#include <asm/mach/flash.h>
#include <mach/mxc_nand.h>
+#include <mach/hardware.h>
#define DRIVER_NAME "mxc_nand"
+#define nfc_is_v21() (cpu_is_mx25() || cpu_is_mx35())
+#define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27())
+
/* Addresses for NFC registers */
#define NFC_BUF_SIZE 0xE00
#define NFC_BUF_ADDR 0xE04
#define NFC_RSLTMAIN_AREA 0xE0E
#define NFC_RSLTSPARE_AREA 0xE10
#define NFC_WRPROT 0xE12
-#define NFC_UNLOCKSTART_BLKADDR 0xE14
-#define NFC_UNLOCKEND_BLKADDR 0xE16
+#define NFC_V1_UNLOCKSTART_BLKADDR 0xe14
+#define NFC_V1_UNLOCKEND_BLKADDR 0xe16
+#define NFC_V21_UNLOCKSTART_BLKADDR 0xe20
+#define NFC_V21_UNLOCKEND_BLKADDR 0xe22
#define NFC_NF_WRPRST 0xE18
#define NFC_CONFIG1 0xE1A
#define NFC_CONFIG2 0xE1C
-/* Addresses for NFC RAM BUFFER Main area 0 */
-#define MAIN_AREA0 0x000
-#define MAIN_AREA1 0x200
-#define MAIN_AREA2 0x400
-#define MAIN_AREA3 0x600
-
-/* Addresses for NFC SPARE BUFFER Spare area 0 */
-#define SPARE_AREA0 0x800
-#define SPARE_AREA1 0x810
-#define SPARE_AREA2 0x820
-#define SPARE_AREA3 0x830
-
/* Set INT to 0, FCMD to 1, rest to 0 in NFC_CONFIG2 Register
* for Command operation */
#define NFC_CMD 0x1
struct mtd_partition *parts;
struct device *dev;
+ void *spare0;
+ void *main_area0;
+ void *main_area1;
+
+ void __iomem *base;
void __iomem *regs;
int status_request;
- int pagesize_2k;
struct clk *clk;
int clk_act;
int irq;
int spare_len;
};
-/* Define delays in microsec for NAND device operations */
-#define TROP_US_DELAY 2000
-/* Macros to get byte and bit positions of ECC */
-#define COLPOS(x) ((x) >> 3)
-#define BITPOS(x) ((x) & 0xf)
-
-/* Define single bit Error positions in Main & Spare area */
-#define MAIN_SINGLEBIT_ERROR 0x4
-#define SPARE_SINGLEBIT_ERROR 0x1
-
/* OOB placement block for use with hardware ecc generation */
-static struct nand_ecclayout nand_hw_eccoob_smallpage = {
+static struct nand_ecclayout nandv1_hw_eccoob_smallpage = {
.eccbytes = 5,
.eccpos = {6, 7, 8, 9, 10},
.oobfree = {{0, 5}, {12, 4}, }
};
-static struct nand_ecclayout nand_hw_eccoob_largepage = {
+static struct nand_ecclayout nandv1_hw_eccoob_largepage = {
.eccbytes = 20,
.eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
.oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, }
};
+/* OOB description for 512 byte pages with 16 byte OOB */
+static struct nand_ecclayout nandv2_hw_eccoob_smallpage = {
+ .eccbytes = 1 * 9,
+ .eccpos = {
+ 7, 8, 9, 10, 11, 12, 13, 14, 15
+ },
+ .oobfree = {
+ {.offset = 0, .length = 5}
+ }
+};
+
+/* OOB description for 2048 byte pages with 64 byte OOB */
+static struct nand_ecclayout nandv2_hw_eccoob_largepage = {
+ .eccbytes = 4 * 9,
+ .eccpos = {
+ 7, 8, 9, 10, 11, 12, 13, 14, 15,
+ 23, 24, 25, 26, 27, 28, 29, 30, 31,
+ 39, 40, 41, 42, 43, 44, 45, 46, 47,
+ 55, 56, 57, 58, 59, 60, 61, 62, 63
+ },
+ .oobfree = {
+ {.offset = 2, .length = 4},
+ {.offset = 16, .length = 7},
+ {.offset = 32, .length = 7},
+ {.offset = 48, .length = 7}
+ }
+};
+
#ifdef CONFIG_MTD_PARTITIONS
static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL };
#endif
/* This function polls the NANDFC to wait for the basic operation to
* complete by checking the INT bit of config2 register.
