mirror of https://gitee.com/openkylin/linux.git
Merge git://git.infradead.org/~dwmw2/cafe-2.6
Conflicts: drivers/mtd/nand/Kconfig
This commit is contained in:
David Woodhouse
commit
c45aa055c3
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@ -219,6 +219,13 @@ config MTD_NAND_SHARPSL
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tristate "Support for NAND Flash on Sharp SL Series (C7xx + others)"
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depends on MTD_NAND && ARCH_PXA
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config MTD_NAND_CAFE
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tristate "NAND support for OLPC CAFÉ chip"
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depends on PCI
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help
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Use NAND flash attached to the CAFÉ chip designed for the $100
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laptop.
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config MTD_NAND_CS553X
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tristate "NAND support for CS5535/CS5536 (AMD Geode companion chip)"
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depends on MTD_NAND && X86_32 && (X86_PC || X86_GENERICARCH)
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|
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@ -6,6 +6,7 @@
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obj-$(CONFIG_MTD_NAND) += nand.o nand_ecc.o
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obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o
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obj-$(CONFIG_MTD_NAND_CAFE) += cafe_nand.o
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obj-$(CONFIG_MTD_NAND_SPIA) += spia.o
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obj-$(CONFIG_MTD_NAND_AMS_DELTA) += ams-delta.o
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obj-$(CONFIG_MTD_NAND_TOTO) += toto.o
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@ -0,0 +1,698 @@
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/*
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* cafe_nand.c
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*
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* Copyright © 2006 Red Hat, Inc.
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* Copyright © 2006 David Woodhouse <dwmw2@infradead.org>
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*/
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#define DEBUG
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#include <linux/device.h>
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#undef DEBUG
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <asm/io.h>
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#define CAFE_NAND_CTRL1 0x00
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#define CAFE_NAND_CTRL2 0x04
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#define CAFE_NAND_CTRL3 0x08
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#define CAFE_NAND_STATUS 0x0c
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#define CAFE_NAND_IRQ 0x10
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#define CAFE_NAND_IRQ_MASK 0x14
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#define CAFE_NAND_DATA_LEN 0x18
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#define CAFE_NAND_ADDR1 0x1c
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#define CAFE_NAND_ADDR2 0x20
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#define CAFE_NAND_TIMING1 0x24
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#define CAFE_NAND_TIMING2 0x28
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#define CAFE_NAND_TIMING3 0x2c
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#define CAFE_NAND_NONMEM 0x30
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#define CAFE_NAND_DMA_CTRL 0x40
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#define CAFE_NAND_DMA_ADDR0 0x44
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#define CAFE_NAND_DMA_ADDR1 0x48
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#define CAFE_NAND_READ_DATA 0x1000
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#define CAFE_NAND_WRITE_DATA 0x2000
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struct cafe_priv {
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struct nand_chip nand;
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struct pci_dev *pdev;
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void __iomem *mmio;
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uint32_t ctl1;
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uint32_t ctl2;
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int datalen;
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int nr_data;
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int data_pos;
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int page_addr;
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dma_addr_t dmaaddr;
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unsigned char *dmabuf;
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};
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static int usedma = 1;
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module_param(usedma, int, 0644);
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static int skipbbt = 0;
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module_param(skipbbt, int, 0644);
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static int debug = 0;
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module_param(debug, int, 0644);
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#define cafe_dev_dbg(dev, args...) do { if (debug) dev_dbg(dev, ##args); } while(0)
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static int cafe_device_ready(struct mtd_info *mtd)
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{
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struct cafe_priv *cafe = mtd->priv;
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int result = !!(readl(cafe->mmio + CAFE_NAND_STATUS) | 0x40000000);
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uint32_t irqs = readl(cafe->mmio + CAFE_NAND_IRQ);
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writel(irqs, cafe->mmio+CAFE_NAND_IRQ);
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cafe_dev_dbg(&cafe->pdev->dev, "NAND device is%s ready, IRQ %x (%x) (%x,%x)\n",
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result?"":" not", irqs, readl(cafe->mmio + CAFE_NAND_IRQ),
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readl(cafe->mmio + 0x3008), readl(cafe->mmio + 0x300c));
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return result;
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}
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static void cafe_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
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{
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struct cafe_priv *cafe = mtd->priv;
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if (usedma)
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memcpy(cafe->dmabuf + cafe->datalen, buf, len);
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else
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memcpy_toio(cafe->mmio + CAFE_NAND_WRITE_DATA + cafe->datalen, buf, len);
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cafe->datalen += len;
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cafe_dev_dbg(&cafe->pdev->dev, "Copy 0x%x bytes to write buffer. datalen 0x%x\n",
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len, cafe->datalen);
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}
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static void cafe_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
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{
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struct cafe_priv *cafe = mtd->priv;
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if (usedma)
