* This is a device driver for the NAND flash device found on the
* TI fido board. It supports 32MiB and 64MiB cards
*
- * $Id: toto.c,v 1.2 2003/10/21 10:04:58 dwmw2 Exp $
+ * $Id: toto.c,v 1.5 2005/11/07 11:14:31 gleixner Exp $
*/
#include <linux/slab.h>
#include <asm/arch-omap1510/hardware.h>
#include <asm/arch/gpio.h>
+#define CONFIG_NAND_WORKAROUND 1
+
/*
* MTD structure for TOTO board
*/
static struct mtd_info *toto_mtd = NULL;
-static int toto_io_base = OMAP_FLASH_1_BASE;
-
-#define CONFIG_NAND_WORKAROUND 1
+static unsigned long toto_io_base = OMAP_FLASH_1_BASE;
-#define NAND_NCE 0x4000
-#define NAND_CLE 0x1000
-#define NAND_ALE 0x0002
-#define NAND_MASK (NAND_CLE | NAND_ALE | NAND_NCE)
-
-#define T_NAND_CTL_CLRALE(iob) gpiosetout(NAND_ALE, 0)
-#define T_NAND_CTL_SETALE(iob) gpiosetout(NAND_ALE, NAND_ALE)
-#ifdef CONFIG_NAND_WORKAROUND /* "some" dev boards busted, blue wired to rts2 :( */
-#define T_NAND_CTL_CLRCLE(iob) gpiosetout(NAND_CLE, 0); rts2setout(2, 2)
-#define T_NAND_CTL_SETCLE(iob) gpiosetout(NAND_CLE, NAND_CLE); rts2setout(2, 0)
-#else
-#define T_NAND_CTL_CLRCLE(iob) gpiosetout(NAND_CLE, 0)
-#define T_NAND_CTL_SETCLE(iob) gpiosetout(NAND_CLE, NAND_CLE)
-#endif
-#define T_NAND_CTL_SETNCE(iob) gpiosetout(NAND_NCE, 0)
-#define T_NAND_CTL_CLRNCE(iob) gpiosetout(NAND_NCE, NAND_NCE)
-
/*
* Define partitions for flash devices
*/
#define NUM_PARTITIONS32M 3
#define NUM_PARTITIONS64M 4
-/*
- * hardware specific access to control-lines
-*/
-static void toto_hwcontrol(struct mtd_info *mtd, int cmd)
+/*
+ * hardware specific access to control-lines
+ *
+ * ctrl:
+ * NAND_NCE: bit 0 -> bit 14 (0x4000)
+ * NAND_CLE: bit 1 -> bit 12 (0x1000)
+ * NAND_ALE: bit 2 -> bit 1 (0x0002)
+ */
+static void toto_hwcontrol(struct mtd_info *mtd, int cmd,
+ unsigned int ctrl)
{
+ struct nand_chip *chip = mtd->priv;
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+ unsigned long bits;
- udelay(1); /* hopefully enough time for tc make proceding write to clear */
- switch(cmd){
+ /* hopefully enough time for tc make proceding write to clear */
+ udelay(1);
- case NAND_CTL_SETCLE: T_NAND_CTL_SETCLE(cmd); break;
- case NAND_CTL_CLRCLE: T_NAND_CTL_CLRCLE(cmd); break;
+ bits = (~ctrl & NAND_NCE) << 14;
+ bits |= (ctrl & NAND_CLE) << 12;
+ bits |= (ctrl & NAND_ALE) >> 1;
- case NAND_CTL_SETALE: T_NAND_CTL_SETALE(cmd); break;
- case NAND_CTL_CLRALE: T_NAND_CTL_CLRALE(cmd); break;
+#warning Wild guess as gpiosetout() is nowhere defined in the kernel source - tglx
+ gpiosetout(0x5002, bits);
- case NAND_CTL_SETNCE: T_NAND_CTL_SETNCE(cmd); break;
- case NAND_CTL_CLRNCE: T_NAND_CTL_CLRNCE(cmd); break;
+#ifdef CONFIG_NAND_WORKAROUND
+ /* "some" dev boards busted, blue wired to rts2 :( */
+ rts2setout(2, (ctrl & NAND_CLE) << 1);
+#endif
+ /* allow time to ensure gpio state to over take memory write */
+ udelay(1);
}
- udelay(1); /* allow time to ensure gpio state to over take memory write */
+
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, chip->IO_ADDR_W);
}
/*
* Main initialization routine
*/
-int __init toto_init (void)
+static int __init toto_init(void)
{
struct nand_chip *this;
int err = 0;
/* Allocate memory for MTD device structure and private data */
- toto_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
