785 lines
22 KiB
C
785 lines
22 KiB
C
/*
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* Driver for One Laptop Per Child ‘CAFÉ’ controller, aka Marvell 88ALP01
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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_ECC_RESULT 0x3C
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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_ECC_SYN01 0x50
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#define CAFE_NAND_ECC_SYN23 0x54
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#define CAFE_NAND_ECC_SYN45 0x58
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#define CAFE_NAND_ECC_SYN67 0x5c
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#define CAFE_NAND_READ_DATA 0x1000
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#define CAFE_NAND_WRITE_DATA 0x2000
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int cafe_correct_ecc(unsigned char *buf,
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unsigned short *chk_syndrome_list);
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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 = 0;
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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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static int checkecc = 0;
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module_param(checkecc, int, 0644);
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/* Hrm. Why isn't this already conditional on something in the struct device? */
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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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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 + CAFE_NAND_CTRL2);
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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 + CAFE_NAND_ADDR1);
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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 + CAFE_NAND_ADDR1);
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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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#if 0
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/* http://dev.laptop.org/ticket/200
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ECC on read only works if we read precisely 0x80e bytes */
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if (cafe->datalen == 2112)
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cafe->datalen = 2062;
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#endif
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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 + CAFE_NAND_DMA_CTRL);
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}
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cafe->datalen = 0;
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#if 0
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{ int i;
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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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}
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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
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* any case on any machine. */
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ndelay(100);
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if (1) {
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int c = 500000;
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uint32_t irqs;
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while (c--) {
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irqs = readl(cafe->mmio + CAFE_NAND_IRQ);
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if (irqs & doneint)
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break;
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udelay(1);
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if (!(c % 100000))
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cafe_dev_dbg(&cafe->pdev->dev, "Wait for ready, IRQ %x\n", irqs);
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cpu_relax();
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}
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writel(doneint, cafe->mmio + CAFE_NAND_IRQ);
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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));
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}
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cafe->ctl2 &= ~(1<<8);
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cafe->ctl2 &= ~(1<<30);
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switch (command) {
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case NAND_CMD_CACHEDPROG:
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case NAND_CMD_PAGEPROG:
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case NAND_CMD_ERASE1:
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case NAND_CMD_ERASE2:
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case NAND_CMD_SEQIN:
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case NAND_CMD_RNDIN:
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case NAND_CMD_STATUS:
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case NAND_CMD_DEPLETE1:
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case NAND_CMD_RNDOUT:
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case NAND_CMD_STATUS_ERROR:
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case NAND_CMD_STATUS_ERROR0:
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case NAND_CMD_STATUS_ERROR1:
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case NAND_CMD_STATUS_ERROR2:
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case NAND_CMD_STATUS_ERROR3:
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writel(cafe->ctl2, cafe->mmio + CAFE_NAND_CTRL2);
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return;
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}
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nand_wait_ready(mtd);
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writel(cafe->ctl2, cafe->mmio + CAFE_NAND_CTRL2);
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}
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static void cafe_select_chip(struct mtd_info *mtd, int chipnr)
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{
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//struct cafe_priv *cafe = mtd->priv;
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// cafe_dev_dbg(&cafe->pdev->dev, "select_chip %d\n", chipnr);
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}
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static int cafe_nand_interrupt(int irq, void *id, struct pt_regs *regs)
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{
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struct mtd_info *mtd = id;
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struct cafe_priv *cafe = mtd->priv;
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uint32_t irqs = readl(cafe->mmio + CAFE_NAND_IRQ);
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writel(irqs & ~0x90000000, cafe->mmio + CAFE_NAND_IRQ);
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if (!irqs)
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return IRQ_NONE;
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cafe_dev_dbg(&cafe->pdev->dev, "irq, bits %x (%x)\n", irqs, readl(cafe->mmio + CAFE_NAND_IRQ));
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return IRQ_HANDLED;
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}
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static void cafe_nand_bug(struct mtd_info *mtd)
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{
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BUG();
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}
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static int cafe_nand_write_oob(struct mtd_info *mtd,
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struct nand_chip *chip, int page)
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{
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int status = 0;
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chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
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chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
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chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
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status = chip->waitfunc(mtd, chip);
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return status & NAND_STATUS_FAIL ? -EIO : 0;
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}
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/* Don't use -- use nand_read_oob_std for now */
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static int cafe_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
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int page, int sndcmd)
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{
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chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
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chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
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return 1;
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}
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/**
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* cafe_nand_read_page_syndrome - {REPLACABLE] hardware ecc syndrom based page read
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* @mtd: mtd info structure
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* @chip: nand chip info structure
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* @buf: buffer to store read data
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*
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* The hw generator calculates the error syndrome automatically. Therefor
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* we need a special oob layout and handling.