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memcpy(buf, cafe->dmabuf + cafe->datalen, len);
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else
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memcpy_fromio(buf, cafe->mmio + CAFE_NAND_READ_DATA + cafe->datalen, len);
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cafe_dev_dbg(&cafe->pdev->dev, "Copy 0x%x bytes from position 0x%x in read buffer.\n",
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len, cafe->datalen);
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cafe->datalen += len;
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}
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static uint8_t cafe_read_byte(struct mtd_info *mtd)
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{
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struct cafe_priv *cafe = mtd->priv;
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uint8_t d;
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cafe_read_buf(mtd, &d, 1);
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cafe_dev_dbg(&cafe->pdev->dev, "Read %02x\n", d);
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return d;
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}
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static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command,
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int column, int page_addr)
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{
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struct cafe_priv *cafe = mtd->priv;
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int adrbytes = 0;
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uint32_t ctl1;
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uint32_t doneint = 0x80000000;
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int i;
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cafe_dev_dbg(&cafe->pdev->dev, "cmdfunc %02x, 0x%x, 0x%x\n",
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command, column, page_addr);
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if (command == NAND_CMD_ERASE2 || command == NAND_CMD_PAGEPROG) {
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/* Second half of a command we already calculated */
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writel(cafe->ctl2 | 0x100 | command, cafe->mmio + 0x04);
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ctl1 = cafe->ctl1;
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cafe_dev_dbg(&cafe->pdev->dev, "Continue command, ctl1 %08x, #data %d\n",
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cafe->ctl1, cafe->nr_data);
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goto do_command;
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}
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/* Reset ECC engine */
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writel(0, cafe->mmio + CAFE_NAND_CTRL2);
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/* Emulate NAND_CMD_READOOB on large-page chips */
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if (mtd->writesize > 512 &&
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command == NAND_CMD_READOOB) {
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column += mtd->writesize;
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command = NAND_CMD_READ0;
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}
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/* FIXME: Do we need to send read command before sending data
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for small-page chips, to position the buffer correctly? */
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if (column != -1) {
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writel(column, cafe->mmio + 0x1c);
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adrbytes = 2;
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if (page_addr != -1)
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goto write_adr2;
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} else if (page_addr != -1) {
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writel(page_addr & 0xffff, cafe->mmio + 0x1c);
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page_addr >>= 16;
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write_adr2:
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writel(page_addr, cafe->mmio+0x20);
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adrbytes += 2;
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if (mtd->size > mtd->writesize << 16)
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adrbytes++;
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}
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cafe->data_pos = cafe->datalen = 0;
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/* Set command valid bit */
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ctl1 = 0x80000000 | command;
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/* Set RD or WR bits as appropriate */
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if (command == NAND_CMD_READID || command == NAND_CMD_STATUS) {
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ctl1 |= (1<<26); /* rd */
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/* Always 5 bytes, for now */
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cafe->datalen = 4;
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/* And one address cycle -- even for STATUS, since the controller doesn't work without */
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adrbytes = 1;
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} else if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 ||
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command == NAND_CMD_READOOB || command == NAND_CMD_RNDOUT) {
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ctl1 |= 1<<26; /* rd */
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/* For now, assume just read to end of page */
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cafe->datalen = mtd->writesize + mtd->oobsize - column;
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} else if (command == NAND_CMD_SEQIN)
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ctl1 |= 1<<25; /* wr */
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/* Set number of address bytes */
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if (adrbytes)
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ctl1 |= ((adrbytes-1)|8) << 27;
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if (command == NAND_CMD_SEQIN || command == NAND_CMD_ERASE1) {
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/* Ignore the first command of a pair; the hardware
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deals with them both at once, later */
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cafe->ctl1 = ctl1;
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cafe->ctl2 = 0;
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cafe_dev_dbg(&cafe->pdev->dev, "Setup for delayed command, ctl1 %08x, dlen %x\n",
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cafe->ctl1, cafe->datalen);
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return;
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}
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/* RNDOUT and READ0 commands need a following byte */
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if (command == NAND_CMD_RNDOUT)
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writel(cafe->ctl2 | 0x100 | NAND_CMD_RNDOUTSTART, cafe->mmio + CAFE_NAND_CTRL2);
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else if (command == NAND_CMD_READ0 && mtd->writesize > 512)
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writel(cafe->ctl2 | 0x100 | NAND_CMD_READSTART, cafe->mmio + CAFE_NAND_CTRL2);
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do_command:
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// ECC on read only works if we ...
