18 +286,18 @@ static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command, static void cafe_select_chip(struct mtd_info *mtd, int chipnr) { //struct cafe_priv *cafe = mtd->priv; - // dev_dbg(&cafe->pdev->dev, "select_chip %d\n", chipnr); + // cafe_dev_dbg(&cafe->pdev->dev, "select_chip %d\n", chipnr); } static int cafe_nand_interrupt(int irq, void *id, struct pt_regs *regs) { struct mtd_info *mtd = id; struct cafe_priv *cafe = mtd->priv; - uint32_t irqs = readl(cafe->mmio + 0x10); - writel(irqs & ~0x90000000, cafe->mmio + 0x10); + uint32_t irqs = readl(cafe->mmio + CAFE_NAND_IRQ); + writel(irqs & ~0x90000000, cafe->mmio + CAFE_NAND_IRQ); if (!irqs) return IRQ_NONE; - dev_dbg(&cafe->pdev->dev, "irq, bits %x (%x)\n", irqs, readl(cafe->mmio + 0x10)); + cafe_dev_dbg(&cafe->pdev->dev, "irq, bits %x (%x)\n", irqs, readl(cafe->mmio + CAFE_NAND_IRQ)); return IRQ_HANDLED; } @@ -335,7 +345,7 @@ static int cafe_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip, WARN_ON(chip->oob_poi != chip->buffers->oobrbuf); - dev_dbg(&cafe->pdev->dev, "ECC result %08x SYN1,2 %08x\n", readl(cafe->mmio + 0x3c), readl(cafe->mmio + 0x50)); + cafe_dev_dbg(&cafe->pdev->dev, "ECC result %08x SYN1,2 %08x\n", readl(cafe->mmio + 0x3c), readl(cafe->mmio + 0x50)); chip->read_buf(mtd, buf, mtd->writesize); chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); @@ -343,7 +353,44 @@ static int cafe_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip, return 0; } -static char foo[14]; +static struct nand_ecclayout cafe_oobinfo_2048 = { + .eccbytes = 14, + .eccpos = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, + .oobfree = {{14, 50}} +}; + +/* Ick. The BBT code really ought to be able to work this bit out + for itself from the above */ +static uint8_t cafe_bbt_pattern[] = {'B', 'b', 't', '0' }; +static uint8_t cafe_mirror_pattern[] = {'1', 't', 'b', 'B' }; + +static struct nand_bbt_descr cafe_bbt_main_descr_2048 = { + .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE + | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, + .offs = 14, + .len = 4, + .veroffs = 18, + .maxblocks = 4, + .pattern = cafe_bbt_pattern +}; + +static struct nand_bbt_descr cafe_bbt_mirror_descr_2048 = { + .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE + | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, + .offs = 14, + .len = 4, + .veroffs = 18, + .maxblocks = 4, + .pattern = cafe_mirror_pattern +}; + +static struct nand_ecclayout cafe_oobinfo_512 = { + .eccbytes = 14, + .eccpos = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, + .oobfree = {{14, 2}} +}; + + static void cafe_nand_write_page_lowlevel(struct mtd_info *mtd, struct nand_chip *chip, const uint8_t *buf) { @@ -352,8 +399,7 @@ static void cafe_nand_write_page_lowlevel(struct mtd_info *mtd, WARN_ON(chip->oob_poi != chip->buffers->oobwbuf); chip->write_buf(mtd, buf, mtd->writesize); - chip->write_buf(mtd, foo, 14); - // chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); + chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); /* Set up ECC autogeneration */ cafe->ctl2 |= (1<<27) | (1<<30); @@ -410,6 +456,10 @@ static int cafe_nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, return 0; } +static int