* to controllines (due to change in nand.c)
* page_cache added
*
- * $Id: spia.c,v 1.19 2003/04/20 07:24:40 gleixner Exp $
+ * $Id: spia.c,v 1.25 2005/11/07 11:14:31 gleixner Exp $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* a 64Mibit (8MiB x 8 bits) NAND flash device.
*/
+#include <linux/kernel.h>
+#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mtd/mtd.h>
/*
* Values specific to the SPIA board (used with EP7212 processor)
*/
-#define SPIA_IO_ADDR = 0xd0000000 /* Start of EP7212 IO address space */
-#define SPIA_FIO_ADDR = 0xf0000000 /* Address where flash is mapped */
-#define SPIA_PEDR = 0x0080 /*
- * IO offset to Port E data register
- * where the CLE, ALE and NCE pins
- * are wired to.
- */
-#define SPIA_PEDDR = 0x00c0 /*
- * IO offset to Port E data direction
- * register so we can control the IO
- * lines.
- */
+#define SPIA_IO_BASE 0xd0000000 /* Start of EP7212 IO address space */
+#define SPIA_FIO_BASE 0xf0000000 /* Address where flash is mapped */
+#define SPIA_PEDR 0x0080 /*
+ * IO offset to Port E data register
+ * where the CLE, ALE and NCE pins
+ * are wired to.
+ */
+#define SPIA_PEDDR 0x00c0 /*
+ * IO offset to Port E data direction
+ * register so we can control the IO
+ * lines.
+ */
/*
* Module stuff
static int spia_pedr = SPIA_PEDR;
static int spia_peddr = SPIA_PEDDR;
-MODULE_PARM(spia_io_base, "i");
-MODULE_PARM(spia_fio_base, "i");
-MODULE_PARM(spia_pedr, "i");
-MODULE_PARM(spia_peddr, "i");
-
-__setup("spia_io_base=",spia_io_base);
-__setup("spia_fio_base=",spia_fio_base);
-__setup("spia_pedr=",spia_pedr);
-__setup("spia_peddr=",spia_peddr);
+module_param(spia_io_base, int, 0);
+module_param(spia_fio_base, int, 0);
+module_param(spia_pedr, int, 0);
+module_param(spia_peddr, int, 0);
/*
* Define partitions for flash device
*/
-const static struct mtd_partition partition_info[] = {
+static const struct mtd_partition partition_info[] = {
{
- .name = "SPIA flash partition 1",
- .offset = 0,
- .size = 2*1024*1024
- },
+ .name = "SPIA flash partition 1",
+ .offset = 0,
+ .size = 2 * 1024 * 1024},
{
- .name = "SPIA flash partition 2",
- .offset = 2*1024*1024,
- .size = 6*1024*1024
- }
+ .name = "SPIA flash partition 2",
+ .offset = 2 * 1024 * 1024,
+ .size = 6 * 1024 * 1024}
};
-#define NUM_PARTITIONS 2
+#define NUM_PARTITIONS 2
-/*
+/*
* hardware specific access to control-lines
-*/
-void spia_hwcontrol(int cmd){
-
- switch(cmd){
+ *
+ * ctrl:
+ * NAND_CNE: bit 0 -> bit 2
+ * NAND_CLE: bit 1 -> bit 0
+ * NAND_ALE: bit 2 -> bit 1
+ */
+static void spia_hwcontrol(struct mtd_info *mtd, int cmd)
+{
+ struct nand_chip *chip = mtd->priv;
- case NAND_CTL_SETCLE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) |= 0x01; break;
- case NAND_CTL_CLRCLE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) &= ~0x01; break;
+ if (ctrl & NAND_CTRL_CHANGE) {
+ void __iomem *addr = spia_io_base + spia_pedr;
+ unsigned char bits;
- case NAND_CTL_SETALE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) |= 0x02; break;
- case NAND_CTL_CLRALE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) &= ~0x02; break;
+ bits = (ctrl & NAND_CNE) << 2;