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// if (cafe->datalen == 2112)
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// cafe->datalen = 2062;
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cafe_dev_dbg(&cafe->pdev->dev, "dlen %x, ctl1 %x, ctl2 %x\n",
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cafe->datalen, ctl1, readl(cafe->mmio+CAFE_NAND_CTRL2));
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/* NB: The datasheet lies -- we really should be subtracting 1 here */
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writel(cafe->datalen, cafe->mmio + CAFE_NAND_DATA_LEN);
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writel(0x90000000, cafe->mmio + CAFE_NAND_IRQ);
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if (usedma && (ctl1 & (3<<25))) {
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uint32_t dmactl = 0xc0000000 + cafe->datalen;
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/* If WR or RD bits set, set up DMA */
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if (ctl1 & (1<<26)) {
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/* It's a read */
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dmactl |= (1<<29);
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/* ... so it's done when the DMA is done, not just
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the command. */
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doneint = 0x10000000;
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}
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writel(dmactl, cafe->mmio + 0x40);
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}
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#if 0
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printk("DMA setup is %x, status %x, ctl1 %x\n", readl(cafe->mmio + 0x40), readl(cafe->mmio + 0x0c), readl(cafe->mmio));
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printk("DMA setup is %x, status %x, ctl1 %x\n", readl(cafe->mmio + 0x40), readl(cafe->mmio + 0x0c), readl(cafe->mmio));
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#endif
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cafe->datalen = 0;
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#if 0
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printk("About to write command %08x\n", ctl1);
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for (i=0; i< 0x5c; i+=4)
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printk("Register %x: %08x\n", i, readl(cafe->mmio + i));
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#endif
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||||
writel(ctl1, cafe->mmio + CAFE_NAND_CTRL1);
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||||
/* Apply this short delay always to ensure that we do wait tWB in
|
||||
* any case on any machine. */
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||||
ndelay(100);
|
||||
|
||||
if (1) {
|
||||
int c = 500000;
|
||||
uint32_t irqs;
|
||||
|
||||
while (c--) {
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||||
irqs = readl(cafe->mmio + CAFE_NAND_IRQ);
|
||||
if (irqs & doneint)
|
||||
break;
|
||||
udelay(1);
|
||||
if (!(c % 100000))
|
||||
cafe_dev_dbg(&cafe->pdev->dev, "Wait for ready, IRQ %x\n", irqs);
|
||||
cpu_relax();
|
||||
}
|
||||
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));
|
||||
}
|
||||
|
||||
|
||||
cafe->ctl2 &= ~(1<<8);
|
||||
cafe->ctl2 &= ~(1<<30);
|
||||
|
||||
switch (command) {
|
||||
|
||||
case NAND_CMD_CACHEDPROG:
|
||||
case NAND_CMD_PAGEPROG:
|
||||
case NAND_CMD_ERASE1:
|
||||
case NAND_CMD_ERASE2:
|
||||