*/
-static void wait_op_done(struct mxc_nand_host *host, int max_retries,
- int useirq)
+static void wait_op_done(struct mxc_nand_host *host, int useirq)
{
uint32_t tmp;
+ int max_retries = 2000;
if (useirq) {
if ((readw(host->regs + NFC_CONFIG2) & NFC_INT) == 0) {
writew(NFC_CMD, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, useirq);
+ wait_op_done(host, useirq);
}
/* This function sends an address (or partial address) to the
writew(NFC_ADDR, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, islast);
+ wait_op_done(host, islast);
}
-static void send_page(struct mxc_nand_host *host, uint8_t buf_id,
- unsigned int ops)
+static void send_page(struct mtd_info *mtd, unsigned int ops)
{
- /* NANDFC buffer 0 is used for page read/write */
- writew(buf_id, host->regs + NFC_BUF_ADDR);
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+ int bufs, i;
- writew(ops, host->regs + NFC_CONFIG2);
+ if (nfc_is_v1() && mtd->writesize > 512)
+ bufs = 4;
+ else
+ bufs = 1;
- /* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, true);
+ for (i = 0; i < bufs; i++) {
+
+ /* NANDFC buffer 0 is used for page read/write */
+ writew(i, host->regs + NFC_BUF_ADDR);
+
+ writew(ops, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host, true);
+ }
}
/* Request the NANDFC to perform a read of the NAND device ID. */
static void send_read_id(struct mxc_nand_host *host)
{
struct nand_chip *this = &host->nand;
- uint16_t tmp;
/* NANDFC buffer 0 is used for device ID output */
writew(0x0, host->regs + NFC_BUF_ADDR);
- /* Read ID into main buffer */
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_SP_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
-
writew(NFC_ID, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, true);
+ wait_op_done(host, true);
if (this->options & NAND_BUSWIDTH_16) {
- void __iomem *main_buf = host->regs + MAIN_AREA0;
+ void __iomem *main_buf = host->main_area0;
/* compress the ID info */
writeb(readb(main_buf + 2), main_buf + 1);
writeb(readb(main_buf + 4), main_buf + 2);
writeb(readb(main_buf + 8), main_buf + 4);
writeb(readb(main_buf + 10), main_buf + 5);
}
- memcpy(host->data_buf, host->regs + MAIN_AREA0, 16);
+ memcpy(host->data_buf, host->main_area0, 16);
}
/* This function requests the NANDFC to perform a read of the
* NAND device status and returns the current status. */
static uint16_t get_dev_status(struct mxc_nand_host *host)
{
- void __iomem *main_buf = host->regs + MAIN_AREA1;
+ void __iomem *main_buf = host->main_area1;
uint32_t store;
- uint16_t ret, tmp;
+ uint16_t ret;
/* Issue status request to NAND device */
/* store the main area1 first word, later do recovery */
* corruption of read/write buffer on status requests. */
writew(1, host->regs + NFC_BUF_ADDR);
- /* Read status into main buffer */
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_SP_EN;
- writew(tmp, host->regs + NFC_CONFIG1);
-
writew(NFC_STATUS, host->regs + NFC_CONFIG2);
/* Wait for operation to complete */
- wait_op_done(host, TROP_US_DELAY, true);
+ wait_op_done(host, true);
/* Status is placed in first word of main buffer */
/* get status, then recovery area 1 data */
u16 i, j;
u16 n = mtd->writesize >> 9;
u8 *d = host->data_buf + mtd->writesize;
- u8 *s = host->regs + SPARE_AREA0;
+ u8 *s = host->spare0;
u16 t = host->spare_len;
j = (mtd->oobsize / n >> 1) << 1;
* the full page.
*/
send_addr(host, 0, page_addr == -1);
- if (host->pagesize_2k)
+ if (mtd->writesize > 512)
/* another col addr cycle for 2k page */
send_addr(host, 0, false);
}
/* paddr_0 - p_addr_7 */
send_addr(host, (page_addr & 0xff), false);
- if (host->pagesize_2k) {
+ if (mtd->writesize > 512) {
if (mtd->size >= 0x10000000) {
/* paddr_8 - paddr_15 */
send_addr(host, (page_addr >> 8) & 0xff, false);
else
host->buf_start = column + mtd->writesize;
- if (host->pagesize_2k)
+ if (mtd->writesize > 512)
command = NAND_CMD_READ0; /* only READ0 is valid */
send_cmd(host, command, false);
mxc_do_addr_cycle(mtd, column, page_addr);
- if (host->pagesize_2k) {
- /* send read confirm command */
+ if (mtd->writesize > 512)
send_cmd(host, NAND_CMD_READSTART, true);
- /* read for each AREA */
- send_page(host, 0, NFC_OUTPUT);
- send_page(host, 1, NFC_OUTPUT);
- send_page(host, 2, NFC_OUTPUT);
- send_page(host, 3, NFC_OUTPUT);
- } else
- send_page(host, 0, NFC_OUTPUT);
-
- memcpy(host->data_buf, host->regs + MAIN_AREA0, mtd->writesize);
+
+ send_page(mtd, NFC_OUTPUT);
+
+ memcpy(host->data_buf, host->main_area0, mtd->writesize);
copy_spare(mtd, true);
break;
* pointer to spare area, we must write the whole page
* including OOB together.