cafe_nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) +{ + return 0; +} static int __devinit cafe_nand_probe(struct pci_dev *pdev, const struct pci_device_id *ent) @@ -461,6 +511,11 @@ static int __devinit cafe_nand_probe(struct pci_dev *pdev, /* Enable the following for a flash based bad block table */ cafe->nand.options = NAND_USE_FLASH_BBT | NAND_NO_AUTOINCR | NAND_OWN_BUFFERS; + + if (skipbbt) { + cafe->nand.options |= NAND_SKIP_BBTSCAN; + cafe->nand.block_bad = cafe_nand_block_bad; + } /* Timings from Marvell's test code (not verified or calculated by us) */ writel(0xffffffff, cafe->mmio + CAFE_NAND_IRQ_MASK); @@ -473,7 +528,7 @@ static int __devinit cafe_nand_probe(struct pci_dev *pdev, writel(0xffffffff, cafe->mmio + CAFE_NAND_TIMING2); writel(0xffffffff, cafe->mmio + CAFE_NAND_TIMING3); #endif - writel(0xdfffffff, cafe->mmio + 0x14); + writel(0xffffffff, cafe->mmio + CAFE_NAND_IRQ_MASK); err = request_irq(pdev->irq, &cafe_nand_interrupt, SA_SHIRQ, "CAFE NAND", mtd); if (err) { dev_warn(&pdev->dev, "Could not register IRQ %d\n", pdev->irq); @@ -498,18 +553,18 @@ static int __devinit cafe_nand_probe(struct pci_dev *pdev, writel((cafe->dmaaddr >> 16) >> 16, cafe->mmio + 0x48); else writel(0, cafe->mmio + 0x48); - dev_dbg(&cafe->pdev->dev, "Set DMA address to %x (virt %p)\n", + cafe_dev_dbg(&cafe->pdev->dev, "Set DMA address to %x (virt %p)\n", readl(cafe->mmio+0x44), cafe->dmabuf); /* Enable NAND IRQ in global IRQ mask register */ writel(0x80000007, cafe->mmio + 0x300c); - dev_dbg(&cafe->pdev->dev, "Control %x, IRQ mask %x\n", + cafe_dev_dbg(&cafe->pdev->dev, "Control %x, IRQ mask %x\n", readl(cafe->mmio + 0x3004), readl(cafe->mmio + 0x300c)); #endif #if 1 mtd->writesize=2048; mtd->oobsize = 0x40; - memset(cafe->dmabuf, 0xa5, 2112); + memset(cafe->dmabuf, 0x5a, 2112); cafe->nand.cmdfunc(mtd, NAND_CMD_READID, 0, -1); cafe->nand.read_byte(mtd); cafe->nand.read_byte(mtd); @@ -528,7 +583,7 @@ static int __devinit cafe_nand_probe(struct pci_dev *pdev, #if 0 writel(0x84600070, cafe->mmio); udelay(10); - dev_dbg(&cafe->pdev->dev, "Status %x\n", readl(cafe->mmio + 0x30)); + cafe_dev_dbg(&cafe->pdev->dev, "Status %x\n", readl(cafe->mmio + 0x30)); #endif /* Scan to find existance of the device */ if (nand_scan_ident(mtd, 1)) { @@ -545,6 +600,9 @@ static int __devinit cafe_nand_probe(struct pci_dev *pdev, cafe->nand.ecc.mode = NAND_ECC_HW_SYNDROME; cafe->nand.ecc.size = mtd->writesize; cafe->nand.ecc.bytes = 14; + cafe->nand.ecc.layout = &cafe_oobinfo_2048; + cafe->nand.bbt_td = &cafe_bbt_main_descr_2048; + cafe->nand.bbt_md = &cafe_bbt_mirror_descr_2048; cafe->nand.ecc.hwctl = (void *)cafe_nand_bug; cafe->nand.ecc.calculate = (void *)cafe_nand_bug; cafe->nand.ecc.correct = (void *)cafe_nand_bug; @@ -564,7 +622,6 @@ static int __devinit cafe_nand_probe(struct pci_dev *pdev, if (err) goto out_irq; - pci_set_drvdata(pdev, mtd); add_mtd_device(mtd); goto out; @@ -633,3 +690,9 @@ MODULE_DESCRIPTION("NAND flash driver for OLPC CAFE chip"); /* Correct ECC for 2048 bytes of 0xff: 41 a0 71 65 54 27 f3 93 ec a9 be ed 0b a1 */ + +/* dwmw2's B-test board, in case of completely screwing it: +Bad eraseblock 2394 at 0x12b40000 +Bad eraseblock 2627 at 0x14860000 +Bad eraseblock 3349 at 0x1a2a0000 +*/ -- cgit v1.2.3