case NAND_CMD_SEQIN:
|
||||
case NAND_CMD_RNDIN:
|
||||
case NAND_CMD_STATUS:
|
||||
case NAND_CMD_DEPLETE1:
|
||||
case NAND_CMD_RNDOUT:
|
||||
case NAND_CMD_STATUS_ERROR:
|
||||
case NAND_CMD_STATUS_ERROR0:
|
||||
case NAND_CMD_STATUS_ERROR1:
|
||||
case NAND_CMD_STATUS_ERROR2:
|
||||
case NAND_CMD_STATUS_ERROR3:
|
||||
writel(cafe->ctl2, cafe->mmio + CAFE_NAND_CTRL2);
|
||||
return;
|
||||
}
|
||||
nand_wait_ready(mtd);
|
||||
writel(cafe->ctl2, cafe->mmio + CAFE_NAND_CTRL2);
|
||||
}
|
||||
|
||||
static void cafe_select_chip(struct mtd_info *mtd, int chipnr)
|
||||
{
|
||||
//struct cafe_priv *cafe = mtd->priv;
|
||||
// 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 + CAFE_NAND_IRQ);
|
||||
writel(irqs & ~0x90000000, cafe->mmio + CAFE_NAND_IRQ);
|
||||
if (!irqs)
|
||||
return IRQ_NONE;
|
||||
|
||||
cafe_dev_dbg(&cafe->pdev->dev, "irq, bits %x (%x)\n", irqs, readl(cafe->mmio + CAFE_NAND_IRQ));
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void cafe_nand_bug(struct mtd_info *mtd)
|
||||
{
|
||||
BUG();
|
||||
}
|
||||
|
||||
static int cafe_nand_write_oob(struct mtd_info *mtd,
|
||||
struct nand_chip *chip, int page)
|
||||
{
|
||||
int status = 0;
|
||||
|
||||
WARN_ON(chip->oob_poi != chip->buffers->oobwbuf);
|
||||
|
||||
chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
|
||||
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
|
||||
chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
|
||||
status = chip->waitfunc(mtd, chip);
|
||||
|
||||
return status & NAND_STATUS_FAIL ? -EIO : 0;
|
||||
}
|
||||
|
||||
/* Don't use -- use nand_read_oob_std for now */
|
||||
static int cafe_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
|
||||
int page, int sndcmd)
|
||||
{
|
||||
chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
|
||||
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
|
||||
return 1;
|
||||
}
|
||||
/**
|
||||
* cafe_nand_read_page_syndrome - {REPLACABLE] hardware ecc syndrom based page read
|
||||
* @mtd: mtd info structure
|
||||
* @chip: nand chip info structure
|
||||
* @buf: buffer to store read data
|
||||
*
|
||||
* The hw generator calculates the error syndrome automatically. Therefor
|
||||
* we need a special oob layout and handling.
|
||||
*/
|
||||
static int cafe_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
|
||||
uint8_t *buf)
|
||||
{
|
||||
struct cafe_priv *cafe = mtd->priv;
|
||||
|
||||
WARN_ON(chip->oob_poi != chip->buffers->oobrbuf);
|
||||
|
||||
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);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
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)
|
||||
{
|
||||
struct cafe_priv *cafe = mtd->priv;
|
||||
|
||||
WARN_ON(chip->oob_poi != chip->buffers->oobwbuf);
|
||||
|
||||
chip->write_buf(mtd, buf, mtd->writesize);
|
||||
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
|
||||
|
||||
/* Set up ECC autogeneration */
|
||||
cafe->ctl2 |= (1<<27) | (1<<30);
|
||||
if (mtd->writesize == 2048)
|
||||
cafe->ctl2 |= (1<<29);
|
||||
}
|
||||
|
||||
static int cafe_nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
|
||||
const uint8_t *buf, int page, int cached, int raw)
|
||||
{
|
||||
int status;
|
||||
|
||||
WARN_ON(chip->oob_poi != chip->buffers->oobwbuf);
|
||||
|
||||
chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
|
||||
|
||||
if (unlikely(raw))
|
||||
chip->ecc.write_page_raw(mtd, chip, buf);
|
||||
else
|
||||
chip->ecc.write_page(mtd, chip, buf);
|
||||
|
||||
/*
|
||||
* Cached progamming disabled for now, Not sure if its worth the
|
||||
* trouble. The speed gain is not very impressive. (2.3->2.6Mib/s)
|
||||
*/
|