- GFP_KERNEL);
+ toto_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
if (!toto_mtd) {
- printk (KERN_WARNING "Unable to allocate toto NAND MTD device structure.\n");
+ printk(KERN_WARNING "Unable to allocate toto NAND MTD device structure.\n");
err = -ENOMEM;
goto out;
}
/* Get pointer to private data */
- this = (struct nand_chip *) (&toto_mtd[1]);
+ this = (struct nand_chip *)(&toto_mtd[1]);
/* Initialize structures */
- memset((char *) toto_mtd, 0, sizeof(struct mtd_info));
- memset((char *) this, 0, sizeof(struct nand_chip));
+ memset(toto_mtd, 0, sizeof(struct mtd_info));
+ memset(this, 0, sizeof(struct nand_chip));
/* Link the private data with the MTD structure */
toto_mtd->priv = this;
+ toto_mtd->owner = THIS_MODULE;
/* Set address of NAND IO lines */
this->IO_ADDR_R = toto_io_base;
this->IO_ADDR_W = toto_io_base;
- this->hwcontrol = toto_hwcontrol;
+ this->cmd_ctrl = toto_hwcontrol;
this->dev_ready = NULL;
/* 25 us command delay time */
- this->chip_delay = 30;
- this->eccmode = NAND_ECC_SOFT;
+ this->chip_delay = 30;
+ this->ecc.mode = NAND_ECC_SOFT;
- /* Scan to find existance of the device */
- if (nand_scan (toto_mtd, 1)) {
+ /* Scan to find existance of the device */
+ if (nand_scan(toto_mtd, 1)) {
err = -ENXIO;
goto out_mtd;
}
- /* Allocate memory for internal data buffer */
- this->data_buf = kmalloc (sizeof(u_char) * (toto_mtd->oobblock + toto_mtd->oobsize), GFP_KERNEL);
- if (!this->data_buf) {
- printk (KERN_WARNING "Unable to allocate NAND data buffer for toto.\n");
- err = -ENOMEM;
- goto out_mtd;
- }
-
/* Register the partitions */
- switch(toto_mtd->size){
- case SZ_64M: add_mtd_partitions(toto_mtd, partition_info64M, NUM_PARTITIONS64M); break;
- case SZ_32M: add_mtd_partitions(toto_mtd, partition_info32M, NUM_PARTITIONS32M); break;
- default: {
- printk (KERN_WARNING "Unsupported Nand device\n");
+ switch (toto_mtd->size) {
+ case SZ_64M:
+ add_mtd_partitions(toto_mtd, partition_info64M, NUM_PARTITIONS64M);
+ break;
+ case SZ_32M:
+ add_mtd_partitions(toto_mtd, partition_info32M, NUM_PARTITIONS32M);
+ break;
+ default:{
+ printk(KERN_WARNING "Unsupported Nand device\n");
err = -ENXIO;
goto out_buf;
}
}
- gpioreserve(NAND_MASK); /* claim our gpios */
- archflashwp(0,0); /* open up flash for writing */
+ gpioreserve(NAND_MASK); /* claim our gpios */
+ archflashwp(0, 0); /* open up flash for writing */
goto out;
-
-out_buf:
- kfree (this->data_buf);
-out_mtd:
- kfree (toto_mtd);
-out:
+
+ out_mtd:
+ kfree(toto_mtd);
+ out:
return err;
}
/*
* Clean up routine
*/
-static void __exit toto_cleanup (void)
+static void __exit toto_cleanup(void)
{
- struct nand_chip *this = (struct nand_chip *) &toto_mtd[1];
-
- /* Unregister partitions */
- del_mtd_partitions(toto_mtd);
-
- /* Unregister the device */
- del_mtd_device (toto_mtd);
-
- /* Free internal data buffers */
- kfree (this->data_buf);
+ /* Release resources, unregister device */
+ nand_release(toto_mtd);
/* Free the MTD device structure */
- kfree (toto_mtd);
+ kfree(toto_mtd);
/* stop flash writes */
- archflashwp(0,1);
-
+ archflashwp(0, 1);
+
/* release gpios to system */
- gpiorelease(NAND_MASK);
+ gpiorelease(NAND_MASK);
}
+
module_exit(toto_cleanup);
MODULE_LICENSE("GPL");
git://git.onelab.eu / linux-2.6.git / blobdiff