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*/
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static unsigned short cafe_empty_syndromes[8] = { 4095, 748, 2629, 2920, 875, 1454, 51, 1456 };
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static int is_all_ff(unsigned char *buf, int len)
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{
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unsigned long *lbuf = (void *)buf;
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int i;
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for (i=0; i < (len/sizeof(long)); i++) {
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if (lbuf[i] != ~0UL)
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return 0;
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}
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i *= sizeof(long);
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for (; i< len; i++) {
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if (buf[i] != 0xff)
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return 0;
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}
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return 1;
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}
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static int cafe_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
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uint8_t *buf)
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{
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struct cafe_priv *cafe = mtd->priv;
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cafe_dev_dbg(&cafe->pdev->dev, "ECC result %08x SYN1,2 %08x\n",
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readl(cafe->mmio + CAFE_NAND_ECC_RESULT),
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readl(cafe->mmio + CAFE_NAND_ECC_SYN01));
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chip->read_buf(mtd, buf, mtd->writesize);
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chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
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if (checkecc && readl(cafe->mmio + CAFE_NAND_ECC_RESULT) & (1<<18)) {
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unsigned short syn[8];
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int i;
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for (i=0; i<8; i+=2) {
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uint32_t tmp = readl(cafe->mmio + CAFE_NAND_ECC_SYN01 + (i*2));
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syn[i] = tmp & 0xfff;
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syn[i+1] = (tmp >> 16) & 0xfff;
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}
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/* FIXME: http://dev.laptop.org/ticket/215 */
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if (!memcmp(syn, cafe_empty_syndromes, sizeof(syn))
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&& is_all_ff(chip->oob_poi, 14)
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&& is_all_ff(buf, mtd->writesize)) {
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dev_dbg(&cafe->pdev->dev, "ECC error reported on empty block\n");
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/* It was an empty block. Nothing to fix here except the hardware */
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} else if ((i = cafe_correct_ecc(buf, syn)) < 0) {
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dev_dbg(&cafe->pdev->dev, "Failed to correct ECC\n");
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mtd->ecc_stats.failed++;
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} else {
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dev_dbg(&cafe->pdev->dev, "Corrected %d symbol errors\n", i);
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mtd->ecc_stats.corrected += i;
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}
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}
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return 0;
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}
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static struct nand_ecclayout cafe_oobinfo_2048 = {
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.eccbytes = 14,
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.eccpos = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13},
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.oobfree = {{14, 50}}
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};
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/* Ick. The BBT code really ought to be able to work this bit out
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for itself from the above, at least for the 2KiB case */
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static uint8_t cafe_bbt_pattern_2048[] = { 'B', 'b', 't', '0' };
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static uint8_t cafe_mirror_pattern_2048[] = { '1', 't', 'b', 'B' };
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static uint8_t cafe_bbt_pattern_512[] = { 0xBB };
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static uint8_t cafe_mirror_pattern_512[] = { 0xBC };
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static struct nand_bbt_descr cafe_bbt_main_descr_2048 = {
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.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
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| NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
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.offs = 14,
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.len = 4,
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.veroffs = 18,
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.maxblocks = 4,
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.pattern = cafe_bbt_pattern_2048
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};
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static struct nand_bbt_descr cafe_bbt_mirror_descr_2048 = {
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.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
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| NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
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.offs = 14,
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.len = 4,
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.veroffs = 18,
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.maxblocks = 4,
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.pattern = cafe_mirror_pattern_2048
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};
|
||
|
||
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 struct nand_bbt_descr cafe_bbt_main_descr_512 = {
|
||
.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
|
||
| NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
|
||
.offs = 14,
|
||
.len = 1,
|
||
.veroffs = 15,
|
||
.maxblocks = 4,
|
||
.pattern = cafe_bbt_pattern_512
|
||
};
|
||
|
||
static struct nand_bbt_descr cafe_bbt_mirror_descr_512 = {
|
||
.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
|
||
| NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
|
||
.offs = 14,
|
||
.len = 1,
|
||
.veroffs = 15,
|
||
.maxblocks = 4,
|
||
.pattern = cafe_mirror_pattern_512
|
||
};
|
||
|
||
|
||
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;
|
||
|
||
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;
|
||
|
||
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 + CAFE_NAND_DMA_CTRL);
|
||
|
||
writel(0x7006, cafe->mmio + 0x3004);
|
||
writel(0x700a, cafe->mmio + 0x3004);
|
||
|
||
/* Set up DMA address */
|
||
writel(cafe->dmaaddr & 0xffffffff, cafe->mmio + CAFE_NAND_DMA_ADDR0);
|
||
if (sizeof(cafe->dmaaddr) > 4)
|
||
/* Shift in two parts to shut the compiler up */
|
||
writel((cafe->dmaaddr >> 16) >> 16, cafe->mmio + CAFE_NAND_DMA_ADDR1);
|
||
else
|
||
writel(0, cafe->mmio + CAFE_NAND_DMA_ADDR1);
|
||
|
||
cafe_dev_dbg(&cafe->pdev->dev, "Set DMA address to %x (virt %p)\n",
|
||
readl(cafe->mmio + CAFE_NAND_DMA_ADDR0), 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 == 2048) {
|
||
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;
|
||
} else if (mtd->writesize == 512) {
|
||
cafe->nand.ecc.layout = &cafe_oobinfo_512;
|
||
cafe->nand.bbt_td = &cafe_bbt_main_descr_512;
|
||
cafe->nand.bbt_md = &cafe_bbt_mirror_descr_512;
|
||
} else {
|
||
printk(KERN_WARNING "Unexpected NAND flash writesize %d. Aborting\n",
|
||
mtd->writesize);
|
||
goto out_irq;
|
||
}
|
||
cafe->nand.ecc.mode = NAND_ECC_HW_SYNDROME;
|
||
cafe->nand.ecc.size = mtd->writesize;
|
||
cafe->nand.ecc.bytes = 14;
|
||
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;
|
||
|
||
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
|
||
*/
|