||||
cached = 0;
|
||||
|
||||
if (!cached || !(chip->options & NAND_CACHEPRG)) {
|
||||
|
||||
chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
|
||||
status = chip->waitfunc(mtd, chip);
|
||||
/*
|
||||
* See if operation failed and additional status checks are
|
||||
* available
|
||||
*/
|
||||
if ((status & NAND_STATUS_FAIL) && (chip->errstat))
|
||||
status = chip->errstat(mtd, chip, FL_WRITING, status,
|
||||
page);
|
||||
|
||||
if (status & NAND_STATUS_FAIL)
|
||||
return -EIO;
|
||||
} else {
|
||||
chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1);
|
||||
status = chip->waitfunc(mtd, chip);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_MTD_NAND_VERIFY_WRITE
|
||||
/* Send command to read back the data */
|
||||
chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
|
||||
|
||||
if (chip->verify_buf(mtd, buf, mtd->writesize))
|
||||
return -EIO;
|
||||
#endif
|
||||
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)
|
||||
{
|
||||
struct mtd_info *mtd;
|
||||
struct cafe_priv *cafe;
|
||||
uint32_t ctrl;
|
||||
int err = 0;
|
||||
|
||||
err = pci_enable_device(pdev);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
pci_set_master(pdev);
|
||||
|
||||
mtd = kzalloc(sizeof(*mtd) + sizeof(struct cafe_priv), GFP_KERNEL);
|
||||
if (!mtd) {
|
||||
dev_warn(&pdev->dev, "failed to alloc mtd_info\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
cafe = (void *)(&mtd[1]);
|
||||
|
||||
mtd->priv = cafe;
|
||||
mtd->owner = THIS_MODULE;
|
||||
|
||||
cafe->pdev = pdev;
|
||||
cafe->mmio = pci_iomap(pdev, 0, 0);
|
||||
if (!cafe->mmio) {
|
||||
dev_warn(&pdev->dev, "failed to iomap\n");
|
||||
err = -ENOMEM;
|
||||
goto out_free_mtd;
|
||||
}
|
||||
cafe->dmabuf = dma_alloc_coherent(&cafe->pdev->dev, 2112 + sizeof(struct nand_buffers),
|
||||
&cafe->dmaaddr, GFP_KERNEL);
|
||||
if (!cafe->dmabuf) {
|
||||
err = -ENOMEM;
|
||||
goto out_ior;
|
||||
}
|
||||
cafe->nand.buffers = (void *)cafe->dmabuf + 2112;
|
||||
|
||||
cafe->nand.cmdfunc = cafe_nand_cmdfunc;
|
||||
cafe->nand.dev_ready = cafe_device_ready;
|
||||
cafe->nand.read_byte = cafe_read_byte;
|
||||
cafe->nand.read_buf = cafe_read_buf;
|
||||
cafe->nand.write_buf = cafe_write_buf;
|
||||
cafe->nand.select_chip = cafe_select_chip;
|
||||
|
||||
cafe->nand.chip_delay = 0;
|
||||
|
||||
/* 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);
|
||||
#if 1
|
||||
writel(0x01010a0a, cafe->mmio + CAFE_NAND_TIMING1);
|
||||
writel(0x24121212, cafe->mmio + CAFE_NAND_TIMING2);
|
||||
writel(0x11000000, cafe->mmio + CAFE_NAND_TIMING3);
|
||||
#else
|
||||
writel(0xffffffff, cafe->mmio + CAFE_NAND_TIMING1);
|
||||
writel(0xffffffff, cafe->mmio + CAFE_NAND_TIMING2);
|
||||
writel(0xffffffff, cafe->mmio + CAFE_NAND_TIMING3);
|
||||
#endif
|
||||
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);
|
||||
|
||||
goto out_free_dma;
|
||||
}
|
||||
#if 1
|
||||
/* Disable master reset, enable NAND clock */
|
||||
ctrl = readl(cafe->mmio + 0x3004);
|
||||
ctrl &= 0xffffeff0;
|
||||
ctrl |= 0x00007000;
|
||||
writel(ctrl | 0x05, cafe->mmio + 0x3004);
|
||||
writel(ctrl | 0x0a, cafe->mmio + 0x3004);
|
||||
writel(0, cafe->mmio + 0x40);
|
||||
|
||||
writel(0x7006, cafe->mmio + 0x3004);
|
||||
writel(0x700a, cafe->mmio + 0x3004);
|
||||
|
||||
/* Set up DMA address */
|
||||
writel(cafe->dmaaddr & 0xffffffff, cafe->mmio + 0x44);
|
||||
if (sizeof(cafe->dmaaddr) > 4)
|
||||
writel((cafe->dmaaddr >> 16) >> 16, cafe->mmio + 0x48);
|
||||
else
|
||||
writel(0, cafe->mmio + 0x48);
|
||||
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);
|
||||
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, 0x5a, 2112);