*/
- if (host->pagesize_2k)
+ if (mtd->writesize > 512)
/* call ourself to read a page */
mxc_nand_command(mtd, NAND_CMD_READ0, 0,
page_addr);
host->buf_start = column;
/* Set program pointer to spare region */
- if (!host->pagesize_2k)
+ if (mtd->writesize == 512)
send_cmd(host, NAND_CMD_READOOB, false);
} else {
host->buf_start = column;
/* Set program pointer to page start */
- if (!host->pagesize_2k)
+ if (mtd->writesize == 512)
send_cmd(host, NAND_CMD_READ0, false);
}
break;
case NAND_CMD_PAGEPROG:
- memcpy(host->regs + MAIN_AREA0, host->data_buf, mtd->writesize);
+ memcpy(host->main_area0, host->data_buf, mtd->writesize);
copy_spare(mtd, false);
- send_page(host, 0, NFC_INPUT);
-
- if (host->pagesize_2k) {
- /* data in 4 areas datas */
- send_page(host, 1, NFC_INPUT);
- send_page(host, 2, NFC_INPUT);
- send_page(host, 3, NFC_INPUT);
- }
-
+ send_page(mtd, NFC_INPUT);
send_cmd(host, command, true);
mxc_do_addr_cycle(mtd, column, page_addr);
break;
send_cmd(host, command, true);
mxc_do_addr_cycle(mtd, column, page_addr);
send_read_id(host);
+ host->buf_start = column;
break;
case NAND_CMD_ERASE1:
case NAND_CMD_ERASE2:
+ case NAND_CMD_RESET:
send_cmd(host, command, false);
mxc_do_addr_cycle(mtd, column, page_addr);
}
}
+/*
+ * The generic flash bbt decriptors overlap with our ecc
+ * hardware, so define some i.MX specific ones.
+ */
+static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' };
+static uint8_t mirror_pattern[] = { '1', 't', 'b', 'B' };
+
+static struct nand_bbt_descr bbt_main_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 0,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = 4,
+ .pattern = bbt_pattern,
+};
+
+static struct nand_bbt_descr bbt_mirror_descr = {
+ .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
+ | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
+ .offs = 0,
+ .len = 4,
+ .veroffs = 4,
+ .maxblocks = 4,
+ .pattern = mirror_pattern,
+};
+
static int __init mxcnd_probe(struct platform_device *pdev)
{
struct nand_chip *this;
struct resource *res;
uint16_t tmp;
int err = 0, nr_parts = 0;
+ struct nand_ecclayout *oob_smallpage, *oob_largepage;
/* Allocate memory for MTD device structure and private data */
host = kzalloc(sizeof(struct mxc_nand_host) + NAND_MAX_PAGESIZE +
return -ENOMEM;
host->data_buf = (uint8_t *)(host + 1);
- host->spare_len = 16;
host->dev = &pdev->dev;
/* structures must be linked */
mtd->priv = this;
mtd->owner = THIS_MODULE;
mtd->dev.parent = &pdev->dev;
- mtd->name = "mxc_nand";
+ mtd->name = DRIVER_NAME;
/* 50 us command delay time */
this->chip_delay = 5;
goto eres;
}
- host->regs = ioremap(res->start, resource_size(res));
- if (!host->regs) {
+ host->base = ioremap(res->start, resource_size(res));
+ if (!host->base) {
err = -ENOMEM;
goto eres;
}
+ host->main_area0 = host->base;
+ host->main_area1 = host->base + 0x200;
+
+ if (nfc_is_v21()) {
+ host->regs = host->base + 0x1000;
+ host->spare0 = host->base + 0x1000;
+ host->spare_len = 64;
+ oob_smallpage = &nandv2_hw_eccoob_smallpage;
+ oob_largepage = &nandv2_hw_eccoob_largepage;
+ } else if (nfc_is_v1()) {
+ host->regs = host->base;