+ bits |= (ctrl & NAND_CLE | NAND_ALE) >> 1;
+ writeb((readb(addr) & ~0x7) | bits, addr);
+ }
- case NAND_CTL_SETNCE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) &= ~0x04; break;
- case NAND_CTL_CLRNCE: (*(volatile unsigned char *) (spia_io_base + spia_pedr)) |= 0x04; break;
- }
+ if (cmd != NAND_CMD_NONE)
+ writeb(cmd, chip->IO_ADDR_W);
}
/*
* Main initialization routine
*/
-int __init spia_init (void)
+static int __init spia_init(void)
{
struct nand_chip *this;
/* Allocate memory for MTD device structure and private data */
- spia_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
- GFP_KERNEL);
+ spia_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
if (!spia_mtd) {
- printk ("Unable to allocate SPIA NAND MTD device structure.\n");
+ printk("Unable to allocate SPIA NAND MTD device structure.\n");
return -ENOMEM;
}
/* Get pointer to private data */
- this = (struct nand_chip *) (&spia_mtd[1]);
+ this = (struct nand_chip *)(&spia_mtd[1]);
/* Initialize structures */
- memset((char *) spia_mtd, 0, sizeof(struct mtd_info));
- memset((char *) this, 0, sizeof(struct nand_chip));
+ memset(spia_mtd, 0, sizeof(struct mtd_info));
+ memset(this, 0, sizeof(struct nand_chip));
/* Link the private data with the MTD structure */
spia_mtd->priv = this;
+ spia_mtd->owner = THIS_MODULE;
/*
* Set GPIO Port E control register so that the pins are configured
* to be outputs for controlling the NAND flash.
*/
- (*(volatile unsigned char *) (spia_io_base + spia_peddr)) = 0x07;
+ (*(volatile unsigned char *)(spia_io_base + spia_peddr)) = 0x07;
/* Set address of NAND IO lines */
- this->IO_ADDR_R = spia_fio_base;
- this->IO_ADDR_W = spia_fio_base;
+ this->IO_ADDR_R = (void __iomem *)spia_fio_base;
+ this->IO_ADDR_W = (void __iomem *)spia_fio_base;
/* Set address of hardware control function */
- this->hwcontrol = spia_hwcontrol;
+ this->cmd_ctrl = spia_hwcontrol;
/* 15 us command delay time */
- this->chip_delay = 15;
+ this->chip_delay = 15;
/* Scan to find existence of the device */
- if (nand_scan (spia_mtd)) {
- kfree (spia_mtd);
+ if (nand_scan(spia_mtd, 1)) {
+ kfree(spia_mtd);
return -ENXIO;
}
- /* Allocate memory for internal data buffer */
- this->data_buf = kmalloc (sizeof(u_char) * (spia_mtd->oobblock + spia_mtd->oobsize), GFP_KERNEL);
- if (!this->data_buf) {
- printk ("Unable to allocate NAND data buffer for SPIA.\n");
- kfree (spia_mtd);
- return -ENOMEM;
- }
-
/* Register the partitions */
add_mtd_partitions(spia_mtd, partition_info, NUM_PARTITIONS);
/* Return happy */
return 0;
}
+
module_init(spia_init);
/*
* Clean up routine
*/
-#ifdef MODULE
-static void __exit spia_cleanup (void)
+static void __exit spia_cleanup(void)
{
- struct nand_chip *this = (struct nand_chip *) &spia_mtd[1];
-
- /* Unregister the device */
- del_mtd_device (spia_mtd);
-
- /* Free internal data buffer */
- kfree (this->data_buf);
+ /* Release resources, unregister device */
+ nand_release(spia_mtd);
/* Free the MTD device structure */
- kfree (spia_mtd);
+ kfree(spia_mtd);
}
+
module_exit(spia_cleanup);
-#endif
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com");
git://git.onelab.eu / linux-2.6.git / blobdiff