|
||||
cafe->nand.cmdfunc(mtd, NAND_CMD_READID, 0, -1);
|
||||
cafe->nand.read_byte(mtd);
|
||||
cafe->nand.read_byte(mtd);
|
||||
cafe->nand.read_byte(mtd);
|
||||
cafe->nand.read_byte(mtd);
|
||||
cafe->nand.read_byte(mtd);
|
||||
#endif
|
||||
#if 0
|
||||
cafe->nand.cmdfunc(mtd, NAND_CMD_READ0, 0, 0);
|
||||
// nand_wait_ready(mtd);
|
||||
cafe->nand.read_byte(mtd);
|
||||
cafe->nand.read_byte(mtd);
|
||||
cafe->nand.read_byte(mtd);
|
||||
cafe->nand.read_byte(mtd);
|
||||
#endif
|
||||
#if 0
|
||||
writel(0x84600070, cafe->mmio);
|
||||
udelay(10);
|
||||
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)) {
|
||||
err = -ENXIO;
|
||||
goto out_irq;
|
||||
}
|
||||
|
||||
cafe->ctl2 = 1<<27; /* Reed-Solomon ECC */
|
||||
if (mtd->writesize == 2048)
|
||||
cafe->ctl2 |= 1<<29; /* 2KiB page size */
|
||||
|
||||
/* Set up ECC according to the type of chip we found */
|
||||
if (mtd->writesize == 512 || mtd->writesize == 2048) {
|
||||
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;
|
||||
cafe->nand.write_page = cafe_nand_write_page;
|
||||
cafe->nand.ecc.write_page = cafe_nand_write_page_lowlevel;
|
||||
cafe->nand.ecc.write_oob = cafe_nand_write_oob;
|
||||
cafe->nand.ecc.read_page = cafe_nand_read_page;
|
||||
cafe->nand.ecc.read_oob = cafe_nand_read_oob;
|
||||
|
||||
} else {
|
||||
printk(KERN_WARNING "Unexpected NAND flash writesize %d. Using software ECC\n",
|
||||
mtd->writesize);
|
||||
cafe->nand.ecc.mode = NAND_ECC_NONE;
|
||||
}
|
||||
|
||||
err = nand_scan_tail(mtd);
|
||||
if (err)
|
||||
goto out_irq;
|
||||
|
||||
pci_set_drvdata(pdev, mtd);
|
||||
add_mtd_device(mtd);
|
||||
goto out;
|
||||
|
||||
out_irq:
|
||||
/* Disable NAND IRQ in global IRQ mask register */
|
||||
writel(~1 & readl(cafe->mmio + 0x300c), cafe->mmio + 0x300c);
|
||||
free_irq(pdev->irq, mtd);
|
||||
out_free_dma:
|
||||
dma_free_coherent(&cafe->pdev->dev, 2112, cafe->dmabuf, cafe->dmaaddr);
|
||||
out_ior:
|
||||
pci_iounmap(pdev, cafe->mmio);
|
||||
out_free_mtd:
|
||||
kfree(mtd);
|
||||
out:
|
||||
return err;
|
||||
}
|
||||
|
||||
static void __devexit cafe_nand_remove(struct pci_dev *pdev)
|
||||
{
|
||||
struct mtd_info *mtd = pci_get_drvdata(pdev);
|
||||
struct cafe_priv *cafe = mtd->priv;
|
||||
|
||||
del_mtd_device(mtd);
|
||||
/* Disable NAND IRQ in global IRQ mask register */
|
||||
writel(~1 & readl(cafe->mmio + 0x300c), cafe->mmio + 0x300c);
|
||||
free_irq(pdev->irq, mtd);
|
||||
nand_release(mtd);
|
||||
pci_iounmap(pdev, cafe->mmio);
|
||||
dma_free_coherent(&cafe->pdev->dev, 2112, cafe->dmabuf, cafe->dmaaddr);
|
||||
kfree(mtd);
|
||||
}
|
||||
|
||||
static struct pci_device_id cafe_nand_tbl[] = {
|
||||
{ 0x11ab, 0x4100, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_MEMORY_FLASH << 8, 0xFFFF0 }
|
||||
};
|
||||
|
||||
MODULE_DEVICE_TABLE(pci, cafe_nand_tbl);
|
||||
|
||||
static struct pci_driver cafe_nand_pci_driver = {
|
||||
.name = "CAFÉ NAND",
|
||||
.id_table = cafe_nand_tbl,
|
||||
.probe = cafe_nand_probe,
|
||||
.remove = __devexit_p(cafe_nand_remove),
|
||||
#ifdef CONFIG_PMx
|
||||
.suspend = cafe_nand_suspend,
|
||||
.resume = cafe_nand_resume,
|
||||
#endif
|
||||
};
|
||||
|
||||
static int cafe_nand_init(void)
|
||||
{
|
||||
return pci_register_driver(&cafe_nand_pci_driver);
|
||||
}
|
||||
|
||||
static void cafe_nand_exit(void)
|
||||
{
|
||||
pci_unregister_driver(&cafe_nand_pci_driver);
|
||||
}
|
||||
module_init(cafe_nand_init);
|
||||
module_exit(cafe_nand_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
|
||||
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
|
||||
*/
|
||||
Loading…
Reference in New Issue