+ host->spare0 = host->base + 0x800;
+ host->spare_len = 16;
+ oob_smallpage = &nandv1_hw_eccoob_smallpage;
+ oob_largepage = &nandv1_hw_eccoob_largepage;
+ } else
+ BUG();
+
+ /* disable interrupt and spare enable */
tmp = readw(host->regs + NFC_CONFIG1);
tmp |= NFC_INT_MSK;
+ tmp &= ~NFC_SP_EN;
writew(tmp, host->regs + NFC_CONFIG1);
init_waitqueue_head(&host->irq_waitq);
host->irq = platform_get_irq(pdev, 0);
- err = request_irq(host->irq, mxc_nfc_irq, 0, "mxc_nd", host);
+ err = request_irq(host->irq, mxc_nfc_irq, 0, DRIVER_NAME, host);
if (err)
goto eirq;
writew(0x2, host->regs + NFC_CONFIG);
/* Blocks to be unlocked */
- writew(0x0, host->regs + NFC_UNLOCKSTART_BLKADDR);
- writew(0x4000, host->regs + NFC_UNLOCKEND_BLKADDR);
+ if (nfc_is_v21()) {
+ writew(0x0, host->regs + NFC_V21_UNLOCKSTART_BLKADDR);
+ writew(0xffff, host->regs + NFC_V21_UNLOCKEND_BLKADDR);
+ this->ecc.bytes = 9;
+ } else if (nfc_is_v1()) {
+ writew(0x0, host->regs + NFC_V1_UNLOCKSTART_BLKADDR);
+ writew(0x4000, host->regs + NFC_V1_UNLOCKEND_BLKADDR);
+ this->ecc.bytes = 3;
+ } else
+ BUG();
/* Unlock Block Command for given address range */
writew(0x4, host->regs + NFC_WRPROT);
this->ecc.size = 512;
- this->ecc.bytes = 3;
- this->ecc.layout = &nand_hw_eccoob_smallpage;
+ this->ecc.layout = oob_smallpage;
if (pdata->hw_ecc) {
this->ecc.calculate = mxc_nand_calculate_ecc;
if (pdata->width == 2)
this->options |= NAND_BUSWIDTH_16;
+ if (pdata->flash_bbt) {
+ this->bbt_td = &bbt_main_descr;
+ this->bbt_md = &bbt_mirror_descr;
+ /* update flash based bbt */
+ this->options |= NAND_USE_FLASH_BBT;
+ }
+
/* first scan to find the device and get the page size */
- if (nand_scan_ident(mtd, 1)) {
+ if (nand_scan_ident(mtd, 1, NULL)) {
err = -ENXIO;
goto escan;
}
- if (mtd->writesize == 2048) {
- host->pagesize_2k = 1;
- this->ecc.layout = &nand_hw_eccoob_largepage;
- }
+ if (mtd->writesize == 2048)
+ this->ecc.layout = oob_largepage;
/* second phase scan */
if (nand_scan_tail(mtd)) {
escan:
free_irq(host->irq, host);
eirq:
- iounmap(host->regs);
+ iounmap(host->base);
eres:
clk_put(host->clk);
eclk:
return err;
}
-static int __exit mxcnd_remove(struct platform_device *pdev)
+static int __devexit mxcnd_remove(struct platform_device *pdev)
{
struct mxc_nand_host *host = platform_get_drvdata(pdev);
nand_release(&host->mtd);
free_irq(host->irq, host);
- iounmap(host->regs);
+ iounmap(host->base);
kfree(host);
return 0;
int ret = 0;
DEBUG(MTD_DEBUG_LEVEL0, "MXC_ND : NAND suspend\n");
- if (mtd) {
- ret = mtd->suspend(mtd);
- /* Disable the NFC clock */
- clk_disable(host->clk);
- }
+
+ ret = mtd->suspend(mtd);
+
+ /*
+ * nand_suspend locks the device for exclusive access, so
+ * the clock must already be off.
+ */
+ BUG_ON(!ret && host->clk_act);
return ret;
}
DEBUG(MTD_DEBUG_LEVEL0, "MXC_ND : NAND resume\n");
- if (mtd) {
- /* Enable the NFC clock */
- clk_enable(host->clk);
- mtd->resume(mtd);
- }
+ mtd->resume(mtd);
return ret;
}
.driver = {
.name = DRIVER_NAME,
},
- .remove = __exit_p(mxcnd_remove),
+ .remove = __devexit_p(mxcnd_remove),
.suspend = mxcnd_suspend,
.resume = mxcnd_resume,
};
projects / deliverable / linux.git / blobdiff